Author:
COLLIE ALEXANDER,MARUFF PAUL,DARBY DAVID G.,McSTEPHEN MICHAEL
Abstract
Performance on many cognitive and neuropsychological tests
may be improved by prior exposure to testing stimuli and
procedures. These beneficial practice effects can have a
significant impact on test performance when conventional
neuropsychological tests are administered at test–retest
intervals of weeks, months or years. Many recent investigations
have sought to determine changes in cognitive function over
periods of minutes or hours (e.g., before and after anesthesia)
using computerized tests. However, the effects of practice at
such brief test–retest intervals has not been reported.
The current study sought to determine the magnitude of practice
effects in a group of 113 individuals assessed with an automated
cognitive test battery on 4 occasions in 1 day. Practice effects
were evident both between and within assessments, and also within
individual tests. However, these effects occurred mostly between
the 1st and 2nd administration of the test battery, with smaller,
nonsignificant improvements observed between the 2nd, 3rd, and
4th administrations. On the basis of these results, methodological
and statistical strategies that may aid in the differentiation
of practice effects from drug-induced cognitive changes are
proposed. (JINS, 2003, 9, 419–428.)
Publisher
Cambridge University Press (CUP)
Subject
Psychiatry and Mental health,Neurology (clinical),Clinical Psychology,General Neuroscience
Cited by
354 articles.
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