Journal
CLINICAL PSYCHOLOGICAL SCIENCE
Volume 1, Issue 1, Pages 5-15Publisher
SAGE PUBLICATIONS INC
DOI: 10.1177/2167702612464618
Keywords
schizophrenia; center-surround; contextual effects; perception deficit; visual processing
Categories
Funding
- National Alliance for Research on Schizophrenia and Depression
- National Institutes of Health [MH073028, EY007135, EY001319, EY007125, EY019295]
- National Institute of Child Health and Human Development [P30 HD15052]
- World Class University Program through the Korea Science and Engineering Foundation - Ministry of Education, Science and Technology [R31-10089]
- EUNICE KENNEDY SHRIVER NATIONAL INSTITUTE OF CHILD HEALTH & HUMAN DEVELOPMENT [P30HD015052] Funding Source: NIH RePORTER
- NATIONAL EYE INSTITUTE [T32EY007135, P30EY001319, R01EY019295, T32EY007125] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF MENTAL HEALTH [R01MH073028] Funding Source: NIH RePORTER
Ask authors/readers for more resources
Abnormal perceptual experiences are central to schizophrenia, but the nature of these anomalies remains undetermined. We investigated contextual processing abnormalities across a comprehensive set of visual tasks. For perception of luminance, size, contrast, orientation, and motion, we quantified the degree to which the surrounding visual context altered a center stimulus's appearance. Healthy participants showed robust contextual effects across all tasks, as evidenced by pronounced misperceptions of center stimuli. Schizophrenia patients exhibited intact contextual modulations of luminance and size but showed weakened contextual modulations of contrast, performing more accurately than controls. Strong motion and orientation context effects correlated with worse symptoms and social functioning. Importantly, the overall strength of contextual modulation across tasks did not differ between controls and schizophrenia patients. In addition, performance measures across contextual tasks were uncorrelated, implying discrete underlying processes. These findings reveal that abnormal contextual modulation in schizophrenia is selective, arguing against the proposed unitary contextual processing dysfunction.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available