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Related Experiment Videos

Dynamic testing in schizophrenia: does training change the construct validity of a test?

Karl H Wiedl1, Henning Schöttke, Michael F Green

  • 1Department of Psychology, University of Osnabrück, Germany. Wiedl@uni-osnabrueck.de

Schizophrenia Bulletin
|June 15, 2005
PubMed
Summary

Dynamic testing of the Wisconsin Card Sorting Test (WCST) offers unique insights. The dynamic WCST, using cognitive remediation, better predicts functional outcomes by assessing problem-solving and memory, unlike static versions.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology

Background:

  • Dynamic testing assesses performance modification beyond baseline levels.
  • The Wisconsin Card Sorting Test (WCST) has static and dynamic versions.
  • Previous research suggests differing construct validity between static and dynamic WCST in schizophrenia patients.

Purpose of the Study:

  • To test the hypothesis that dynamic and static WCST versions possess different construct validity.
  • To examine the correlation patterns of dynamic WCST with executive functioning, verbal memory, and intelligence measures.
  • To determine if dynamic WCST administration enhances predictive validity for functional outcomes.

Main Methods:

  • Utilized a dynamic version of the WCST incorporating cognitive remediation in a test-training-test format.

Related Experiment Videos

  • Correlated dynamic WCST posttest scores with performance on the Tower of Hanoi (problem-solving) and Auditory Verbal Learning Test (verbal memory).
  • Assessed the influence of general verbal capacity (Verbal IQ) and selective attention (Stroop Test) on dynamic WCST scores.

    • Main Results:

    • Dynamic WCST scores demonstrated specific construct validity for problem-solving and verbal learning.
    • The influence of general verbal capacity and selective attention on dynamic WCST scores was reduced compared to static administration.
    • Dynamic WCST scores showed a stronger correlation with functional outcomes than static WCST scores.

    Conclusions:

    • The construct validity of the WCST is altered by dynamic administration.
    • Dynamic WCST administration provides a more accurate index of problem-solving and learning.
    • The enhanced predictive validity of the dynamic WCST for functional outcomes is explained by its specific construct validity.