Smooth pursuit eye tracking and visual fixation in psychosis-prone individuals

Diane C. Gooding, Meghan D. Miller, Thomas R. Kwapil

Research output: Contribution to journalArticlepeer-review

Abstract

Subjects identified by Perceptual Aberration-Magical Ideation (Per-Mag) scores (n = 97), Social Anhedonia (SocAnh) scores (n = 45), and Physical Anhedonia (PhysAnh) scores (n = 31) as well as normal controls (n = 94), underwent psychophysiological and clinical assessment. This is the first published investigation of pursuit system functioning in three groups of questionnaire-identified at-risk individuals. Pursuit during a simple non- monitor tracking task was measured using root-mean-square error (RMSE) scores and pursuit gain scores. Fixation performance was measured in terms of number of saccades away from the central fixation point. The at-risk subjects were more likely to display aberrant smooth pursuit tracking than controls, though there were no significant differences between the at-risk subjects endorsing items relevant to positive-symptom schizotypy and those endorsing items pertaining to negative-symptom schizotypy. The groups did not differ significantly in their visual fixation performance. Participants were also evaluated for the presence of Axis I symptomatology and psychotic-like experiences. Neither the experimental subjects nor the control subjects displayed a significant association between ocular motor performance and psychotic-like experiences. These findings are consistent with prior evidence that pursuit tracking is a trait characteristic, independent of clinical status. (C) 2000 Elsevier Science Ireland Ltd.

Original languageEnglish (US)
Pages (from-to)41-54
Number of pages14
JournalPsychiatry Research
Volume93
Issue number1
DOIs
StatePublished - Feb 14 2000
Externally publishedYes

Keywords

  • Perceptual aberration
  • Physical anhedonia
  • Psychotic-like experiences
  • Schizotypy
  • Smooth pursuit eye tracking
  • Social anhedonia
  • Visual fixation

ASJC Scopus subject areas

  • Psychiatry and Mental health
  • Biological Psychiatry

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