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| Research article summary (published 27 Feb 1993): |
Skill and hemispheric specialization in detecting featural differences in visual images.
Full Abstract
Visual asymmetry patterns related to skill were examined during a target-probe matching task in 24 skilled medical technologists and 24 matched controls. On each of 240 test trials, digitized replicas of specimens commonly encountered in medical laboratory diagnostics were shown centrally for 500 msec. Each target was immediately followed by a lateralized probe item for 120 msec that was either an exact copy (positive probe) or a distorted version (negative probe) of the target. Difficulty level of target-probe matching was manipulated on negative probe trials; half of the negative items consisted of difficult discriminations which were selected to assess the effects of domain-specific experience on detecting small differences in salient morphological features. Medical technologists exhibited a right visual field advantage, but were not different from the control subjects in speed or accuracy to positive probes or to easy negative probes. The observed left-hemisphere advantage in skilled visual processing is attributed to the beneficial effects of experience on the development of domain-specific visual analysis skills.
Author information
Author/s: Clancy, S M (SM); Hoyer, W J (WJ);
Affiliation: Department of Psychology, Southern Illinois University, Carbondale 62901.
Grants: AG06041 (Agency:NIA NIH HHS)
Journal and publication information
Publication Type: Comparative Study; Journal Article; Research Support, U.S. Gov't, P.H.S.
Journal: Brain and cognition (Brain Cogn), published in UNITED STATES. (Language: eng)
Reference: 1993-Mar; vol 21 (issue 2) : pp 192-202
Dates: Created 1993/04/02; Completed 1993/04/02; Revised 2007/11/14;
PMID: 8442935, status: MEDLINE (last retrieval date: 2/18/2009, IMS Date: )
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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