Document Detail

Altered perception of apparent motion in schizophrenia spectrum disorder.
MedLine Citation:
PMID:  18471894     Owner:  NLM     Status:  MEDLINE    
Apparent motion (AM), the Gestalt perception of motion in the absence of physical motion, was used to study perceptual organization and neurocognitive binding in schizophrenia. Associations between AM perception and psychopathology as well as meaningful subgroups were sought. Circular and stroboscopic AM stimuli were presented to 68 schizophrenia spectrum patients and healthy participants. Psychopathology was measured using the Positive and Negative Syndrome Scale (PANSS). Psychopathology was related to AM perception differentially: Positive and disorganization symptoms were linked to reduced gestalt stability; negative symptoms, excitement and depression had opposite regression weights. Dimensions of psychopathology thus have opposing effects on gestalt perception. It was generally found that AM perception was closely associated with psychopathology. No difference existed between patients and controls, but two latent classes were found. Class A members who had low levels of AM stability made up the majority of inpatients and control subjects; such participants were generally young and male, with short reaction times. Class B typically contained outpatients and some control subjects; participants in class B were older and showed longer reaction times. Hence AM perceptual dysfunctions are not specific for schizophrenia, yet AM may be a promising stage marker.
Wolfgang Tschacher; Priscilla Dubouloz; Rahel Meier; Uli Junghan
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-05-08
Journal Detail:
Title:  Psychiatry research     Volume:  159     ISSN:  0165-1781     ISO Abbreviation:  Psychiatry Res     Publication Date:  2008 Jun 
Date Detail:
Created Date:  2008-05-20     Completed Date:  2008-07-28     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7911385     Medline TA:  Psychiatry Res     Country:  Ireland    
Other Details:
Languages:  eng     Pagination:  290-9     Citation Subset:  IM    
University Hospital of Psychiatry, University of Bern, Laupenstrasse 49, CH-3010 Bern, Switzerland.
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MeSH Terms
Age Factors
Ambulatory Care
Biological Markers
Cognition Disorders / diagnosis,  physiopathology,  psychology
Control Groups
Form Perception / physiology
Gestalt Theory
Models, Neurological
Models, Psychological
Motion Perception* / physiology
Perceptual Disorders / diagnosis*,  physiopathology,  psychology
Photic Stimulation / methods
Psychiatric Status Rating Scales / statistics & numerical data
Psychomotor Performance / physiology
Reaction Time / physiology
Schizophrenia / diagnosis*,  physiopathology
Schizophrenic Psychology*
Sex Factors
Reg. No./Substance:
0/Biological Markers

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