Perception of partly occluded objects in schizophrenic patients.
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概要
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In drawing tests, schizophrenic patients could depict objects separately and in isolation, but not partly occluded objects. This finding may suggest that schizophrenic patients do not perceive partly occluded objects. To investigate this possibility, by means of Kanizsa's figures, 30 schizophrenic patients and 50 normal subjects were examined on how they perceive partly occluded objects. Only two schizophrenic patients perceived all stimuli as mosaics. The others perceived presented objects as completed behind another occluding object. The most frequent perceptual completions were based on the principle of 'good continuity' in schizophrenics, and on that of symmetry in normal subjects. This suggests that schizophrenic patients primarily process parts of an object rather than a whole object as normal subjects do. The principle of 'good continuity' thus appears to operate on more localized information than does the principle of symmetry in the test patterns in this experiment.
- 公益社団法人 日本心理学会の論文