Ž . Psychiatry Research 93 2000 4154 Smooth pursuit eye tracking and visual fixation in psychosis-prone individuals Diane C. Gooding a,b, , Meghan D. Miller a , Thomas R. Kwapil c a Department of Psychology, Uni ersity of Wisconsin-Madison, Madison, WI 53706, USA b Department of Psychiatry, Uni ersity of Wisconsin-Madison, Madison, WI 53706, USA c Department of Psychology, Uni ersity of North Carolina-Greensboro, Greensboro, NC, USA Received 20 May 1999; received in revised form 10 November 1999; accepted 5 December 1999 Abstract Ž . Ž . Subjects identified by Perceptual Aberration-Magical Ideation Per-Mag scores n 97 , Social Anhedonia Ž . Ž . Ž . Ž . Ž . 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 Ž . 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.  2000 Elsevier Science Ireland Ltd. All rights reserved. Keywords: Smooth pursuit eye tracking; Visual fixation; Schizotypy; Social anhedonia; Perceptual aberration; Physical anhedonia; Psychotic-like experiences Corresponding author. Department of Psychology, W.J. Brogden Psychology Bldg., University of Wisconsin-Madison, 1202 West Johnson Street, Madison, WI 53706, USA. Tel.: 1-608-262-3918-fax: 1-608-262-4029. Ž . E-mail address: dgooding@facstaff.wisc.edu D.C. Gooding 0165-1781 00 $ - see front matter  2000 Elsevier Science Ireland Ltd. All rights reserved. Ž . PII: S 0 1 6 5 - 1 7 8 1 00 00113-X