Is there atypical handedness in schizophrenia?
Ninety-three schizophrenic patients and 105 normal controls were tested in a single session on an 8-item repeat-administration handedness test. The schizophrenic group, in contrast to the normal controls, showed a shift in the distribution away from right-handedness, which was due to an increase in the proportion of mixed-handers. Additional analyses revealed that the increase in mixed-handedness was largely due to an increase of within-item variability in the schizophrenic group, which we refer to as ambiguous handedness. Nearly 20% of the schizophrenic patients were inconsistent on 3 or more items compared with 3.8% of the normal controls. This increased incidence of atypical handedness is discussed within the context of disorders of attention and neurodevelopment.
Green
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Satz
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Smith
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Nelson
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D000328:Adult; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008297:Male; D019965:Neurocognitive Disorders / Q000523:psychology*; D012307:Risk Factors; D012565:Schizophrenic Psychology