title: Psychometrically matched visual-processing tasks in schizophrenia spectrum disorders.
abstract: Patients with schizophrenia show deficits in visual perception and working memory, but the relationship between these deficits has not been characterized with psychometrically matched tasks. The authors administered 2 visual discrimination and 6 recognition tasks to 43 schizophrenia spectrum patients and 22 nonpsychiatric subjects. When performing difficulty-matched tasks, spectrum subjects showed more severe impairments for motion compared with form processing. When tasks were matched on true score variance, spectrum subjects exhibited worse performance on both form and motion discrimination, and a differential deficit in motion recognition with a short display duration and long interstimulus interval. These results provide evidence of differential deficits in visual processing in schizophrenia that appear to be dependent on the temporal characteristics of the tasks.
authors.affiliation: Department of Psychology, Indiana University, Bloomington 47405, USA. cobrenne@indiana.edu
authors.forename: Colleen A
authors.initials: CA
authors.lastname: Brenner
authors.forename: Marcia A
authors.initials: MA
authors.lastname: Wilt
authors.forename: Paul H
authors.initials: PH
authors.lastname: Lysaker
authors.forename: Andrew
authors.initials: A
authors.lastname: Koyfman
authors.forename: Brian F
authors.initials: BF
authors.lastname: O'Donnell
mesh_terms: D000328:Adult; D004192:Discrimination, Psychological; D005556:Form Perception / Q000502:physiology; D006801:Humans; D008297:Male; D009039:Motion Perception / Q000502:physiology; D010468:Perceptual Disorders / Q000175:diagnosis / Q000209:etiology* / Q000503:physiopathology*; D011594:Psychometrics / Q000379:methods; D011618:Psychotic Disorders / Q000150:complications* / Q000503:physiopathology*; D011897:Random Allocation; D021641:Recognition, Psychology / Q000502:physiology; D012559:Schizophrenia / Q000150:complications* / Q000503:physiopathology*; D012720:Severity of Illness Index; D013997:Time Factors; D014796:Visual Perception / Q000502:physiology*