The factorial structure of schizotypy: Part II. Cognitive asymmetry, arousal, handedness, and sex

Schizophrenia Bulletin
J H Gruzelier, A Doig

Abstract

We replicate relations between factors of schizotypy and cognitive asymmetry patterns assessed with recognition memory for words versus faces, and with arousal levels assessed with self-report scales. The withdrawn factor or subscales of loneliness and constricted affect were associated as before with a right hemisphere, face advantage asymmetry, as was physical anhedonia in males. Subjects with the opposite asymmetry and those high on the active factor--eccentricity and odd speech--had high self-report activation scores. These relations better characterized males who also had higher scores on the asymmetry-related factors. Females had higher scores on the third unreality factor--unusual perceptions and odd beliefs--which showed inconsistent relations with cognitive asymmetry. Non-right-handedness was associated with both hemisphere asymmetry patterns suggesting that the structural mechanism responsible for non-right-handedness is associated with bidirectional hemispheric functional imbalance. The results support the importance of patterns of functional asymmetry in underpinning different aspects of schizotypy.

Citations

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