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  • Title: Perceptual asymmetry in psychosis-prone college students: evidence for left-hemisphere overactivation.
    Author: Overby LA.
    Journal: J Abnorm Psychol; 1992 Feb; 101(1):96-103. PubMed ID: 1537979.
    Abstract:
    The hypothesis that psychosis-prone students demonstrate a pattern of exaggerated perceptual asymmetry across both left- and right-hemisphere dichotic-listening tasks (consonant-vowel [CV] and tonal contour discrimination) was investigated. Subjects who scored high on the Perceptual Aberration or Magical Ideation scale or both (n = 20) demonstrated a significantly exaggerated right-ear advantage on a CV task in relation to normal control subjects (n = 27) but showed a reduced left-ear advantage on a tone task. The hypothesis of exaggerated functional lateralization across hemispheres in the psychosis-prone subjects was not supported, but the results are consistent with a hypothesis of left hemisphere overactivation in this sample.
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