Schizophrenia and rightward bias in line bisection

This study investigated line bisection in 10 males with schizophrenia and 15 controls. There was an overall leftward bias, consistent with slight right "pseudoneglect", but the schizophrenia group showed more variation with experimental conditions, suggesting impaired interhemispheric tran...

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Bibliographic Details
Published in:Laterality (Hove) 2006-01, Vol.11 (1), p.36-42
Main Author: Barnett, Kylie
Format: Article
Language:English
Subjects:
Adult
Bias
Brain
Brain hemispheres
Dominance, Cerebral
Functional Laterality
Hand Movements
Humans
Laterality
Male
Neuropsychological Tests
Orientation
Perceptual Disorders - diagnosis
Perceptual Disorders - psychology
Psychiatric Status Rating Scales
Psychomotor Performance
Reference Values
Schizophrenia
Schizophrenia - diagnosis
Schizophrenic Psychology
Spatial Attention
Statistics as Topic
Unilateral neglect
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Summary:This study investigated line bisection in 10 males with schizophrenia and 15 controls. There was an overall leftward bias, consistent with slight right "pseudoneglect", but the schizophrenia group showed more variation with experimental conditions, suggesting impaired interhemispheric transfer. Specifically, the rightward bias was especially marked when the lines were positioned on the right side of the page, when the right hand was used, and when a right to left scan was adopted. The rightward bias was associated with the predominance of negative symptoms. Findings are discussed with reference to the role of the corpus callosum in the transfer of spatial attention.
ISSN:1357-650X
1464-0678
DOI:10.1080/13576500500233628