Journal of Psychological Issues in Organizational Culture, 2010
The goal of this study was to ascertain the level of PTSD symptoms experienced by Special Forces ... more The goal of this study was to ascertain the level of PTSD symptoms experienced by Special Forces Operators (SFOs) who have been exposed to combat and compare these rates to the PTSD rates of the general U.S. population and general military population. A secondary goal was to discover whether SFOs were aware that therapy was available to them through the U.S. Army and, if so, whether they would seek this therapy for PTSD. The last goal was to discover whether SFOs who chose not to seek therapy while still serving did so because they feared negative consequences. Data were collected from 68 SFOs who had been exposed to combat. Results indicated that SFOs are experiencing symptoms of PTSD at a rate that is higher than that of the general U.S. population and somewhat lower than that of the general military population. Also, results indicated that a large percentage of the sample would not seek treatment for PTSD due to perceived negative consequences.
Previous studies have indicated that the formation of coherent patterns for multielement motion d... more Previous studies have indicated that the formation of coherent patterns for multielement motion displays depends onglobal cooperative interactions among large ensembles of spatially distributed motion detectors. These interactions enhance certain motion directions and suppress others. It is reported here that perceiving one element moving between two nearby locations likewise is subject to cooperative influences (possibly facilitating and inhibiting interactions within alocal ensemble of overlapping detectors). Thresholds depending on luminance contrast were measured for a generalized singleelement apparent-motion stimulus, and evidence for spontaneous switching and hysteresis effects indicated that motion perception near the 50% threshold was bistable. That is, for conditions in which motion and nonmotion were perceived half the time, the two percepts were distinct; when one was perceived, it clearly was discriminable from the other. These results indicated that (1) single-element apparent-motion thresholds depended on the immediately preceding state of the ensemble of motion detectors responding to the stimulus, and (2) the stimulus activation of individual motion detectors always might be influenced by recurrent, cooperative interactions resulting from the detectors’ being embedded within interconnected ensembles.
Journal of Psychological Issues in Organizational Culture, 2010
The goal of this study was to ascertain the level of PTSD symptoms experienced by Special Forces ... more The goal of this study was to ascertain the level of PTSD symptoms experienced by Special Forces Operators (SFOs) who have been exposed to combat and compare these rates to the PTSD rates of the general U.S. population and general military population. A secondary goal was to discover whether SFOs were aware that therapy was available to them through the U.S. Army and, if so, whether they would seek this therapy for PTSD. The last goal was to discover whether SFOs who chose not to seek therapy while still serving did so because they feared negative consequences. Data were collected from 68 SFOs who had been exposed to combat. Results indicated that SFOs are experiencing symptoms of PTSD at a rate that is higher than that of the general U.S. population and somewhat lower than that of the general military population. Also, results indicated that a large percentage of the sample would not seek treatment for PTSD due to perceived negative consequences.
Previous studies have indicated that the formation of coherent patterns for multielement motion d... more Previous studies have indicated that the formation of coherent patterns for multielement motion displays depends onglobal cooperative interactions among large ensembles of spatially distributed motion detectors. These interactions enhance certain motion directions and suppress others. It is reported here that perceiving one element moving between two nearby locations likewise is subject to cooperative influences (possibly facilitating and inhibiting interactions within alocal ensemble of overlapping detectors). Thresholds depending on luminance contrast were measured for a generalized singleelement apparent-motion stimulus, and evidence for spontaneous switching and hysteresis effects indicated that motion perception near the 50% threshold was bistable. That is, for conditions in which motion and nonmotion were perceived half the time, the two percepts were distinct; when one was perceived, it clearly was discriminable from the other. These results indicated that (1) single-element apparent-motion thresholds depended on the immediately preceding state of the ensemble of motion detectors responding to the stimulus, and (2) the stimulus activation of individual motion detectors always might be influenced by recurrent, cooperative interactions resulting from the detectors’ being embedded within interconnected ensembles.
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