Dichotic listening asymmetries and psychotic symptoms in schizophrenia: a preliminary report.
Schizophrenic subjects were compared with both psychiatric control and normal control groups on two verbal measures of functional hemispheric asymmetry on a dichotic listening task. One measure of language perception showed little variation in ear differences across groups. However, the task that contained both attentional and language-processing components showed variations in asymmetry according to symptomatology. Subjects with high scores on scales of hallucinations and delusions showed a pattern of ear differences that was not found in those with low scores on these symptom dimensions. The results may reflect cognitive factors in a dysfunctional information-processing system and, in particular, attentional disturbance rather than anomalies in the lateralization of language.
Wale
J
J
Department of Psychiatry, Royal Adelaide Hospital, South Australia.
Carr
V
V
D000293:Adolescent; D000328:Adult; D001288:Attention; D003866:Depressive Disorder / Q000523:psychology; D004007:Dichotic Listening Tests; D004292:Dominance, Cerebral; D005260:Female; D006320:Hearing Tests; D006801:Humans; D008297:Male; D008875:Middle Aged; D010700:Phonetics; D011930:Reaction Time; D012565:Schizophrenic Psychology; D013067:Speech Perception