PMID: 9727965Sep 4, 1998Paper

Illusory conjunctions and perceptual grouping in a visual search task in schizophrenia

Psychiatry Research
V J CarrT J Lewin

Abstract

This report describes part of a series of experiments, conducted within the framework of feature integration theory, to determine whether patients with schizophrenia show deficits in preattentive processing. Thirty subjects with a DSM-III-R diagnosis of schizophrenia and 30 age-, gender-, and education-matched normal control subjects completed two computerized experimental tasks, a visual search task assessing the frequency of illusory conjunctions (i.e. false perceptions) under conditions of divided attention (Experiment 3) and a task which examined the effects of perceptual grouping on illusory conjunctions (Experiment 4). We also assessed current symptomatology and its relationship to task performance. Contrary to our hypotheses, schizophrenia subjects did not show higher rates of illusory conjunctions, and the influence of perceptual grouping on the frequency of illusory conjunctions was similar for schizophrenia and control subjects. Nonetheless, specific predictions from feature integration theory about the impact of different target types (Experiment 3) and perceptual groups (Experiment 4) on the likelihood of forming an illusory conjunction were strongly supported, thereby confirming the integrity of the experimental pr...Continue Reading

References

Oct 1, 1978·The Journal of Nervous and Mental Disease·M D Cox, D B Leventhal
Nov 15, 1991·Biological Psychiatry·A M ShelleyN McConaghy
Mar 1, 1990·Schizophrenia Research·B D SchwartzD K Winstead
Apr 1, 1988·Biological Psychiatry·B D SchwartzD K Winstead
May 1, 1988·The Quarterly Journal of Experimental Psychology. A, Human Experimental Psychology·A M Treisman
Mar 1, 1986·RDH·M K Lassen
Jan 1, 1986·Schizophrenia Bulletin·K H NuechterleinM E Dawson
May 1, 1984·Journal of Abnormal Psychology·D S Wells, D B Leventhal
Jan 1, 1982·Cognitive Psychology·A Treisman, H Schmidt
Oct 1, 1981·Perception & Psychophysics·W Prinzmetal
Jan 1, 1980·Cognitive Psychology·A M Treisman, G Gelade
Jun 1, 1980·Journal of Abnormal Psychology·E J Place, G C Gilmore
May 1, 1995·Archives of General Psychiatry·N C AndreasenM Flaum
Jan 1, 1994·Acta Psychiatrica Scandinavica. Supplementum·K H NuechterleinM F Green
Dec 1, 1994·Schizophrenia Research·K LiebR Hess
Aug 15, 1998·Psychiatry Research·V J CarrT J Lewin

Citations

Feb 26, 2008·European Archives of Psychiatry and Clinical Neuroscience·Maya RoinishviliMichael H Herzog
Aug 8, 2002·Schizophrenia Research·Claude AlainRobert B Zipursky
Jul 4, 2009·Journal of the International Neuropsychological Society : JINS·David LuckJ M Danion
Sep 14, 2011·Neuropsychobiology·Chisako IkedaHeii Arai
Feb 10, 2009·Journal of Cognitive Neuroscience·Ralph WeidnerGereon R Fink
Apr 3, 2007·Psychiatry Research·Susan M RavizzaRuth E Salo

Related Concepts

Mental Concentration
Cognition
Optical Illusions
Pattern Recognition, Visual
Schizophrenic Psychology
Visual Perception

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