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Forward and Backward Visual Masking of Contour by Light in Positive- and Negative-Symptom Schizophrenia


Slaghuis, WL and Bakker, VJ, Forward and Backward Visual Masking of Contour by Light in Positive- and Negative-Symptom Schizophrenia, Journal of Abnormal Psychology, 104, (1) pp. 41-54. ISSN 0021-843X (1995) [Refereed Article]

DOI: doi:10.1037/0021-843X.104.1.41


Forward and backward masking of contour by light was investigated with stimulus onset asynchronies from 20 to 180 ms in a group of 22 schizophrenic patients and 22 matched normal controls. Individuals with schizophrenia were selected using American Psychiatric Association (1987) criteria and were also assessed using the Andreasen scales for the presence of positive and negative symptoms (N.C. Andreasen, 1981, 1983). The Andreasen scales were used to divide schizophrenic patients into 2 subgroups (positive and negative symptoms). Positive-symptom schizophrenic patients showed no differences in their target duration thresholds or in their backward masking functions. Negative-symptom schizophrenic patients showed significantly longer target duration thresholds and experienced significantly more backward masking. There was no difference between schizophrenic patients and controls in forward masking.

Item Details

Item Type:Refereed Article
Research Division:Psychology
Research Group:Applied and developmental psychology
Research Field:Educational psychology
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in human society
UTAS Author:Slaghuis, WL (Dr Walter Slaghuis)
UTAS Author:Bakker, VJ (Ms Vanessa Bakker)
ID Code:5918
Year Published:1995
Web of Science® Times Cited:63
Deposited By:Psychology
Deposited On:1995-08-01
Last Modified:2011-08-25

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