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- Title
Components of visual search in childhood-onset schizophrenia and attention-deficit/hyperactivity disorder.
- Authors
Karatekin, Canan; Asarnow, Robert F.; Karatekin, C; Asarnow, R F
- Abstract
This study tested the hypotheses that visual search impairments in schizophrenia are due to a delay in initiation of search or a slow rate of serial search. We determined the specificity of these impairments by comparing children with schizophrenia to children with attention-deficit hyperactivity disorder (ADHD) and age-matched normal children. The hypotheses were tested within the framework of feature integration theory by administering children tasks tapping parallel and serial search. Search rate was estimated from the slope of the search functions, and duration of the initial stages of search from time to make the first saccade on each trial. As expected, manual response times were elevated in both clinical groups. Contrary to expectation, ADHD, but not schizophrenic, children were delayed in initiation of serial search. Finally, both groups showed a clear dissociation between intact parallel search rates and slowed serial search rates.
- Subjects
SEARCHING behavior in children; VISUAL perception in children; SCHIZOPHRENIA in children; ATTENTION-deficit hyperactivity disorder; ANALYSIS of variance; ATTENTION; CLINICAL trials; COGNITION disorders; COMPARATIVE studies; RESEARCH methodology; MEDICAL cooperation; REACTION time; RESEARCH; RESEARCH funding; SACCADIC eye movements; SCHIZOPHRENIA; EVALUATION research
- Publication
Journal of Abnormal Child Psychology, 1998, Vol 26, Issue 5, p367
- ISSN
0091-0627
- Publication type
journal article
- DOI
10.1023/A:1021903923120