Research Policy 49 (2020) 103978
Contents lists available at ScienceDirect
Research Policy
journal homepage: www.elsevier.com/locate/respol
Citizen science and sustainability transitions
a,b,⁎
c
d
e
c,f
, Katrin Vohland , Vyron Antoniou , Bálint Balázs , Claudia Göbel ,
Henry Sauermann
Kostas Karatzasg, Peter Mooneyh, Josep Perellói,j, Marisa Pontik, Roeland Samsonl, Silvia Winterm
T
a
European School of Management and Technology (ESMT), Berlin, Schlossplatz 1, Berlin 10178, Germany
National Bureau of Economic Research (NBER), 1050 Massachusetts Ave., Cambridge, MA 02138, United States
Museum für Naturkunde Berlin (MfN), Leibniz Institute for Evolution and Biodiversity Science, Berlin, Invalidenstraße 43, Berlin 10115, Germany
d
Hellenic Military Geographic Directorate, H.A.G.S. Papagou Headquarter Facilities, Mesogeion Ave. 227-231, Holargos 15669, Greece
e
Environmental Social Science Research Group (ESSRG), Impact Hub Budapest, Ferenciek tere 2., Budapest 1053, Hungary
f
Institute for Higher Education Research Halle-Wittenberg (HoF), Wittenberg, Collegienstraße 62, Lutherstadt Wittenberg 06886, Germany
g
Environmental Informatics Research Group, School of Mechanical Engineering, Faculty of Engineering, Aristotle University of Thessaloniki, Egnatia Str., Box 483,
Thessaloniki 54124, Greece
h
Geotechnologies Research Group, Department of Computer Science, Maynooth University, W23 F2H6 Maynooth, Co. Kildare, Ireland
i
OpenSystems Research Group, Departament de Física de la Matèria Condensada, Universitat de Barcelona, Martí i Franquès 1, Barcelona 08028, Spain
j
Universitat de Barcelona Institute of Complex Systems, Martí i Franquès 1, Barcelona 08028, Spain
k
Department of Applied IT, University of Gothenburg, Forskningsgången 6, Göteborg 41756, Sweden
l
Lab of Environmental and Urban Ecology (EUREC-Air), University of Antwerp, Groenenborgerlaan 171, Antwerp 2020, Belgium
m
University of Natural Resources and Life Sciences, Vienna (BOKU), Gregor-Mendel-Str. 33, Vienna 1180, Austria
b
c
A R TICL E INFO
A BSTR A CT
Keywords:
Citizen science
Crowd science
Co-design
Sustainability transitions
Science and innovation studies
Science education
Citizen Science (CS) projects involve members of the general public as active participants in research. While
some advocates hope that CS can increase scientific knowledge production (“productivity view”), others emphasize that it may bridge a perceived gap between science and the broader society (“democratization view”).
We discuss how an integration of both views can allow Citizen Science to support complex sustainability
transitions in areas such as renewable energy, public health, or environmental conservation. We first identify
three pathways through which such impacts can occur: (1) Problem identification and agenda setting; (2)
Resource mobilization; and (3) Facilitating socio-technical co-evolution. To realize this potential, however, CS
needs to address important challenges that emerge especially in the context of sustainability transitions:
Increasing the diversity, level, and intensity of participation; addressing the social as well as technical nature of
sustainability problems; and reducing tensions between CS and the traditional institution of academic science.
Grounded in a review of academic literature and policy reports as well as a broad range of case examples, this
article contributes to scholarship on science, innovation, and sustainability transitions. We also offer insights for
actors involved in initiating or institutionalizing Citizen Science efforts, including project organizers, funding
agencies, and policy makers.
1. Introduction
Scholars pay increasing attention to Citizen Science (CS), the direct
involvement of the public in scientific research. Studies of CS appear in
a broad range of fields and outlets, revealing different views of opportunities and challenges (e.g., Bonney et al., 2014; Franzoni and
Sauermann, 2014; Khatib et al., 2011; Wiggins and Crowston, 2011).
While some see CS primarily as a means to increase the productivity of
traditional scientific research, others see it as an opportunity to democratize science by opening traditional institutions (Irwin, 1995;
⁎
Nielsen, 2011). In this paper, we argue that these two views reflect
complementary aspects of Citizen Science that give it the potential to
help address sustainability problems, i.e., complex challenges to meet the
needs of the present without jeopardizing the needs of future generations (United Nations, 1987). Such sustainability problems may relate
to aspects of the natural environment such as preserving biodiversity or
conserving natural resources, but also to socioeconomic issues such as
health, poverty reduction, and other aspects of welfare and peace. The
severity and the scope of today's sustainability problems are evident in
the seventeen UN Sustainable Development Goals (SDGs; Fig. 1).
Corresponding author.
E-mail address: henry.sauermann@esmt.org (H. Sauermann).
https://doi.org/10.1016/j.respol.2020.103978
Received 25 March 2018; Received in revised form 12 March 2020; Accepted 21 March 2020
Available online 20 April 2020
0048-7333/ © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license
(http://creativecommons.org/licenses/BY/4.0/).
Research Policy 49 (2020) 103978
H. Sauermann, et al.
Fig. 1. United Nations Sustainable Development Goals (SDGs). Source: https://www.un.org/sustainabledevelopment/sustainable-development-goals/.
innovation throughout Europe”.2 In that workshop, participants identified key opportunities and challenges for Citizen Science in an iterative way by clustering insights derived from brainstorming and visual
mapping. Co-authors also contributed to this article insights from their
experiences as initiators of CS projects, several of which included participant surveys and feedback meetings with citizens and other stakeholders.3 In addition, we had discussions with leaders of large CS
platforms such as Zooniverse.org, Experiment.com, and Scienceathome.org to learn about their experiences and ask about topics such as
participation challenges, project outcomes, and the relations between
professional and citizen scientists. Finally, we gained insights through
interactions with citizens outside of particular CS projects. For example,
one co-author mentored high school students who developed a framework to engage young citizens using CS approaches.4 Other co-authors
interacted with citizens in their capacity as leaders of public engagement with science efforts at a Natural History Museum. To learn about
the perspectives of citizens who have not yet participated in CS, we also
gathered input through a survey on the MTurk platform.5
Citizen Science has raised great hopes among scientists, civil society
groups, and policy makers. For example, the European Citizen Science
Association's (2015) strategy sets an explicit goal to contribute to sustainability transformation, the European Commission (2017) recommends to mobilize citizens for research in order to enhance the
impact of EU research and innovation programs, and the
U.S. Federal Citizen Science Initiative (2018) also seeks to foster citizens’ involvement in research. Although some of the prior literature
takes a strong normative stand (Felt and Fochler, 2008), our goal is to
develop a systematic and balanced understanding of the opportunities
and challenges of Citizen Science in the particular context of
To discuss how Citizen Science can help address sustainability
problems, we integrate two streams of literature. The first includes
research on Citizen Science that discusses how the general public can
get involved in all stages of the research process (Bonney et al., 2009;
Irwin, 1995; West and Pateman, 2017). This work demonstrates that
citizens can increase the production of valuable scientific knowledge by
contributing significant effort and knowledge resources to projects. At
the same time, CS can allow citizens to shape the direction of research,
learn, and advocate more effectively for socio-political changes.
The second stream encompasses work on sustainability transitions
(STs) – transformation processes through which socio-technical systems
shift to more sustainable modes of production and consumption
(Hölscher et al., 2018; Markard et al., 2012; Smith et al., 2005). This
literature informs us that STs are often enabled by new scientific
knowledge and technologies in areas such as renewable energy, efficient transportation systems, sustainable agricultural methods, or vaccines and public sanitation (Geels, 2006; Jury and Vaux, 2005;
Mowery et al., 2010). However, technological innovation needs to coevolve with social and institutional structures. Attention to this sociotechnical intermingling is required both to understand sustainability
transitions and to manage them (Geels and Schot, 2007; Markard et al.,
2012; Smith et al., 2010).
Drawing on both literatures, we argue that Citizen Science can
support sustainability transitions through three important pathways:
(1) Helping identify sustainability problems and setting research
agendas; (2) Mobilizing resources in the form of effort and knowledge;
and (3) Facilitating the co-evolution of socio-technical aspects of transitions. Notwithstanding this considerable potential, we also identify
important challenges for Citizen Science that emerge especially in the
context of STs: (1) Increasing the diversity, levels, and intensity of
participation; (2) Addressing technical as well as social aspects of sustainability problems; and (3) Reducing tensions with the traditional
institution of academic science. We discuss these challenges, clarify
how they affect each of the three pathways connecting CS and STs, and
assess the evidence regarding potential solutions.
Our discussion builds on the scholarly literatures on CS and STs,
related policy documents, as well as published case studies of CS projects. We also synthesize discussions at several International Citizen
Science Conferences1 as well as a workshop of the EU COST Action
“Citizen Science to promote creativity, scientific literacy, and
2
https://cs-eu.net/wgs
Examples of projects include https://airbezen.be/, http://www.urwatair.gr/,
https://app.inspiresproject.com/projects/6-fix-my-food-system,
http://igelimgarten.boku.ac.at,
http://www.togetherscience.eu/,
http://
www.ub.edu/opensystems/projectes/, and https://www.sparklingscience.at/
en.
4
https://www.young-economic-summit.org/en/involving-citizens-in-research-improving-science-and-society-2/
5
This survey on the MTurk crowdsourcing platform was the pilot for a
broader study of participation patterns and project choices in CS. For the current paper, we draw on open ended responses from over 100 citizens who had
not yet participated in CS to illustrate their perceptions of opportunities and
barriers for personal participation. Quantitative data from the main survey will
be presented elsewhere.
3
1
2015 San Jose, USA; 2016 Berlin, Germany; 2017 St. Paul, USA; 2018
Geneva, Switzerland; 2019 Raleigh, USA.
2
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H. Sauermann, et al.
sustainability transitions.
important challenges that Citizen Science is facing, especially in the
context of STs.8
First, a “productivity view” is rooted in the traditional professional
scientific enterprise. The main rationale for involving citizens in research is that professional scientists can obtain additional resources for
research and accelerate the production of scientific knowledge
(Christian et al., 2012; Khatib et al., 2011; Nielsen, 2011). This view
adopts the premise that scientific knowledge is intrinsically valuable
and will – at least in the long-term – be beneficial for society
(Bush, 1945; Simis et al., 2016; Woolley et al., 2016). Projects are led
by professional scientists, and citizens contribute through activities
such as collecting large amounts of data, performing labeling and
analysis tasks, or creative problem solving. The benefits of citizens’
involvement can be measured in terms of hours worked, the volume of
data processed, or the number of publications written based on CS data
(Burgess et al., 2017; Follett and Strezov, 2015; Sauermann and
Franzoni, 2015). In this view, Citizen Science does not question the
supremacy of professional expertise and does not challenge the norms
and performance standards of professional science; science remains a
distinct institutional sphere. Central aspects of this productivity view
are reflected in many of the case reports written by professional scientists as well as analyses by economists and management scholars
(e.g., Bonney et al., 2009; Christian et al., 2012; Khatib et al., 2011;
Sauermann and Franzoni, 2015).
Second, a “democratization view” sees Citizen Science as the contextualization of research in society and challenges the separation of
science from society. An important premise is that the value of
knowledge depends on the needs and preferences of the broader public,
and that attention is needed to unintended consequences of technoscientific progress along with the unequal distribution of its costs and
benefits (Stilgoe et al., 2013). CS allows citizens to shape the direction
of research towards societal needs and to contribute knowledge that
may be underappreciated by the scientific establishment (Irwin 1995).
CS increases the transparency of science and enables citizens to learn
about particular objects of research (e.g., birds or air quality) as well as
about the research process. This increases awareness of problems and
enables citizens to advocate for socio-political changes (Hecker et al.,
2018; Stilgoe, 2009). Projects are initiated and led by citizens; data and
outputs are freely accessible (Groom et al., 2017). Although the aspiration is to do “science”, the processes and standards of professional
science are considered socially determined and contestable
(McCormick, 2007; Ottinger, 2010). Similarly, the primacy of professional expertise and formal education can be challenged. Central aspects of this democratization view are salient in many projects initiated
by citizens as well as in analyses by scholars in areas such as science and
technology studies or public understanding of science (e.g.,
Haklay, 2015; Irwin, 1995; Ottinger, 2010).
In the following Section 3, we discuss how processes and outcomes
highlighted by both views are necessary for Citizen Science to support
sustainability transitions. However, integrating the two views also
creates challenges, especially in the context of socio-technical transitions. We discuss key challenges and potential solutions in Section 4.
2. Background: the citizen science landscape
Non-professionals (“citizens”) have been doing research for centuries (Mahr, 2014; Shapin, 2008; Strasser, 2012). In this sense, Citizen
Science pre-dates institutionalized research. One of the oldest ongoing
projects framed as CS is the Audubon Society's Christmas Bird Count,
started in 1900 (Miller-Rushing et al., 2012). This project has been
followed by many others that typically involved local communities in
monitoring and data collection activities. New technologies such as
mobile phones and the internet give citizens an increasing set of tools to
help with research and allow them to participate in physical as well as
virtual space (Newman et al., 2012). As such, there has been a dramatic
rise in the number and diversity of CS projects in the last decade.6
Citizen Science projects are now active in a wide range of fields such
as biological conservation, astronomy, medicine, environmental science, and archeology. A common typology distinguishes projects based
on the extent of citizens’ involvement in the research process
(Bonney et al., 2009; Follett and Strezov, 2015). First, citizens may help
professional scientists by participating in a narrow range of activities,
typically collecting or processing data (“contributory projects”). For
example, participants in the global project eBird record bird sightings,
contributing data for professional researchers who study the impact of
environmental and human influences on animal populations
(Sullivan et al., 2009). Second, citizens can participate in a broader
range of activities, including aspects such as developing data collection
methods or analyzing data, although the goals of the project are still
defined by professional project leaders (“collaborative projects”). Third,
citizens can be involved in the full set of activities, notably including
the formulation of research questions that will be addressed in the
project (“co-created projects”). Finally, while co-created projects still
involve professional scientists, citizens can also perform all aspects of
the research without professionals (what we call “autonomous” Citizen
Science). Surveys of the CS landscape show that most current projects
are contributory in nature (Franzoni and Sauermann, 2014;
Hecker et al., 2018; Science Europe, 2018; Turrini et al., 2018).7
Before considering how Citizen Science can support sustainability
transitions, it is useful to clarify its key features. Towards this end, we
reviewed literature in different disciplines, including primary research
using Citizen Science approaches as well as scholarly discussions of CS
and related policy reports. We also synthesized discussions with professional scientists and citizens engaged in CS. Finally, we abstracted
from nuances to identify six broader dimensions that capture the
overarching rationale for involving citizens in research, underlying
assumptions, key mechanisms that are used, as well as implications for
the institution of science. In this process, we realized that convergence
on a single characterization of Citizen Science along these dimensions
was impossible: Instead, two quite different views emerged.
Table 1 summarizes these two views. We note that these are “idealtypes”, i.e., abstract models that emphasize central features and facilitate comparative analysis (Sauermann and Stephan, 2013;
Weber, 1997). Our claim is not that all scholars fully endorse one of
these views, nor that all projects fit neatly in one or the other. However,
outlining these two views provides a useful basis to discuss how core
aspects of Citizen Science can support socio-technical sustainability
transitions. More importantly, clarifying differences in the goals, underlying assumptions, and mechanisms of the two views points towards
3. Citizen science to support sustainability transitions
Sustainability transitions can focus on many different aspects of
nature and society (see Fig. 1). However, transitions are invariably of a
socio-technical in nature, i.e., they involve new knowledge and
6
Catalogs of projects include https://scistarter.com/ and http://www.
buergerschaffenwissen.de/.
7
Although discussions of Citizen Science typically focus on contributions of
time and knowledge, citizens have also started to provide financial resources by
crowdfunding research projects. This includes a large share of projects addressing sustainability problems (Sauermann et al., 2019).
8
Some articles draw a similar distinction between the “Bonney” vs. “Irwin”
tradition of Citizen Science, referring to two seminal early contributors
(Bonney et al., 2009; Irwin, 1995; Riesch and Potter, 2014; Woolley et al.,
2016). Bonney and Irwin have continued to develop their perspectives on Citizen Science over the years; our two ideal-type views are on purpose more
distinct to reduce overlap and highlight potential tensions.
3
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H. Sauermann, et al.
Table 1
Productivity vs. democratization view of Citizen Science (ideal-types).
Primary rationale for Citizen
Science
Epistemological premise
Extent of citizen involvement
Control of decisions and
ownership of outputs
Key performance metrics
Institutional implications
Productivity View
Democratization View
Involving citizens increases professional scientists’ research
productivity by mobilizing additional resources (e.g., effort
and knowledge inputs).
Scientific knowledge has intrinsic value.
Selected stages of the research process (contributory and
collaborative CS).
Professional scientists.
CS democratizes science by allowing citizens to direct research towards
societally relevant problems. Citizens can take agency in the research process
as well as in the use of results.
Scientific knowledge can generate benefits and risks, or be irrelevant. Its
value depends on the needs and preferences of the broader public.
All stages of the research process, including problem definition (co-created
and autonomous CS).
Citizens.
Hours contributed, volume of data collected, number of
papers published.
Science is performed in the traditional system. CS accepts
professional expertise, norms and standards.
Number of citizens involved, societal problems solved, extent of social
change, citizen learning.
CS extends the conduct of science beyond the traditional system. Challenges
professional expertise, norms and standards.
technologies as well as changes in behaviors and policies
(Hölscher et al., 2018; Markard et al., 2012). Examples include transitions towards renewable energy sources, sustainable agricultural
methods, or public sanitation.
A large literature examines how sustainability transitions unfold
(for reviews, see Loorbach et al., 2017; Markard et al., 2012). We draw
on this literature to highlight central features of STs and discuss how
Citizen Science can support transitions via three pathways. Of course,
our discussion is not meant to discuss all important aspects of sustainability transitions; rather, our goal is to identify areas where CS and
STs can most fruitfully intersect. Fig. 2 summarizes the three pathways
as well as their interdependencies.
3.1. Problem identification and agenda setting
Sustainability problems are “wicked”: They are highly complex,
characterized by uncertainty, and involve value divergence between
different stakeholders (Head, 2008; Van der Brugge et al., 2005). Thus,
problems need to be identified and structured, and decisions have to be
made about the direction of efforts to develop new scientific knowledge
and technologies (Loorbach et al., 2017; Smith et al., 2010).
In traditional academic research, the identification and prioritization of research questions is driven primarily from within the academic
community based on factors such as perceived scientific impact and
value judgments of professional peers (Latour, 1987; Sauermann and
Fig. 2. Three pathways of Citizen Science support for sustainability transitions, and their interdependencies.
4
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H. Sauermann, et al.
Antwerp (Van Brussel and Huyse, 2018). It secured the necessary resources through crowdfunding and enlisted researchers from local
universities and research institutes as professional collaborators in the
project.
Although these examples illustrate how citizens can identify and
direct research efforts towards sustainability problems, they also
highlight that problems are not universal but reflect the interests and
needs of particular groups of citizens.9 Moreover, although “sustainability” is often used as a general term, different sustainability goals can
conflict – such as the goal to preserve the natural environment and the
goal to improve living standards through economic growth
(Pradhan et al., 2017; Trisos et al., 2019). Indeed, the difficulty of reconciling competing interests is one of the key features of wicked
problems and of the governance of sustainability transitions
(Patterson et al., 2017; Rittel and Webber, 1973). The “democratization
view” posits that CS democratizes science by allowing the public to
shape research agendas that have traditionally been set by professionals. To the extent that these processes are transparent and involve a
broad range of stakeholders, this may also help align the interests of
“multiple publics” (Ribeiro et al., 2018; Stilgoe et al., 2014). Of course,
citizen participation does not automatically resolve value conflicts or
eliminate inherent trade-offs between different sustainability goals. As
such, the impact of Citizen Science in problem framing and agenda
setting processes depends critically on which citizens get involved and
how representative they are of the broader population. We will return
to this issue when discussing challenges in Section 4.
Citizen Science is not the only mechanism allowing citizens to shape
the direction of research. The literature on public engagement in science discusses others such as roundtables or consensus conferences
(Stilgoe et al., 2014). Many of these mechanisms are initiated by policy
makers in order to give citizens a voice in important decisions and are
moderated by professional agents (Felt and Fochler, 2008). Although a
detailed comparison of the different mechanisms is beyond the scope of
this paper, CS projects differ in important ways. In particular, collaborations tend to be more informal, often initiated by individual scientists seeking input from citizens or by citizens seeking help from
professionals to address specific problems (Druschke and Seltzer, 2012;
Van Brussel and Huyse, 2018). Participation is also more open in that
people are generally not pre-selected by organizers or represent particular stakeholder groups but participate as individuals because they
themselves decide to engage (Pettibone et al., 2018). Finally, interactions in CS projects do not rely on “stage-managed spaces of engagement” (Stilgoe et al., 2014, p. 7) but often involve personal interactions
between citizens and scientists. Such interactions may strengthen social
relationships, facilitate the open exchange of different perspectives, and
improve mutual understanding (Felt and Fochler, 2008), potentially
resulting in a more effective identification of research areas where the
interests and capabilities of scientists intersect with the needs of the
broader public (Senabre et al., 2018). The contrast to public engagement exercises is perhaps clearest for “autonomous” Citizen Science
projects that proceed without involvement of professionals or policy
makers, turning citizens from providers of opinions and feedback to
actors who take matters in their own hands.
Stephan, 2013). In STs, however, these processes unfold in a decentralized manner and involve constellations of multiple actors, including
potential users (Boon et al., 2011; Kuhlmann and Rip, 2018;
Mowery et al., 2010). For example, pressure from citizens and merchants was instrumental in focusing researchers’ attention on addressing public sanitation in the 19th century (Geels, 2006) and, more recently, on the development of alternatives to harmful CFC coolants in
household appliances (Van de Poel, 2003). Various stakeholder groups
were also involved in shaping the discourse on problems with Dutch
water management and in identifying more sustainable approaches
(Van der Brugge et al., 2005).
We suggest that Citizen Science can play an important role in
identifying and structuring problems as well as in setting research
agendas based on diverse stakeholder needs. One approach is to cocreate projects and involve citizens in all aspects of research, including
the identification of research questions. Consider the example of a
project led by the Extreme Citizen Science research group at the
University College London, which collaborated with herders and
farmers in Kenya to study ecosystem change and preserve local ecological knowledge (ExCiteS, 2019). The UCL scientists spent considerable
time with the local community to discuss what problems it faced and to
brainstorm how the available UCL technical infrastructure for data
collection and monitoring might help citizens to study and address their
problems. Among others, the citizens used their knowledge about the
local ecosystem to identify 134 plant species that needed to be monitored. Based on their understanding of the socio-political context, they
also identified the need for mechanisms to share the data with each
other and with regional partners in order to facilitate decision-making.
The citizens then participated actively in the development of the project
infrastructure (e.g., by taking the sample photos used for identification)
as well as in the actual data collection.
A second approach is to ask citizens specifically to identify problems, without involving them in other stages of the research. For example, an Austrian research foundation seeking to award research
funding reached out to citizens to identify understudied research
questions in health. A first iteration of this project focused on mental
health and received input from hundreds of citizens, including patients
and doctors (Ludwig Boltzmann Gesellschaft, 2018). Illustrating the
benefits of involving the broader public, the winning questions addressed important problems that were not at the core of scientific research at that time, such as the mental health of children and adolescents. Similarly, citizens drew attention to the social dimensions of
health issues, asking not just how illnesses can be cured or managed
(the focus of prior research) but also how the social stigma of mental
illnesses can be reduced if a cure is not possible. Several of the proposed
research questions are now being investigated. The latest iteration of
this project focuses on traumatology research (Beck et al., 2019), and
the project title “Tell us” (Fig. 3) illustrates how the approach to ask
citizens for input in the problem definition stage goes well beyond the
traditional “deficit model” of science-society interactions, where problems are chosen by experts and solutions simply communicated to a
non-expert public (Irwin, 2014).
Third, and most closely aligned with the “democratization view” of
CS, citizens can take initiative without the leadership of professional
scientists. Callon and Rabeharisoa (2008) describe how a French patient organization concerned with muscular dystrophy initiated research by building a researcher community, providing funding for scientists, building dedicated research infrastructure, and getting directly
involved in research projects. Similarly, the Catalan Mental Health
Federation, which unites people with mental health problems and their
relatives, encouraged a group of scientists to join in a CS project to
study and support community-care approaches in a participatory
manner (Cigarini et al., 2018). Finally, the Ringland Academy, a think
tank within the Ringland citizen movement, promoted research on
traffic-related emissions by initiating the project “CurieuzeNeuzen”,
which systematically measured air quality in the Belgian city of
3.2. Resource mobilization
Sustainability transitions require significant human and financial
resources for scientific research and technological development but also
for the socio-political processes that are an integral part of transitions
(Hekkert et al., 2007). These resource requirements are evident in
9
By drawing attention to particular sustainability problems, CS may also
draw attention to sustainability problems in general (vs. problems of purely
scientific interest). It appears that the latter typically operates via the former, so
we focus on the former.
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Fig. 3. Poster for “Tell us” project to crowdsource research questions in science. Source: https://ois.lbg.ac.at/en/methods-projects/cris.
examples such as the transformation of Dutch water management, the
development of alternative energy sources, or the re-configuration of
personal transportation systems (Fagerberg, 2018; Geels, 2002; Van der
Brugge et al., 2005). However, the high uncertainty and complexity
associated with STs can discourage the necessary investment, preventing research from being done or constraining the emergence of
technical solutions beyond experimental niches (Geels, 2002, 2006).
We suggest that Citizen Science can support sustainability transitions by mobilizing resources. First, as highlighted by the “productivity
view” of CS, large numbers of contributors can provide human effort
that speeds up research or enables large-scale projects that would be
difficult to perform with the resources available in the traditional scientific system. For example, participants on the Citizen Science platform Zooniverse have contributed effort valued at millions of dollars
towards research on astronomy, medicine, and climate change by
classifying images (Sauermann and Franzoni, 2015). CS projects are
particularly effective in collecting large amounts of observational data
across space and time. The Cornell Lab of Ornithology, for example, has
developed a portfolio of highly successful Citizen Science projects that
involve over 400,000 participants. These projects have contributed data
for over 150 scientific papers on topics such as changes in bird migration patterns, the impact of non-native species, biological diversity,
and climate change.10 We already mentioned the CurieuzeNeuzen
project, which was able to collect very detailed air quality information
that allowed climate scientists to validate and improve existing computer models (see Fig. 4).
Second, while many studies focus on participants’ contributions of
effort, citizens can also contribute unique technical skills and knowledge. As shown in prior innovation research, a diversity of knowledge
inputs tends to increase the quality of solutions, and broadcasting
problems to a wide range of people increases the chance of finding
someone who has the required skills or insights (Jeppesen and
Lakhani, 2010). An example is the project Foldit, which used citizens’
spatial capabilities to solve the structure of enzymes that are critical for
the reproduction of the AIDS virus and to improve traditional computer
algorithms for predicting the molecular structure of proteins
(Khatib et al., 2011). In another example, the platform InnoCentive
broadcast a call for solutions to help clean up remaining pollution from
the Exxon Valdez oil spill. The winning solution came from John Davis,
10
who drew on his experience in the concrete industry to come up with a
creative solution to prevent the freezing of oil in arctic waters
(Innocentive, 2007).
In the context of sustainability transitions, citizens can also contribute another type of knowledge: Knowledge about socio-political
conditions that are relevant for understanding and addressing sustainability problems. Among others, citizens involved in research may
identify challenges with respect to the social acceptance of solutions
and may draw greater attention to potential adverse impacts of new
scientific knowledge and technologies. This can enable projects to proactively address some of those concerns, resulting in more responsible
and socially robust innovation (Boon et al., 2011; Nowotny, 2003;
Stilgoe et al., 2013). Consider the example of academic scientists who
sought to address the problem of overgrazing on the Greek island of
Samothraki (Petridis et al., 2017). Close collaboration with local
farmers allowed the scientists to study the biological aspects of overgrazing. More importantly, it helped them understand the underlying
economic incentives and constraints the farmers faced. As a result, the
project devised solutions that addressed not only technical but also
social aspects of the problem. Prior research on crowdsourcing and user
innovation suggests that the rich contextual knowledge citizens have
about problems and potential solutions is often “sticky”, i.e., hidden
from professional scientists and difficult to transfer (Ottinger, 2010;
Poetz and Schreier, 2012; Von Hippel, 1994). As such, direct involvement of citizens in research and innovation is often necessary to take
advantage of this knowledge.
This discussion yields an important insight about Citizen Science in
the particular context of sustainability transitions: Citizens will often be
more than anonymous suppliers of labor or ideas; their personal experiences and backgrounds matter, and their preferences and assumptions can shape the process of research and the solutions that emerge
(Parrish et al., 2019). Some CS projects minimize such influences by
standardizing processes and limiting citizens’ contributions to small
micro-tasks. To create knowledge that can address socio-technical
sustainability problems, however, projects will often have to acknowledge and embrace such influences, while recognizing potential goal
conflicts and biases. We will expand upon this challenge in Section 4
below.
The pathway of resource mobilization described in this section
likely interacts with problem identification and agenda setting (see
Section 3.1). For one, the experiential knowledge resources that citizens
contribute affect how problems are framed and how visions for
http://www.birds.cornell.edu/page.aspx?pid=1664
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Fig. 4. Map of Antwerp showing participation in CurieuzeNeuzen project as well as key results. Each colored dot represents the mean nitrogen dioxide concentration
at a measuring location in May 2016. Source: https://curieuzeneuzen.be/in-english/.
solutions are developed. Moreover, stakeholders who contribute more
resources likely have a greater influence in the political processes that
shape agenda setting. Indeed, organizations such as the CurieuzeNeuzen project or the French Association of Muscular Dystrophy
Patients mentioned above were arguably able to influence the direction
of research precisely because they brought their own resources to bear,
which made them less dependent on other stakeholders. Finally, citizens will be more willing to contribute time and other resources to
projects that align with their interests or that promise to address their
own problems (Geoghegan et al., 2016; Sauermann and
Franzoni, 2013).11 As such, citizen involvement in problem identification and agenda setting may also increase resource mobilization for
other aspects of transition processes.12
Moreover, transitions often depend on supportive policies such as regulations and subsidies (Geels and Schot, 2007; Smith et al., 2010).
Importantly, socio-technical transitions are not linear in the sense that
new technologies are first developed and then adopted; rather, technoscientific knowledge co-evolves with socio-political aspects
(Edmondson et al., 2019; Head, 2008; Loorbach et al., 2017). For example, complex technologies such as sewer systems or electric vehicles
are developed and refined over longer periods of time, whereby user
feedback as well as political and market processes intervene in the se2006;
lection
of alternative
technological paths (Geels,
Jørgensen, 2012). At the same time, demand becomes more clearly
articulated and users’ preferences are shaped as they interact with
emerging technical solutions. Similarly, the regulatory environment
changes as risks and opportunities resulting from solutions become
clearer (Rip, 1995).
Although the range of actors in sustainability transitions is wide,
citizens are often critical as buyers of technical solutions, adopters of
more sustainable practices and behaviors, and voters who influence
regulators and policy makers (Mowery et al., 2010; Smith et al., 2005).
As such, we argue that Citizen Science can support STs by increasing
the alignment between techno-scientific and socio-political aspects and
by facilitating their co-evolution.
First, our discussion in the prior sections suggests that citizen participation in setting research agendas and performing research will
result in better solutions, whereby the quality of solutions reflects their
ability to address technical aspects of sustainability problems, but also
their alignment with the socio-political environment. Better solutions,
in turn, will be more likely to receive support and diffuse. Consider
again the Samothraki CS project on overgrazing, which resulted in a
socio-technical solution that farmers found worth adopting
(Petridis et al., 2017).
Second, in addition to shaping what solutions emerge, Citizen
3.3. Facilitating socio-technical co-evolution
Sustainability transitions such as those towards renewable energy,
efficient transportation systems, or sustainable agricultural methods
involve new techno-scientific solutions but also social elements
(Mowery et al., 2010; Patterson et al., 2017). In particular, they require
changes in norms, values, and behaviors, including the adoption of
solutions by actors such as consumers and firms (Smith et al., 2005).
11
When asked in our survey about potential participation in CS, several
MTurk respondents made statements such as: “It depends on the project. If I am
passionate about it, then I'm more likely to be involved.”
12
Although our focus in this section is on resource mobilization, CS may also
increase the efficiency with which available resources are used. In particular, to
the extent that CS projects promote transparency in research processes as well
as broad access to data and research outputs, duplication of effort can be
avoided and collective research output can be increased (Franzoni and
Sauermann, 2014; Vohland and Göbel, 2017).
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Science can lead to changes in participants’ knowledge and attitudes. In
particular, participation in research can build awareness and allow citizens to gain a clearer understanding of sustainability problems
(Brossard et al., 2005). This is particularly valuable in areas where
problems are abstract (e.g., biodiversity loss), intangible (global
warming) or invisible (nuclear radiation). Participation in research can
also increase citizens’ familiarity with particular subjects and enable
them to better assess the merits and risks of techno-scientific solutions
(Ball et al., 2014; Jordan et al., 2011).
Increased awareness and learning, in turn, may change behaviors.
For one, participants who gain awareness of sustainability problems are
often more motivated to help solve them (Crall et al., 2012;
Toomey and Domroese, 2013). An example is the German project ReparaKultur, which created repair cafés and brought together citizens
and social scientists to reflect on their relationships with consumer
products. Partly as a result of increased awareness of sustainability
problems related to overconsumption, this project led to changes in
participants’ patterns of purchasing and re-use (Hielscher and JaegerErben, 2019). Relatedly, citizens who have personally contributed to
solutions and who have in the process learned about their scientific
rationale may be more likely to adopt them.
Third, greater awareness of problems, a better understanding of
socio-technical solutions, as well as a personal stake in those solutions
can lead citizens to push for complementary changes through interactions with policy makers or other stakeholders (Kythreotis et al., 2019).
CS can be particularly effective in the latter respect if it allows citizens
to produce scientific evidence on sustainability problems or solutions.
For example, a recent German CS project documenting a dramatic drop
in insect biomass has attracted global attention (Hallmann et al., 2017;
McGrane, 2017) and exerted policy pressure that may well exceed the
pressure created by an extensive report on pollinators by the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem
Services (Potts et al., 2016). Such influence is reinforced by a shift in
the policy community towards accepting new modes of public participation including Citizen Science (Kuhlmann and Rip, 2018).
The CurieuzeNeuzen project illustrates several of the mechanisms
discussed in this section (Van Brussel and Huyse, 2018). This project
involved almost 2000 residents in measuring air quality across the city
of Antwerp. In addition to receiving valuable data, the organizers also
documented changes in participants’ awareness of pollution problems
and in attitudes towards public policies and infrastructure projects.
Moreover, participants reported in a post-project survey plans to
change their own behaviors, including using cars less frequently and
approaching government officials about air quality problems. This
project drew national media attention that increased its impact beyond
project participants. Potential “coalition partners” (Smith et al., 2005)
such as politicians supporting more sustainable modes of transportation
publicly endorsed the project, and the data and scientific results have
been considered in local policy decisions.13 Of course, this project also
reminds us of the political nature of CS in the context of sustainability
transitions: By stimulating research on particular problems such as air
pollution, projects can deflect attention of citizens and policy makers
from other problems (e.g., poverty reduction).14 Moreover, the solutions that are developed to address a focal problem may have negative
implications for some external stakeholders (e.g., people living outside
the city and relying on their cars to commute to work).
How does the potential role of Citizen Science differ from that of
other mechanisms to increase science-society interactions, including
“public engagement with science”, “public understanding of science”,
and “science communication” (Felt and Fochler, 2008; Jasanoff, 2003;
Stilgoe et al., 2014)? While there are many overlaps, we argue that CS
differs because it involves citizens in the actual production of scientific
knowledge rather than just informing and educating about this production or its results. As such, it provides greater potential for citizens
to shape and improve solutions, supporting the co-evolution of social
and technical aspects. Moreover, active participation is “experiential”,
with greater opportunities for learning (Kolb and Kolb, 2005). The direct collaboration between professional scientists and citizens also
fosters closer personal relationships that enable deeper understanding
(Felt and Fochler, 2008). Finally, participation in different stages of the
research process – including the formulation of research questions –
likely creates stronger ownership of problems and potential solutions
(Geoghegan et al., 2016), which can motivate citizens to advocate for
broader socio-political changes. This discussion highlights connections
between this third pathway and the two we discussed earlier: CS can
facilitate the co-evolution of techno-scientific and socio-political aspects partly because citizens get involved in identifying sustainability
problems and setting research agendas (pathway 1) and because they
contribute to research with their time, effort, and experiential knowledge resources (pathway 2). At the same time, participants’ assessments
of the degree to which socio-technical alignment is (not) being achieved
may feed back into agenda setting and resource mobilization activities
(see Fig. 2).
4. Challenges
Section 3 identified considerable opportunities for Citizen Science to
support sustainability transitions. To realize this potential, however, CS
needs to overcome a number of challenges. Just like the opportunities,
these challenges relate to a large extent to the fact that STs are of a
socio-technical nature, and that supporting them requires the integration of two quite different “views” of Citizen Science. The three challenges we highlight in the following flow from our discussion of opportunities, while also reflecting prior research on Citizen Science and
extensive discussions with project leaders and participants (see
Section 1). Table 2 summarizes the challenges and identifies connections with the three pathways identified in Section 3.
4.1. Increasing the diversity, level, and intensity of participation
4.1.1. The importance of participation
Our discussion thus far was based on the premise that projects involve citizens from diverse parts of society (e.g., with respect to socioeconomic status, race, and gender) who make contributions that are
significant in volume and sustained over time. The diversity of participants is relevant for all three pathways: When citizens get involved in
identifying problems and setting research agendas, their identity will
shape what projects are pursued. If participants are not diverse and
representative of the broader population, research agendas will reflect
primarily the preferences and assumptions of those who participate
rather than society at large, contrary to the premise of the “democratization view” of CS (English et al., 2018; May et al., 2014). Diversity
among participants is also likely to increase the diversity in knowledge
resources and thus creativity in generating problem solutions, as well as
the alignment between technical and social aspects (Cigarini et al.,
2018; Horwitz and Horwitz, 2007). Finally, diversity in participation
will generate broader benefits in terms of learning and buy-in and may
thus contribute to the wider diffusion of emerging solutions and complementary socio-political changes.
A high level of participation – in terms of the number of participants,
13
The AIRbezen project uses a different technology to measure air quality
and had roughly 10,000 participants in 2017. Project findings were used by the
Belgian senate in a report on policy measures for improving air quality (see
www.airbezen.be).
14
Research is needed on whether and how CS efforts in one domain “crowd
out” efforts in other domains (for some evidence on interdependencies between
individual projects see Sauermann and Franzoni, 2013). Up to a certain point,
there may be positive spillovers in that successful projects legitimize and draw
attention to CS in general. To the extent that attention of citizens and policy
makers is limited, however, increasing activity in one domain may ultimately
reduce activity in others.
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Table 2
Potential challenges for Citizen Science in supporting sustainability transitions.
Challenge
Increasing participation (diversity;
level; intensity)
Relevance for agenda setting
Reducing tensions between CS and the
institution of academic science
(autonomy vs. control;
performance metrics)
Relevance for socio-technical co-evolution
of diversity leads to solutions that
of diversity limits knowledge
of diversity among participants limits
• Lack
• Lack
• Lack
fail to align technical and social elements
variety and thus the potential for
the range of sustainability problems that
•
Addressing the social as well as
technical nature of sustainability
transitions (diverse research
topics; scientific and non-scientific
project goals)
Relevance for resource mobilization
level and intensity of
• Low
participation limit the volume of
range of research
• Narrow
questions and project goals limits
limited range of research questions and fail
to address interactions between social and
technical elements.
Perceived trade-offs may lead to the
exclusion of “secondary” non-scientific
project goals that are important for
transitions.
the interest of the broader public
and thus resource mobilization.
with citizens when setting research
agendas.
Narrow academic performance metrics
prevent scientists from pursuing social
impact outcomes that are long-term,
uncertain, and difficult to measure.
•
as distinct from their diversity – is also important. Large numbers of
participants may have a greater weight in political processes associated
with problem identification and agenda setting. Large volumes of
contributions increase the chances of generating valuable knowledge
and solutions, and such benefits of scale exist across a broad range of
activities including both data collection and analysis as well as creative
tasks and problem solving (Sauermann and Franzoni, 2015;
Simonton, 2003). Finally, the more people participate in Citizen Science projects, the more widespread can be the benefits of learning,
potentially resulting in increased motivation to adopt emerging solutions and advocate for complementary socio-political changes
(Kythreotis et al., 2019; Ruckart et al., 2019).
Third, the pathways we identified likely benefit from a high intensity
of participation, i.e., the extent to which given citizens are involved in a
project at a point in time and such involvement is sustained over time.
Although intensive participation is not required to collect initial ideas
regarding sustainability problems or potential solutions (Beck et al.,
2019), deeper involvement is likely beneficial for citizens to bring to
bear their tacit experiential knowledge and preferences when framing
problems or creating shared visions about possible futures (Felt and
Fochler, 2008; Head, 2008). Sustained participation over time is required for certain types of knowledge contributions such as longitudinal
observational data and is also beneficial for citizen learning (RuizMallén et al., 2016).
•
broader public, thus the motivation and
ability to adopt emerging solutions and
advocate for socio-political changes.
Solutions that only address technical
aspects of sustainability problems are
less likely to emerge beyond
experimental niches.
non-scientific project outcomes are
trade-offs between
• Ifignored,
• Unresolved
socio-political and technoproject goals (e.g., between citizen
of scientific autonomy deter
• Norms
•
professional scientists from sharing control
•
level and intensity of participation
• Low
limit learning and awareness in the
effort and knowledge resources
mobilized for CS projects.
perspectives (e.g.,
• Single-disciplinary
natural vs. social sciences) focus on a
•
(e.g., fail to consider the constraints of
economically disadvantaged citizens).
innovative solutions.
are addressed (e.g., biodiversity vs.
poverty) and limits the “democratizing”
potential of CS in agenda setting.
Low level and intensity of participation
limit the weight of CS initiatives in the
politics of agenda setting.
learning and knowledge
production) lead to inefficient
resource utilization.
Concerns about external influence
reduce scientists’ willingness to
rely on citizens’ effort and
knowledge resources.
Narrow performance metrics lead
scientists to ignore potential
contributions that do not translate
into scientific productivity.
scientific aspects of sustainability
transitions fail to co-evolve.
of control limits citizens’ ability to
• Lack
shape solutions and their motivation to
advocate for socio-political changes.
performance metrics
• Traditional
promote the “productivity view” of CS,
failing to facilitate the co-evolution of
social aspects.
sustainability or health, but few address sustainable development goals
such as “no poverty” or “zero hunger”.
Several factors may shape current participation patterns. With respect to the diversity of participants, projects led by professional scientists often make limited efforts to reach underrepresented groups and
instead rely on self-selection and individuals’ intrinsic motivation to
participate (Raddick et al., 2013). Even if projects are initiated by citizens, participants tend to represent selected groups that have a strong
interest in a particular topic or sustainability problem
(McCormick, 2007; Ottinger, 2010). To some extent, this may reflect
that recruiting efforts targeted at individuals who are predisposed towards science (e.g., at science fairs) or who care about particular problems are more successful than efforts to draw in participants from
other strata of society. But under-representation may also reflect important constraints certain individuals face. In particular, even though
new digital platforms and portable technologies such as smartphonebased measurement tools can enable greater participation, they are not
universally accessible and can pose barriers for individuals with lower
levels of income and education, or for older individuals who experience
difficulties operating new technologies (West and Pateman, 2016). Similarly, time commitments for CS may be difficult to make by individuals in certain life stages and socioeconomic groups, such as parents with young children or individuals working multiple jobs.15
With respect to the level and intensity of participation, some projects struggle to attract participants and keep them engaged because
they are too demanding in terms of skills or subject-related knowledge
(Crowston and Fagnot, 2008). Limited participation can also reflect low
interest and motivation, e.g., because participants see no personal relation to a scientific problem (Bela et al., 2016). Moreover, initial
4.1.2. Current participation patterns
Many Citizen Science projects fail to attract enough participants,
participants tend to engage with projects only briefly, and even successful projects rely on a small share of contributors who do most of the
work (Dickinson and Bonney, 2012; Sauermann and Franzoni, 2015).
Projects also often do not involve a representative cross-section of society: They tend to attract individuals with higher levels of education
and pre-existing interest in science (Raddick et al., 2013; Van Brussel
and Huyse, 2018), older, white, educated men (Ganzevoort et al.,
2017), or middle-aged white persons with above average income
(Geoghegan et al., 2016; Haklay, 2015). Indeed, this lack of diversity
may partly explain why many CS projects focus on environmental
15
When asked about reasons (not) to participate in CS, one MTurk respondent commented: „I am disabled and only have a limited amount of energy
every day to spend on silly things like showering, taking care of my fosters etc.
so I would have to gauge the pro and con carefully... If I could even be valuable.” Another: “If I have time and find one that's interesting I'll participate, but
right now I just need to make sure I can keep my lights on and food on the
table.”
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motivation often decreases over time as the novelty of Citizen Science
participation fades, or as opportunities for learning and discovery seem
to decline (Sauermann and Franzoni, 2013; West and Pateman, 2016).
discussions of the institution of science and of Citizen Science do draw
these distinctions. At the same time, the prominence of these distinctions especially among professional scientists – as evidenced, for example, in the disciplinary organization of academic departments – may
exacerbate some of the challenges we are about to discuss.
4.1.3. Potential mechanisms to increase participation
Emerging evidence points towards promising approaches to increase participation. For example, studies suggest that people are more
engaged in projects when they receive clear guidelines how to use
simple methods within a well-defined time-frame (Couvet and
Prevot, 2015; Hyder et al., 2017). Projects also attract more contributors when benefits to participants are integrated into the project
design (Senabre et al., 2018; Shirk et al., 2012). The motivation to
participate tends to be high when projects address concrete sustainability problems such as air pollution in a specific location (e.g.,
Van Brussel and Huyse, 2018), or in domains with high levels of hobbyist interest such as ornithology and astronomy. Alternatively, some
projects have increased participation by “gamifying” less interesting
tasks (Eveleigh et al., 2013). Other projects have been able to maintain
and even increase individuals’ engagement over time by offering “career ladders” that start with easy tasks but allow participants to move to
more complex tasks with higher responsibility. On the platform Zooniverse, for example, this includes tasks such as moderating a discussion
forum or helping resolve disagreements over images that are difficult to
classify (Jackson et al., 2016).
Projects can seek to increase diversity by reducing barriers posed by
expensive technologies, e.g., by lending out camera traps through
public libraries16 or by allowing participants to send data through
smartphone apps as well as postal mail. Moreover, projects can make
efforts to reach out to under-represented populations with relatively
simple means, e.g., by considering diversity when selecting promotional pictures of participants for brochures and project websites
(West and Pateman, 2016).
Despite these promising mechanisms, there are also potential tradeoffs between different aspects of participation. For example, simplifying
tasks and lowering skill and time requirements may attract more participants but can reduce their intensity of engagement (Hackman and
Oldham, 1976). Similarly, the (online) project infrastructure required
to enable large-scale participation likely limits opportunities for personal interactions and learning, potentially reducing the intensity of
engagement. Finally, efforts to increase diversity by reaching out to
populations that do not naturally self-select (e.g., those with lower interest in science or lower income) will be costly and likely yield a lower
number of participants as well as lower intensity of engagement. To the
extent that these trade-offs are difficult to resolve, organizers may have
to prioritize aspects of participation depending on the nature of the
scientific problem and in light of non-scientific project goals (see next
section).
4.2.1. Investigating technical as well as social aspects of sustainability
problems
Sustainability problems have multiple causes that cut across academic disciplines, requiring corresponding breadth in the issues that
are studied. Similarly, citizens can contribute knowledge about technoscientific aspects (e.g., data on bird locations or air quality) but also
knowledge about socio-political aspects of problems (Nowotny, 2003;
Smith et al., 2005). As such, both technical and social aspects need to be
considered when framing sustainability problems and setting research
agendas, and when integrating citizens’ resources.
Although Citizen Science provides the opportunity to integrate research on natural and social phenomena (Crain et al., 2014), CS projects
often pursue either technical or social topics, partly reflecting the disciplinary backgrounds and interests of academic project organizers.
Moreover, attention is unbalanced: Citizen Science is gaining traction
quite rapidly in the natural sciences, while adoption among social scientists – and thus attention to social aspects of sustainability transitions
– remains limited (Crain et al., 2014; Kullenberg and
Kasperowski, 2016). The reasons for the latter are likely multi-faceted,
including a longer history of citizen involvement in studying the natural
environment than in studying social processes, greater agreement on
research questions and methods in the natural sciences, as well as fewer
concerns regarding data protection and research ethics (Heiss and
Matthes, 2017). Despite these challenges, multi-disciplinary collaborations between scientists as well as citizens can succeed in addressing
sustainability problems. For example, joint leadership of the Samothraki Citizen Science project by environmental and social scientists
was partly responsible for its ability to design effective solutions
(Petridis et al., 2017).
4.2.2. Pursuing scientific as well as non-scientific project goals
The socio-technical nature of STs requires attention to scientific
outcomes but also non-scientific goals such as learning and advocacy. In
particular, we argued in Section 3 that citizens’ learning about sustainability problems and about the research process can allow them to
make greater contributions to knowledge generation, while also fostering the co-evolution of socio-political aspects. However, the evidence
on learning outcomes is mixed (Groulx et al., 2017). On the one hand,
research shows that project participation can increase citizens’ topical
knowledge and awareness of the ecosystem (Mueller et al., 2012;
Senabre et al., 2018). On the other hand, evidence regarding the effects
on participants’ attitudes or learning about the scientific process is inconclusive, with some studies finding benefits (Ballard et al., 2017;
Cronje et al., 2011) and others finding no changes (Brossard et al.,
2005; Crall et al., 2012; Jordan et al., 2011).
There are several potential reasons for limited participant learning.
One relates to the observation that many citizens participate in projects
only with low intensity (see Section 4.1); this limited engagement is
unlikely to provide the depth of exposure to science and the rich interactions with professional scientists that may be most useful in stimulating mutual learning. Another is that many project organizers,
especially those subscribing to the “productivity view”, focus on scientific outputs of CS and pay little attention to learning goals
(Bela et al., 2016; Groulx et al., 2017). But even projects that make
serious efforts to accomplish learning goals may use methods that turn
out to be ineffective. For example, organizers of the Chicago Area
Pollinator Study handed out a highly researched and colloquially
written information sheet to educate participants about different types
of bees. After the observed improvements in knowledge failed to meet
organizers’ expectations, they conjectured that interactive blogs and
4.2. Addressing the socio-technical nature of sustainability transitions
The socio-technical nature of sustainability transitions creates unique opportunities for Citizen Science (discussed in Section 3), but also
challenges. In the following, we will first discuss the challenge to include both technical and social aspects as topics of CS investigations,
followed by the challenge to pursue both scientific and non-scientific
project goals. We then consider the potential role of project governance
in addressing both challenges. We note that some readers, especially
those who study socio-technical transitions or who subscribe to the
“democratization view” of CS, may argue that distinctions between
social and technical aspects, or between scientific and non-scientific
project goals are misleading since these aspects should not be separated. To the extent that we use terminology that implies such distinctions, we do so for analytical purposes and because many
16
http://www.nccandidcritters.org
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and involved them in co-designing mechanisms to support their own
learning. Although systematic evaluations of CS co-design approaches
are lacking, we conjecture that co-design has benefits not only in terms
of a greater ability to address socio-technical aspects of sustainability
transitions, but may also help address the first challenge discussed
earlier: Broadening participation and increasing the motivation of citizens to contribute their effort and knowledge resources (English et al.,
2018).
Of course, even co-design will not resolve all trade-offs between
project goals, and the framing of projects may remain contested between different groups of participants. To the extent that there are
strong trade-offs that are difficult to reconcile within a given project,
multiple goals might be accomplished across different projects. For
example, while some Citizen Science projects may treat the scientific
work merely as a setting to accomplish experiential learning, others
may focus on the scientific outcomes and de-emphasize learning.
Collectively, these projects could still support STs through the different
pathways depicted in Fig. 2.
personal feedback on participants’ submissions of specimens might
have been a more effective approach (Druschke and Seltzer, 2012).
The Chicago Area Pollinator Study highlights the more general issue
that there are often difficult trade-offs between scientific and educational goals. In particular, the organizers had to recognize that the work
required to process large amounts of submissions left them little time to
provide mentoring and personalized learning experiences to participants (Druschke and Seltzer, 2012). Similarly, many CS projects use
relatively rigid protocols and automated processes in order to accommodate large numbers of participants and to ensure the quality of data
and results. Such standardized processes may reduce participants’ opportunities to ask questions or engage actively with project leaders,
limiting learning opportunities. On the other hand, scientific and educational goals can also be synergistic. For example, achieving learning
goals can increase participants’ ability to make higher quality scientific
contributions to a project, potentially increasing scientific output
(Parrish et al., 2019). Similarly, citizen learning can increase motivation and thus the volume of contributions (Geoghegan et al., 2016).
Trade-offs may also exist between scientific and advocacy goals.
One concern is that activists who seek to promote a particular cause
may participate in CS projects primarily to generate data supporting
their case and may have little interest in publishing results in the peerreviewed literature, or to critically assess the validity of results that
happen to support their case. Participants who do not like particular
project findings may even steer activity in other directions or selectively challenge scientific points on political grounds (Jasanoff, 2003;
Lewandowsky et al., 2016). As a result, scientific results may be compromised. This trade-off may be mitigated, however, to the extent that
scientifically valid results are seen as more convincing by policy makers
and skeptics, ultimately increasing a project's effectiveness also with
respect to advocacy. Future research is needed on the presence and
magnitude of goal trade-offs and on mechanisms that allow projects to
better accomplish scientific as well as non-scientific goals.
4.3. Understanding and reducing tensions with traditional academic science
Our discussion of goal conflicts and project governance leads us to a
final challenge: Tensions between Citizen Science and traditional academic science. In the following, we focus on two aspects that are particularly salient in the context of sustainability transitions: Tensions
between the norm of professional scientific autonomy and the influence
of non-professional citizens, and tensions between narrow performance
metrics of academic institutions and the multi-dimensional objectives of
CS.
4.3.1. Scientific autonomy vs. external influence
In the ideal-type view of academic science, researchers have autonomy in pursuing questions that they deem relevant in order to close
knowledge gaps and advance the field (Jasanoff, 2003; Merton, 1973).
As such, the arbiters of the value of research questions are expert scientists as well as their professional peers as reviewers of grant proposals
and publications. Freedom from external control has been argued to be
essential for the progress of science because external actors such as the
state may have biased interests, lack the scientific expertise to assess the
importance of research questions, or do not see the long-term benefits
of curiosity-driven basic research (Bush, 1945; Nelson, 2004;
Stokes, 1997). In an alternative interpretation, the scientific elite may
insist on autonomy primarily to maintain control over material resources (Gieryn, 1983). Either way, the emphasis on autonomy goes
along with a strong belief in the importance of formal education and in
scientists’ ability to steer the path of science for society's long-term
benefit.
Citizen Science creates a tension with this postulate of scientific
autonomy in that opening up projects to the public relinquishes control
to non-professionals (Loorbach et al., 2017). This is clearest when citizens get directly involved in defining research questions and setting
research agendas. However, researchers also give up control when relying on volunteers in contributory projects: Projects may fail to attract
enough contributors (see Section 4.1), effectively giving citizens a vote
on whether or not a project proceeds.17 This transfer of control is
central to the “democratization view” of Citizen Science, based on the
4.2.3. The role of project governance
The foregoing discussion raises the fundamental question of who
defines CS project topics as well as goals and operational structures. At
the moment, many projects are initiated and led by professional scientists working in academic environments (Bio Innovation
Service, 2018; Science Europe, 2018). This raises the concern that
professional scientists may frame projects primarily in terms of traditional disciplinary boundaries (e.g., natural vs. social sciences) and
focus on productivity in terms of knowledge production rather than
learning or socio-technical alignment. At the same time, common assumptions about professional scientists may be too simplistic: Although
publications and scientific credit are important, scientists also have
other motives, including social impact, sharing the passion for research
with others, education, and even advocacy (Cohen et al., forthcoming;
Collins and Pinch, 2012; Grundmann, 2013; Turrini et al., 2018).
Moreover, scientists differ with respect to their values and interests
(Sauermann and Roach, 2014), and those who lead CS projects are
likely the ones who place greater value on social impact or science
education (Druschke and Seltzer, 2012; Petridis et al., 2017). Nevertheless, it is likely that exclusive leadership by professional scientists
makes it more difficult for projects to bridge disciplinary boundaries or
to address both scientific and non-scientific goals.
To the extent that professional scientists and citizens bring different
substantive perspectives as well as goals to the table, the perhaps most
promising approach to better address the socio-technical nature of
sustainability problems is the co-creation of projects. As per our discussion in Section 2, co-created projects involve citizens and professional scientists in all stages of the research, including the formulation
of research questions as well as the design of experiments and project
infrastructure. Ruiz-Mallén et al. (2016) demonstrate potential benefits
of this approach by showing significant participant learning in a project
that allowed citizens to identify research questions they found relevant
17
More subtly, scientists also give up control when allowing citizens’
knowledge contributions to shape the direction of research. When asked about
perceived challenges for CS, one MTurk respondent commented: “I think the
biggest problem is professional scientists rejecting the discoveries made by citizens or hobbyists. Way too often, if a theory does not fit what a scientist has
been taught by academia, the idea is dismissed without any further investigation, thereby losing decades of advancement that could have been made instead.”
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implicit assumptions that citizens are better able to identify important
problems for research than professional scientists and that the “votes”
that are cast in this process reflect the needs of the broader public.
However, many professional scientists do not share these assumptions
(Simis et al., 2016), which partly explains the limited acceptance of CS
among academics (Burgess et al., 2017; Golumbic et al., 2017) and is
also reflected in derogatory notions such as “panda bear science”
(Siva, 2014).18
The tension between scientific autonomy and influence from
broader society is not new. Although professional science aspires to
autonomy in theory, it has always depended on resource flows from the
public, which exerts control over the general direction of research
through higher-level directives from policy makers and funding agencies (Hackett, 1990; Merton, 1973). What appears to be new is that
Citizen Science entails more direct and targeted influence, exerted not
by elected officials or administrators but by citizens or interest groups
at the level of individual projects. As such, CS creates a more decentralized, but perhaps also more politicized way through which the
public shapes the direction of science.
This aspect of decentralization also points to a potential way in
which the tension can be resolved: Not at the level of the overall system,
but at the level of individual scientists and projects. In particular,
professional scientists can choose whether they want to expose themselves to external influences by adopting Citizen Science approaches,
and how much control they want to share with citizens (e.g., by participating in co-created vs. contributory projects). There is heterogeneity across scientists with respect to their concerns about autonomy
and their willingness to learn from citizens, and some will get involved
in CS while others will not (Geoghegan et al., 2016; Golumbic et al.,
2017). Indeed, case studies suggest that many scientists who currently
collaborate with citizens appreciate the interactions exactly because
they change their own thinking and guide research towards greater
socio-technical alignment (Petridis et al., 2017). Whether selection at
the level of individual scientists will be sufficient for Citizen Science to
have a significant impact on sustainability transitions partly depends on
the number of professionals who are willing to share control with citizens. We are not aware of quantitative studies on this question, but
there is evidence that openness towards citizen involvement is greater
in the young generation of scientists (Golumbic et al., 2017;
Sauermann et al., 2019), suggesting that attitudes may shift over time.
potential to support socio-technical sustainability transitions (Fig. 2).
For CS to support transitions, professional scientists therefore likely
face what a prominent report described as the trade-off between “career
work” and “engagement work” (European Science Foundation, 2013).
There is little research studying academic institutions’ responses
specifically to Citizen Science initiatives, no less how such responses
change over time. However, there is work on related developments such
as academics’ interactions with outside stakeholders as part of
Responsible Research and Innovation (RRI) initiatives (Ribeiro et al.,
2018; Von Schomberg, 2013) as well as academia-industry collaborations and academic entrepreneurship (Bercovitz and Feldman, 2008;
Perkmann et al., 2013). CS differs from these mechanisms in important
ways, such as the focus on individual citizens as partners (vs. firms or
other stakeholders) as well as the direct participation of non-professionals in the research process (vs. consultation and responsiveness to
outside interests). However, these mechanisms also share similarities in
that they cross traditional academia-society boundaries, involve tradeoffs in terms of time spent on producing traditional research outputs vs.
engaging with outsiders, and raise concerns regarding goal conflicts.
Research on these other external engagement mechanisms suggests
that they have been accompanied by broadening performance standards within academia: Although publications remain the primary
measure of success, universities now also value social impact and have
added related criteria to tenure and promotion guidelines (Cohen et al.,
forthcoming). This development is partly driven by universities’ hope
that broader impacts have financial payoffs, e.g., in the form of patent
royalties or funding from sponsored research (Perkmann et al., 2013).
But it is also a response to demands from funders and other external
stakeholders who need to justify public support for academic research
(Krainer and Winiwarter, 2016). Indeed, funding agencies are also
imposing such changes directly, e.g., by incorporating “broader impacts” in grant evaluation criteria (Davis and Laas, 2014).
It is too early to tell whether similar changes will help resolve the
tension between academic performance metrics and non-scientific goals
of Citizen Science projects. To some extent, scientists may be able to
frame CS as one approach to generate the broader impact that is increasingly being expected by their employers. Moreover, some external
stakeholders actively encourage Citizen Science, such as the European
Union through funding programs directed at studying and using CS
(SwafS, 2017). On the other hand, Citizen Science for sustainability
may be more difficult to legitimize and incorporate into academic incentive systems than other external engagement mechanisms because it
involves a greater loss of professional autonomy, which is likely to be
resisted (see Section 4.3.1). Perhaps more importantly, its broader
impacts are difficult to measure and document due to the complex,
uncertain, and long-term nature of socio-technical transitions, as well as
the important role of subjective value judgments (Section 3.1).
4.3.2. Narrow performance metrics of academic institutions
A second tension arises if academic employers prioritize scientific
knowledge codified in peer-reviewed publications but Citizen Science
projects reduce scientists’ publication productivity due to time spent on
other goals such as education or advocacy. The topics that are most
likely to yield top-tier publications may also not be the same topics that
promise the greatest contributions to solving sustainability problems.
Of course, scientific and non-scientific goals may at times be complementary (see Section 4.2), and engaging with real world problems
can also result in higher-impact publications (see Kline and
Rosenberg, 2010). Moreover, scientists will have less of a problem reconciling CS with their academic environment if they adopt a “productivity view” rather than a “democratization view” since the former
is consistent with currently dominant performance metrics (Table 1).
However, a focus on productivity alone would limit Citizen Science's
5. Discussion
Citizen Science is receiving increasing attention from scientists and
policy makers. Although much has been written about the opportunities
and challenges of CS in general, our novel contribution is to evaluate its
potential in one very important domain: Addressing sustainability
problems such as reducing poverty, improving health, and preserving
the natural environment.19 Our discussion suggests that Citizen Science
can indeed make important contributions to sustainability transitions
because it is uniquely able to address some central features of STs such
as their socio-technical nature, large resource requirements, but also
the important role of value judgments and politics. At the same time, CS
faces important challenges that need to be addressed. We conclude by
offering some critical reflections, highlighting opportunities for future
18
Even though CS transfers control from professional scientists to citizens, it
may also enable individual scientists to pursue ideas for which the professional
system does not provide sufficient resources. Consider the example of Jacquelyn
Gill of the University of Maine, who lacked the funding for her project on the
climate history of the Falkland Islands. She was able to perform this work by
raising the required resources from citizens on the crowdfunding platform experiment.com. Results from this project then also convinced a traditional
agency to fund follow-on work (Dolgin, 2019).
19
Fritz et al. (2019) make a related effort by discussing more specifically how
CS can help monitor sustainability goals.
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research, and considering implications for selected stakeholders.
interdependencies between elements. As such, while most existing research focuses on the level of individual CS projects, future work should
also consider the role of portfolios and how efforts might be coordinated across complementary projects. This will be especially important in the context of sustainability problems, which involve research needs that are large in both scale and scope.20
Third, future work should study the development of Citizen Science
in light of advances in research tools and equipment. In particular, the
capabilities of artificial intelligence (AI) and robotics are increasing
rapidly, and many of the research tasks that used to require large
amounts of human labor and intelligence can now be automated. This
applies most clearly to work on digital objects such as classifying
images, but also to data collection, problem solving, and even the
identification of research questions (Fortson et al., 2012; Sparkes et al.,
2010).21 As such, one may ask how much longer we will “need” Citizen
Science. The answer partly depends on whether one sees the potential
of CS narrowly in light of the “productivity view”. We argued that the
potential of Citizen Science in STs goes beyond increasing productivity,
and it seems that new research technologies such as AI have limited
potential to replace CS with respect to the three pathways discussed in
Section 3. However, the increasing use of research technologies to increase efficiency may limit opportunities for citizens to engage in science and thus for non-scientific benefits to materialize. Thus, future
work is needed on the interactions between CS and research technologies (as both enablers and substitutes), and how these interactions are
shaped by project goals and overarching rationales for citizen participation in research.
5.1. Critical reflections and future research
Our discussion of opportunities and challenges focused on projects
that involve both citizens and professional scientists; as such, we did
not discuss explicitly the potential contributions of traditional academic
science (which excludes citizens), but we also did not consider in depth
the potential of autonomous or bottom-up CS (which excludes professional scientists). We chose this focus because in the context of sociotechnical transitions, we see the greatest opportunities and challenges
precisely due to the collaboration between stakeholders with different
capabilities, knowledge bases, and preferences. Indeed, we outlined in
the beginning two extreme “views” of Citizen Science (featuring scientists and citizens as primary actors, respectively) and many of our
core arguments emerged from the integration of these two views. That
said, there may be distinct opportunities as well as challenges from
autonomous CS that deserve future research.
In order to focus on the intersection between Citizen Science and
sustainability transitions, we set aside several interesting issues raised
in the literatures on which we draw. Among others, there are other
important features of STs that we did not address, such as their multilevel nature, the presence of tipping points, or the role of a broader
range of stakeholders (Loorbach et al., 2017; Rip, 1995). Similarly, we
did not highlight other important issues in the study of Citizen Science
such as project infrastructure (e.g., offline vs. online) or the role of
context-dependent perceptions regarding the quality of scientific outcomes (Aceves-Bueno et al., 2017; Burgess et al., 2017). Although we
do not believe that these other features change our key arguments,
considering them in future work might yield a more nuanced and
deeper understanding of the potential role of CS in STs.
Our discussion was driven by conceptual arguments relating core
features of sustainability transitions to the two views of Citizen Science,
but we also substantiated our arguments with empirical evidence drawn
from prior research, case studies, our own CS experiences, and discussions with citizens and CS leaders. Some of this evidence is strong, including both large-scale quantitative studies and rich qualitative work
on underlying mechanisms. Other evidence is only suggestive, and
several of our arguments require empirical validation in future work. As
such, we already pointed out several opportunities for future research
throughout the paper. We now highlight three broader cross-cutting
directions for future research on CS that seem particularly relevant in
the context of sustainability transitions.
First, much of the prior literature focuses on the distinction between
professional scientists and citizens. Future research is needed on the
heterogeneity among citizens as well as among professional scientists:
How do the objectives of citizens differ, and what political processes
come into play as different groups seek to steer science towards their
particular needs (Ribeiro et al., 2018)? How do different groups of citizens interact and collaborate within given projects, and how does
diversity of participation relate to the quality of socio-technical solutions (Horwitz and Horwitz, 2007)? What are professional scientists’
attitudes towards CS and STs, and which scientists select into using CS
approaches? How can projects benefit from the leadership of professional scientists with different backgrounds, including the natural as
well as the social sciences?
Second, the opportunities but also challenges for Citizen Science in
sustainability transitions partly reflect that CS can be many things:
Citizens can identify but also solve problems, they can provide effort as
well as knowledge, and they can help address technical as well as social
aspects of problems. An important question is whether these different
aspects need to be realized within individual projects or whether they
can be accomplished across a portfolio of different projects. While addressing aspects separately in different projects may help avoid some of
the trade-offs and tensions we discussed (e.g., between scientific and
educational goals), such a separation may also fail to address
5.2. Implications for key actors
The link between Citizen Science and sustainability transitions is
not automatic. Instead, CS initiatives need to explicitly consider the
nature of socio-technical transitions and leverage the pathways discussed in Section 3, while addressing the challenges raised in Section 4.
We end by briefly noting implications for important actors such as citizens, professional scientists, administrators, as well as policy makers
and funding agencies.22
First, citizens and professional scientists should reflect on their respective goals in CS projects and consider the benefits of integrating the
“productivity” and “democratization” views. By discussing their goals
and corresponding personal roles with each other, scientists and citizens may identify opportunities for their projects to have impacts beyond those originally intended. In a sense, this reinforces a point made
earlier, namely that co-created projects have a particularly high potential to support sustainability transitions (Section 4.2.3). Of course,
this also requires changes in norms and behaviors: Professional scientists need to share more control with citizens, consider non-scientific
project goals, and explore the benefits of interdisciplinary approaches.
At the same time, citizens need to accept additional responsibilities and
may have to invest more time and effort than in typical contributory CS
projects.
Academic administrators and peer evaluators need to recognize that
the broader impact of CS cannot be fully captured in traditional performance metrics, and they should adjust reward systems to reduce the
tensions discussed in Section 4.3.2. Administrators and educators can
20
Emerging cross-project platforms such as EU-Citizen.Science seek to
mainstream CS in science and policy and also provide an opportunity to foster
and study interactions among projects.
21
Of course, some tasks will not be automated in the foreseeable future.
Moreover, artificial and human intelligence may also be complementary, e.g.,
when human-collected data are used to train algorithms or when algorithms
increase the efficiency and quality of crowdsourcing (Keshavan et al., 2019).
22
These implications assume that sustainability transitions tend to be beneficial and desirable. We recognize that this assumption may not be universally
shared (see also Section 3.1 on the politics of STs).
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also foster CS for sustainability transitions by incorporating relevant
aspects in the training and socialization of future generations of professional scientists. A more systematic educational approach may be
needed given the significant changes that are required with respect to
scientists’ attitudes but also their skills and competences to engage in
collaborations with citizens (O'Carroll et al., 2017). Such training could
build upon – but needs to go beyond – current efforts related to science
communication.23
Policy makers and funding agencies should further encourage and
support CS efforts, especially projects that are co-created to address
sustainability problems. Supporting such projects is important because
they are less likely to fit into the “productivity view” of academic institutions and may be less likely to emerge without external support.
Moreover, such projects can be costlier to run, especially if they seek to
reach a diverse range of citizens (see Section 4.1). Of course, policy
makers and funding agencies need to be sensitive to the concerns and
reservations on the part of professional scientists, while embracing their
ability to shape and influence the academic system as important external stakeholders and resource providers.
Finally, we also see an important implication for our scholarly
community. As discussed in Section 2, most of the current work on
Citizen Science in fields such as the natural sciences, economics, or
science and technology studies is rooted in one of the two views (productivity or democratization), emphasizing particular goals and mechanisms over others. Although such focused efforts yield important
insights, they fail to appreciate the interdependencies between social
and technical aspects and may result in recommendations that limit the
potential of CS. As such, we call for greater interdisciplinary efforts that
recognize and build upon different views to better understand Citizen
Science and to provide guidance for practitioners and policy makers. Of
course, the present article reflects our own limited attempt at such an
integration.
throughout Europe”. BB received funding from the InSpires project, EU
Horizon 2020 grant No 741677. JP was partially supported by
MINEICO (Spain), Agencia Estatal de Investigación (AEI) and Fondo
Europeo de Desarrollo Regional (FEDER) through grant FIS201678904-C3-2-P.
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CRediT authorship contribution statement
Henry Sauermann: Conceptualization, Writing - original draft,
Writing - review & editing. Katrin Vohland: Conceptualization,
Writing - original draft, Writing - review & editing, Funding acquisition.
Vyron Antoniou: Conceptualization, Writing - original draft, Writing review & editing. Bálint Balázs: Conceptualization, Writing - original
draft, Writing - review & editing. Claudia Göbel: Conceptualization,
Writing - original draft, Writing - review & editing, Funding acquisition.
Kostas Karatzas: Conceptualization, Writing - original draft, Writing review & editing. Peter Mooney: Conceptualization, Writing - original
draft, Writing - review & editing. Josep Perelló: Conceptualization,
Writing - original draft, Writing - review & editing. Marisa Ponti:
Conceptualization, Writing - original draft, Writing - review & editing,
Funding acquisition. Roeland Samson: Conceptualization, Writing original draft, Writing - review & editing. Silvia Winter:
Conceptualization, Writing - original draft, Writing - review & editing.
Declaration of Competing Interest
The authors declare that they have no known competing financial
interests or personal relationships that could have appeared to influence the work reported in this paper.
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