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Characterization of Stability of Performance in Patients With Traumatic Brain Injury: Variability and Consistency on Reaction Time Tests

Characterization of Stability of Performance in Patients With Traumatic Brain Injury: Variability... The stability of performance of reaction times on 3 visual discrimination tasks was assessed in patients with varying severity of traumatic brain injury (TBI) and in matched control Ss. Results were analyzed for group and individual variability and consistency of performance over time. There was significantly greater intersubject (group) variability in the TBI group. Individual patients (intrasubject) tended to be more variable in performance and less consistent over time than control Ss, but this occurred only with specific measures, which suggests that increased lack of stability in performance is not a general impairment after brain damage but requires specific analyses for identification of performance differences. This intrasubject variability was independent of test–retest and split-half test reliability. No obvious factors such as severity of brain injury were related to the variability and inconsistency of performance. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png NeuroPsychology American Psychological Association

Characterization of Stability of Performance in Patients With Traumatic Brain Injury: Variability and Consistency on Reaction Time Tests

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Publisher
American Psychological Association
Copyright
Copyright © 1994 American Psychological Association
ISSN
0894-4105
eISSN
1931-1559
DOI
10.1037/0894-4105.8.3.316
Publisher site
See Article on Publisher Site

Abstract

The stability of performance of reaction times on 3 visual discrimination tasks was assessed in patients with varying severity of traumatic brain injury (TBI) and in matched control Ss. Results were analyzed for group and individual variability and consistency of performance over time. There was significantly greater intersubject (group) variability in the TBI group. Individual patients (intrasubject) tended to be more variable in performance and less consistent over time than control Ss, but this occurred only with specific measures, which suggests that increased lack of stability in performance is not a general impairment after brain damage but requires specific analyses for identification of performance differences. This intrasubject variability was independent of test–retest and split-half test reliability. No obvious factors such as severity of brain injury were related to the variability and inconsistency of performance.

Journal

NeuroPsychologyAmerican Psychological Association

Published: Jul 1, 1994

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