Shape constancy in schizophrenic patients

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Shape constancy in visual perception of schizophrenic patients was studied. 40 chronic schizophrenic, 40 acute schizophrenic, 40 nonschizophrenic mental patients, and 40 normal controls were used as Ss. Ss matched the shape of a standard object (circle) inclined at an angle. 2 angles of inclination, 30° and 60°, were used. It was found that shape constancy was lower in schizophrenic patients than in controls when the stimulus object was inclined 60° from the horizontal plane. When the angle of inclination was 30° there was no difference between the groups. The chronic schizophrenic patients displayed greater response variability than the other groups. The relation of these findings to the theory of assimilation of percepts to the perceptual schemata in schizophrenic patients was discussed. (23 ref.) (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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