The 20-item Obsessive-Compulsive Trait Core Dimensions Questionnaire (OCTCDQ) assesses two motiva... more The 20-item Obsessive-Compulsive Trait Core Dimensions Questionnaire (OCTCDQ) assesses two motivational dimensions of OCD, harm avoidance and incompleteness. Psychometric properties and construct validity of a German version were examined in 202 patients with OCD. A shortened and statistically optimized version was developed on the basis of a structural equation modelling approach. As a confirmatory factor analysis showed a poor model fit for the German translation, the model was revised. The resulting 10-item version (OCTCDQ-R) showed a good fit. Internal consistency is excellent for incompleteness and satisfactory for harm avoidance. Relationships with OCD symptom severity, anxiety, worry and obsessive-compulsive personality traits support the construct validity. The OCTCDQ-R is a reliable and valid measure to assess the individual significance of incompleteness and harm avoidance in OCD patients.
Zusammenfassung Hintergrund: Effektivitätsstudien zur Behandlung von Zwangsstörungen unter klinis... more Zusammenfassung Hintergrund: Effektivitätsstudien zur Behandlung von Zwangsstörungen unter klinischen Routineversorgungsbedingungen sind im ambulanten und stationären Bereich bisher rar. Multimorbide, bereits vorbehandelte Patienten werden in randomisierten, kontrollierten Studien (RCTs) meist ausgeschlossen. In der vorliegenden Studie wurde untersucht, ob sich durch stationäre kognitive Verhaltenstherapie (KVT) in einer wenig selektierten Stichprobe unter alltäglichen Routinebedingungen gleich hohe Effekte erzielen lassen wie in RCTs und
Incompleteness (INC) and harm avoidance (HA) are motivational core dimensions of OCD. While HA-re... more Incompleteness (INC) and harm avoidance (HA) are motivational core dimensions of OCD. While HA-related concepts (e.g., inflated responsibility, overestimation of threat) are a main focus of current cognitive-behavioural OCD research, there is also a renewed interest in INC feelings and "not just right experiences" with an inability to achieve "closure" concerning actions/perceptions. This study systematically examines the association of OCD symptom dimensions with INC and HA in a large clinical OCD sample (n=202). Hierarchical linear multiple regression analyses controlling for anxiety, depression and symptom severity demonstrated a unique association of symmetry/ordering and checking (but not of contamination/washing and obsessional thoughts) with INC, and of obsessional thoughts and checking with HA. Thus, in contrast with symmetry/ordering (predominantly INC-related) and obsessional thoughts (predominantly HA-related), checking was motivationally heterogeneous, i.e., associated with INC and HA to a comparable and substantial degree. Contamination/washing failed to show a unique association with HA in two of three analyses, and with INC in all three analyses. Symptom severity uniquely contributed to INC in two of three analyses, but not to HA. Clinically, our results indicate that a conceptualization of OCD as an anxiety disorder is too narrow.
ZusammenfassungHintergrund: Zwangspatienten werden im klinischen Alltag häufig fehldiagnostiziert... more ZusammenfassungHintergrund: Zwangspatienten werden im klinischen Alltag häufig fehldiagnostiziert und erhalten deswegen keine optimale psychotherapeutische Versorgung. Der diagnostische Nutzen mehrdimensionaler Zwangsinventare ist fraglich. Bisher wurde für keines der verbreiteten Verfahren untersucht, ob sich verschiedene Subgruppen von Zwangspatienten auf korrespondierenden Subskalen von Gesunden unterscheiden. Die diagnostische Genauigkeit (Sensitivität und Spezifität) von Zwangsinventaren wird üblicherweise bestimmt, indem die Gesamtskalenwerte von heterogenen Zwangsstichproben und
This article reports on the integration and revision of two self-report measures of obsessive-com... more This article reports on the integration and revision of two self-report measures of obsessive-compulsive symptoms based on data from an obsessive-compulsive disorder (OCD) sample (n=228): the Vancouver Obsessional-Compulsive Inventory (VOCI) and the Symmetry Ordering and Arranging Questionnaire (SOAQ). The revised measure provides scores on five symptom subscales (Contamination, Checking, Hoarding, Symmetry and Ordering, Obsessions). It shows improvement upon current versions in several ways: it has a good model fit, eliminates redundancy, reduces overlap across subscales, is much shorter, and covers those OCD dimensions most frequently identified in factor-analytic studies. Strengths of the revision compared with other measures are high distinctiveness of subscales, discriminant validity with depression and anxiety, and a more fine-grained and comprehensive assessment of obsessional contents.
Zusammenfassung Hintergrund: Effektivitätsstudien zur Behandlung von Zwangsstörungen unter klinis... more Zusammenfassung Hintergrund: Effektivitätsstudien zur Behandlung von Zwangsstörungen unter klinischen Routineversorgungsbedingungen sind im ambulanten und stationären Bereich bisher rar. Multimorbide, bereits vorbehandelte Patienten werden in randomisierten, kontrollierten Studien (RCTs) meist ausgeschlossen. In der vorliegenden Studie wurde untersucht, ob sich durch stationäre kognitive Verhaltenstherapie (KVT) in einer wenig selektierten Stichprobe unter alltäglichen Routinebedingungen gleich hohe Effekte erzielen lassen wie in RCTs und
ZusammenfassungHintergrund: Zwangspatienten werden im klinischen Alltag häufig fehldiagnostiziert... more ZusammenfassungHintergrund: Zwangspatienten werden im klinischen Alltag häufig fehldiagnostiziert und erhalten deswegen keine optimale psychotherapeutische Versorgung. Der diagnostische Nutzen mehrdimensionaler Zwangsinventare ist fraglich. Bisher wurde für keines der verbreiteten Verfahren untersucht, ob sich verschiedene Subgruppen von Zwangspatienten auf korrespondierenden Subskalen von Gesunden unterscheiden. Die diagnostische Genauigkeit (Sensitivität und Spezifität) von Zwangsinventaren wird üblicherweise bestimmt, indem die Gesamtskalenwerte von heterogenen Zwangsstichproben und
The 20-item Obsessive-Compulsive Trait Core Dimensions Questionnaire (OCTCDQ) assesses two motiva... more The 20-item Obsessive-Compulsive Trait Core Dimensions Questionnaire (OCTCDQ) assesses two motivational dimensions of OCD, harm avoidance and incompleteness. Psychometric properties and construct validity of a German version were examined in 202 patients with OCD. A shortened and statistically optimized version was developed on the basis of a structural equation modelling approach. As a confirmatory factor analysis showed a poor model fit for the German translation, the model was revised. The resulting 10-item version (OCTCDQ-R) showed a good fit. Internal consistency is excellent for incompleteness and satisfactory for harm avoidance. Relationships with OCD symptom severity, anxiety, worry and obsessive-compulsive personality traits support the construct validity. The OCTCDQ-R is a reliable and valid measure to assess the individual significance of incompleteness and harm avoidance in OCD patients.
The English original version of the OCI-R is a brief, psychometrically sound scale measuring the ... more The English original version of the OCI-R is a brief, psychometrically sound scale measuring the major symptoms of patients with obsessive-compulsive disorder (OCD) on six dimensions: checking, washing, ordering, hoarding, obsessing and neutralizing. It has good convergent and discriminant validity and is sensitive to treatment effects. A German OCI-R version has not been examined until now. Reliability and validity of an authorized German version of the OCI-R were examined in a sample of 175 patients with OCD. The patients were diagnosed by experienced psychotherapists via an interview that utilized the International Diagnostic Checklists. Other measures for anxiety, worry, depression and perfectionism were used to determine convergent and discriminant validity. The full scale and five of six subscales had excellent internal consistency and "Neutralizing" had satisfactory internal consistency. A confirmatory factor analysis (SEM) replicated the original factor structure. All global fit indices suggested a good fit for the model. The local fit indices showed an excellent fit for 5 subscales and an acceptable fit for "neutralizing". The German version has good to excellent convergent validity and good divergent validity for the full scale and the subscales. The good results of the Foa et al.-study have been replicated in a German sample of patients with OCD. The German version of the OCI-R proved to be a reliable and valid self-report measure of obsessive-compulsive symptoms and appears to measure OCD quite independently from anxiety, worry, depression and perfectionism.
Journal of Psychopathology and Behavioral Assessment, 2009
ABSTRACT The extent to which the subscales of multidimensional OCD measures accurately distinguis... more ABSTRACT The extent to which the subscales of multidimensional OCD measures accurately distinguish patients with specific OCD main symptom domains from controls at different cutscores has not yet been examined. Diagnostic accuracy of OCD measures usually is determined by comparing the total scores of heterogeneous OCD samples and controls and therefore may underestimate the measures’ discrimination potential. In the current study, subtype-specific diagnostic accuracy and criterion-related validity of the Obsessive-Compulsive Inventory-Revised (OCI-R) subscales were examined in 327 patients with OCD, anxiety, and/or depressive disorders. All subscales demonstrated good to excellent criterion-related validity and diagnostic accuracy for distinguishing patients with specific OCD main symptom domains from controls. As expected, the single OCI-R subscales lead to more accurate diagnostic decisions than the total scale. Thus, the subscale-specific cutscores significantly improve the OCI-R’s utility for subtype-specific treatment planning and outcome measurement. Furthermore, an alternative classification algorithm distinguishing patients with OCD from controls based on subscale cutscores leads to a better sensitivity, but also to a lower specificity than discrimination based on the total scale cutscore.
This article reports on the integration and revision of two self-report measures of obsessive-com... more This article reports on the integration and revision of two self-report measures of obsessive-compulsive symptoms based on data from an obsessive-compulsive disorder (OCD) sample (n=228): the Vancouver Obsessional-Compulsive Inventory (VOCI) and the Symmetry Ordering and Arranging Questionnaire (SOAQ). The revised measure provides scores on five symptom subscales (Contamination, Checking, Hoarding, Symmetry and Ordering, Obsessions). It shows improvement upon current versions in several ways: it has a good model fit, eliminates redundancy, reduces overlap across subscales, is much shorter, and covers those OCD dimensions most frequently identified in factor-analytic studies. Strengths of the revision compared with other measures are high distinctiveness of subscales, discriminant validity with depression and anxiety, and a more fine-grained and comprehensive assessment of obsessional contents.
This paper examines the contribution of incompleteness/'n... more This paper examines the contribution of incompleteness/'not just right experiences' (NJREs) to an understanding of the relationship between obsessive-compulsive disorder (OCD) and obsessive-compulsive personality traits (OCPTs). It investigates the association of specific OCD symptom dimensions with OCPTs, conceptualized as continuous phenomena that are also observable below the diagnostic threshold. As empirical findings and clinical observation suggest that incompleteness feelings/NJREs may play a significant affective and motivational role for certain OCD subtypes, but also for patients with accentuated OCPTs, we hypothesized that OCPTs are selectively linked with incompleteness-associated OCD symptom dimensions (ordering, checking, hoarding and counting). Moreover, we assumed that this selective relationship cannot be demonstrated any more after statistical control of incompleteness, whereas it is preserved after statistical control of anxiety, depression, pathological worry and harm avoidance. Results from a study with a large clinical sample (n = 185) partially support these hypotheses and suggest that NJREs may be an important connecting link between specific OCD symptom dimensions, in particular ordering and checking, and accentuated OCPTs. Obsessive-compulsive personality traits (OCPTs) are positively related to obsessive-compulsive disorder symptom dimensions (ordering, checking, hoarding and counting) hypothesized or found to be associated with incompleteness/'not just right experiences' (NJREs), but not to washing and obsessions. This positive relationship, which is strongest for ordering and checking, is eliminated when NJREs are statistically controlled. Ordering, checking and accentuated OCPTs may share NJREs as a common affective-motivational underpinning.Dysfunctional behaviour patterns of people with accentuated OCPTs or obsessive-compulsive personality disorder (OCPD) may be viewed as efforts to avoid or reduce subjectively intolerable NJREs. On the basis of such a conceptualization of OCPD as an emotional disorder, a novel treatment approach for OCPD focusing on habituation to NJREs could be developed.
The purpose of the present study was to examine the psychometric properties, factorial structure,... more The purpose of the present study was to examine the psychometric properties, factorial structure, and validity of the Padua Inventory-Washington State University Revision and of the Padua Inventory-Revised in a large sample of patients with obsessive-compulsive disorder (n = 228) and with anxiety disorders and/or depression (n = 213). The five-factor structures of both revisions were not replicated. A 24-item revision, referred to as the Padua Inventory-Palatine Revision (PI-PR), was developed on the basis of both theoretical and statistical considerations. The PI-PR assesses six subscales: Contamination and Washing, Checking, Numbers, Dressing and Grooming, Rumination, and Harming Obsessions and Impulses. The results demonstrate that the PI-PR is a brief, psychometrically sound, and valid measure for the assessment of a broad range of obsessive-compulsive symptoms, which has important advantages over both previous revisions.
The 20-item Obsessive-Compulsive Trait Core Dimensions Questionnaire (OCTCDQ) assesses two motiva... more The 20-item Obsessive-Compulsive Trait Core Dimensions Questionnaire (OCTCDQ) assesses two motivational dimensions of OCD, harm avoidance and incompleteness. Psychometric properties and construct validity of a German version were examined in 202 patients with OCD. A shortened and statistically optimized version was developed on the basis of a structural equation modelling approach. As a confirmatory factor analysis showed a poor model fit for the German translation, the model was revised. The resulting 10-item version (OCTCDQ-R) showed a good fit. Internal consistency is excellent for incompleteness and satisfactory for harm avoidance. Relationships with OCD symptom severity, anxiety, worry and obsessive-compulsive personality traits support the construct validity. The OCTCDQ-R is a reliable and valid measure to assess the individual significance of incompleteness and harm avoidance in OCD patients.
Zusammenfassung Hintergrund: Effektivitätsstudien zur Behandlung von Zwangsstörungen unter klinis... more Zusammenfassung Hintergrund: Effektivitätsstudien zur Behandlung von Zwangsstörungen unter klinischen Routineversorgungsbedingungen sind im ambulanten und stationären Bereich bisher rar. Multimorbide, bereits vorbehandelte Patienten werden in randomisierten, kontrollierten Studien (RCTs) meist ausgeschlossen. In der vorliegenden Studie wurde untersucht, ob sich durch stationäre kognitive Verhaltenstherapie (KVT) in einer wenig selektierten Stichprobe unter alltäglichen Routinebedingungen gleich hohe Effekte erzielen lassen wie in RCTs und
Incompleteness (INC) and harm avoidance (HA) are motivational core dimensions of OCD. While HA-re... more Incompleteness (INC) and harm avoidance (HA) are motivational core dimensions of OCD. While HA-related concepts (e.g., inflated responsibility, overestimation of threat) are a main focus of current cognitive-behavioural OCD research, there is also a renewed interest in INC feelings and "not just right experiences" with an inability to achieve "closure" concerning actions/perceptions. This study systematically examines the association of OCD symptom dimensions with INC and HA in a large clinical OCD sample (n=202). Hierarchical linear multiple regression analyses controlling for anxiety, depression and symptom severity demonstrated a unique association of symmetry/ordering and checking (but not of contamination/washing and obsessional thoughts) with INC, and of obsessional thoughts and checking with HA. Thus, in contrast with symmetry/ordering (predominantly INC-related) and obsessional thoughts (predominantly HA-related), checking was motivationally heterogeneous, i.e., associated with INC and HA to a comparable and substantial degree. Contamination/washing failed to show a unique association with HA in two of three analyses, and with INC in all three analyses. Symptom severity uniquely contributed to INC in two of three analyses, but not to HA. Clinically, our results indicate that a conceptualization of OCD as an anxiety disorder is too narrow.
ZusammenfassungHintergrund: Zwangspatienten werden im klinischen Alltag häufig fehldiagnostiziert... more ZusammenfassungHintergrund: Zwangspatienten werden im klinischen Alltag häufig fehldiagnostiziert und erhalten deswegen keine optimale psychotherapeutische Versorgung. Der diagnostische Nutzen mehrdimensionaler Zwangsinventare ist fraglich. Bisher wurde für keines der verbreiteten Verfahren untersucht, ob sich verschiedene Subgruppen von Zwangspatienten auf korrespondierenden Subskalen von Gesunden unterscheiden. Die diagnostische Genauigkeit (Sensitivität und Spezifität) von Zwangsinventaren wird üblicherweise bestimmt, indem die Gesamtskalenwerte von heterogenen Zwangsstichproben und
This article reports on the integration and revision of two self-report measures of obsessive-com... more This article reports on the integration and revision of two self-report measures of obsessive-compulsive symptoms based on data from an obsessive-compulsive disorder (OCD) sample (n=228): the Vancouver Obsessional-Compulsive Inventory (VOCI) and the Symmetry Ordering and Arranging Questionnaire (SOAQ). The revised measure provides scores on five symptom subscales (Contamination, Checking, Hoarding, Symmetry and Ordering, Obsessions). It shows improvement upon current versions in several ways: it has a good model fit, eliminates redundancy, reduces overlap across subscales, is much shorter, and covers those OCD dimensions most frequently identified in factor-analytic studies. Strengths of the revision compared with other measures are high distinctiveness of subscales, discriminant validity with depression and anxiety, and a more fine-grained and comprehensive assessment of obsessional contents.
Zusammenfassung Hintergrund: Effektivitätsstudien zur Behandlung von Zwangsstörungen unter klinis... more Zusammenfassung Hintergrund: Effektivitätsstudien zur Behandlung von Zwangsstörungen unter klinischen Routineversorgungsbedingungen sind im ambulanten und stationären Bereich bisher rar. Multimorbide, bereits vorbehandelte Patienten werden in randomisierten, kontrollierten Studien (RCTs) meist ausgeschlossen. In der vorliegenden Studie wurde untersucht, ob sich durch stationäre kognitive Verhaltenstherapie (KVT) in einer wenig selektierten Stichprobe unter alltäglichen Routinebedingungen gleich hohe Effekte erzielen lassen wie in RCTs und
ZusammenfassungHintergrund: Zwangspatienten werden im klinischen Alltag häufig fehldiagnostiziert... more ZusammenfassungHintergrund: Zwangspatienten werden im klinischen Alltag häufig fehldiagnostiziert und erhalten deswegen keine optimale psychotherapeutische Versorgung. Der diagnostische Nutzen mehrdimensionaler Zwangsinventare ist fraglich. Bisher wurde für keines der verbreiteten Verfahren untersucht, ob sich verschiedene Subgruppen von Zwangspatienten auf korrespondierenden Subskalen von Gesunden unterscheiden. Die diagnostische Genauigkeit (Sensitivität und Spezifität) von Zwangsinventaren wird üblicherweise bestimmt, indem die Gesamtskalenwerte von heterogenen Zwangsstichproben und
The 20-item Obsessive-Compulsive Trait Core Dimensions Questionnaire (OCTCDQ) assesses two motiva... more The 20-item Obsessive-Compulsive Trait Core Dimensions Questionnaire (OCTCDQ) assesses two motivational dimensions of OCD, harm avoidance and incompleteness. Psychometric properties and construct validity of a German version were examined in 202 patients with OCD. A shortened and statistically optimized version was developed on the basis of a structural equation modelling approach. As a confirmatory factor analysis showed a poor model fit for the German translation, the model was revised. The resulting 10-item version (OCTCDQ-R) showed a good fit. Internal consistency is excellent for incompleteness and satisfactory for harm avoidance. Relationships with OCD symptom severity, anxiety, worry and obsessive-compulsive personality traits support the construct validity. The OCTCDQ-R is a reliable and valid measure to assess the individual significance of incompleteness and harm avoidance in OCD patients.
The English original version of the OCI-R is a brief, psychometrically sound scale measuring the ... more The English original version of the OCI-R is a brief, psychometrically sound scale measuring the major symptoms of patients with obsessive-compulsive disorder (OCD) on six dimensions: checking, washing, ordering, hoarding, obsessing and neutralizing. It has good convergent and discriminant validity and is sensitive to treatment effects. A German OCI-R version has not been examined until now. Reliability and validity of an authorized German version of the OCI-R were examined in a sample of 175 patients with OCD. The patients were diagnosed by experienced psychotherapists via an interview that utilized the International Diagnostic Checklists. Other measures for anxiety, worry, depression and perfectionism were used to determine convergent and discriminant validity. The full scale and five of six subscales had excellent internal consistency and "Neutralizing" had satisfactory internal consistency. A confirmatory factor analysis (SEM) replicated the original factor structure. All global fit indices suggested a good fit for the model. The local fit indices showed an excellent fit for 5 subscales and an acceptable fit for "neutralizing". The German version has good to excellent convergent validity and good divergent validity for the full scale and the subscales. The good results of the Foa et al.-study have been replicated in a German sample of patients with OCD. The German version of the OCI-R proved to be a reliable and valid self-report measure of obsessive-compulsive symptoms and appears to measure OCD quite independently from anxiety, worry, depression and perfectionism.
Journal of Psychopathology and Behavioral Assessment, 2009
ABSTRACT The extent to which the subscales of multidimensional OCD measures accurately distinguis... more ABSTRACT The extent to which the subscales of multidimensional OCD measures accurately distinguish patients with specific OCD main symptom domains from controls at different cutscores has not yet been examined. Diagnostic accuracy of OCD measures usually is determined by comparing the total scores of heterogeneous OCD samples and controls and therefore may underestimate the measures’ discrimination potential. In the current study, subtype-specific diagnostic accuracy and criterion-related validity of the Obsessive-Compulsive Inventory-Revised (OCI-R) subscales were examined in 327 patients with OCD, anxiety, and/or depressive disorders. All subscales demonstrated good to excellent criterion-related validity and diagnostic accuracy for distinguishing patients with specific OCD main symptom domains from controls. As expected, the single OCI-R subscales lead to more accurate diagnostic decisions than the total scale. Thus, the subscale-specific cutscores significantly improve the OCI-R’s utility for subtype-specific treatment planning and outcome measurement. Furthermore, an alternative classification algorithm distinguishing patients with OCD from controls based on subscale cutscores leads to a better sensitivity, but also to a lower specificity than discrimination based on the total scale cutscore.
This article reports on the integration and revision of two self-report measures of obsessive-com... more This article reports on the integration and revision of two self-report measures of obsessive-compulsive symptoms based on data from an obsessive-compulsive disorder (OCD) sample (n=228): the Vancouver Obsessional-Compulsive Inventory (VOCI) and the Symmetry Ordering and Arranging Questionnaire (SOAQ). The revised measure provides scores on five symptom subscales (Contamination, Checking, Hoarding, Symmetry and Ordering, Obsessions). It shows improvement upon current versions in several ways: it has a good model fit, eliminates redundancy, reduces overlap across subscales, is much shorter, and covers those OCD dimensions most frequently identified in factor-analytic studies. Strengths of the revision compared with other measures are high distinctiveness of subscales, discriminant validity with depression and anxiety, and a more fine-grained and comprehensive assessment of obsessional contents.
This paper examines the contribution of incompleteness/'n... more This paper examines the contribution of incompleteness/'not just right experiences' (NJREs) to an understanding of the relationship between obsessive-compulsive disorder (OCD) and obsessive-compulsive personality traits (OCPTs). It investigates the association of specific OCD symptom dimensions with OCPTs, conceptualized as continuous phenomena that are also observable below the diagnostic threshold. As empirical findings and clinical observation suggest that incompleteness feelings/NJREs may play a significant affective and motivational role for certain OCD subtypes, but also for patients with accentuated OCPTs, we hypothesized that OCPTs are selectively linked with incompleteness-associated OCD symptom dimensions (ordering, checking, hoarding and counting). Moreover, we assumed that this selective relationship cannot be demonstrated any more after statistical control of incompleteness, whereas it is preserved after statistical control of anxiety, depression, pathological worry and harm avoidance. Results from a study with a large clinical sample (n = 185) partially support these hypotheses and suggest that NJREs may be an important connecting link between specific OCD symptom dimensions, in particular ordering and checking, and accentuated OCPTs. Obsessive-compulsive personality traits (OCPTs) are positively related to obsessive-compulsive disorder symptom dimensions (ordering, checking, hoarding and counting) hypothesized or found to be associated with incompleteness/'not just right experiences' (NJREs), but not to washing and obsessions. This positive relationship, which is strongest for ordering and checking, is eliminated when NJREs are statistically controlled. Ordering, checking and accentuated OCPTs may share NJREs as a common affective-motivational underpinning.Dysfunctional behaviour patterns of people with accentuated OCPTs or obsessive-compulsive personality disorder (OCPD) may be viewed as efforts to avoid or reduce subjectively intolerable NJREs. On the basis of such a conceptualization of OCPD as an emotional disorder, a novel treatment approach for OCPD focusing on habituation to NJREs could be developed.
The purpose of the present study was to examine the psychometric properties, factorial structure,... more The purpose of the present study was to examine the psychometric properties, factorial structure, and validity of the Padua Inventory-Washington State University Revision and of the Padua Inventory-Revised in a large sample of patients with obsessive-compulsive disorder (n = 228) and with anxiety disorders and/or depression (n = 213). The five-factor structures of both revisions were not replicated. A 24-item revision, referred to as the Padua Inventory-Palatine Revision (PI-PR), was developed on the basis of both theoretical and statistical considerations. The PI-PR assesses six subscales: Contamination and Washing, Checking, Numbers, Dressing and Grooming, Rumination, and Harming Obsessions and Impulses. The results demonstrate that the PI-PR is a brief, psychometrically sound, and valid measure for the assessment of a broad range of obsessive-compulsive symptoms, which has important advantages over both previous revisions.
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