Published online by Cambridge University Press: 16 April 2020
The hypothesis that paranoid and non-paranoid schizophrenics are differentially associated with unilateral hemisphere dysfunction was tested on 12 paranoid and 12 non-paranoid schizophrenics, as well as on 24 affective patients and 24 normal controls. The subjects were presented for 150 ms with series of digit-pairs and open rings to the left or right visual fields. Overall recognition of digits and localization of gaps in the rings were better for the right than for the left visual field. However, performance of the paranoid and non-paranoid schizophrenics was relatively poorer in response to the right and left visual field stimuli, respectively. Since these data do not correspond to the findings obtained in the auditory modality, they were interpreted as indicating modality-specific associations of paranoid schizophrenia with left hemisphere dysfunction, and of non-paranoid schizophrenia with right hemisphere dysfunction.
This paper is based on a thesis submitted by the first author to Bar-Ilan University in partial fulfilment of the requirements towards the MA degree. Part of the study was conducted while the third author was a visiting professor at the Department of Psychology, University of Toronto.
Present address: Long Island College Hospital, Brooklyn, New York.
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