title: Comparison of schizophrenics and normals on a visual search task.
abstract: The response times of 16 paranoids, 16 nonparanoids and 16 normals were compared on a search task which required subjects to identify target letters embedded in displays of varying numbers of non-targets. The rate on increase in response times with increased numbers of letters displayed was not markedly different for the various groups, although a derived measure of decision and response-selection time indicated that normals selected responses more rapidly. When compared with normals, schizophrenics seemed to experience more difficulty in response selection and decision than in processing visual stimulus information.
mesh_terms: D000293:Adolescent; D000328:Adult; D003657:Decision Making; D005260:Female; D005556:Form Perception; D006760:Hospitalization; D006801:Humans; D007257:Information Theory; D008297:Male; D011930:Reaction Time; D012559:Schizophrenia / Q000150:complications; D012563:Schizophrenia, Paranoid / Q000150:complications; D012565:Schizophrenic Psychology; D014796:Visual Perception