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Related Experiment Videos

Wais-III matrix reasoning: instruction effects on task perception and performance.

Tracy A Knight1

  • 1Department of Psychology, Western Illinois University, Macomb, IL 61455, USA. TA-Knight@wiu.edu

Psychological Reports
|October 18, 2003
PubMed
Summary

Many participants incorrectly assume the Matrix Reasoning subtest is timed, negatively impacting scores. Clarifying the untimed nature of this cognitive test improves performance.

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Area of Science:

  • Psychological assessment
  • Cognitive testing
  • Psychometrics

Background:

  • The Wechsler Adult Intelligence Scale-III (WAIS-III) Matrix Reasoning subtest is a key measure of non-verbal reasoning.
  • Standard instructions for the Matrix Reasoning subtest do not explicitly state that it is untimed.
  • Examinee assumptions about test timing can influence performance on cognitive assessments.

Purpose of the Study:

  • To determine the percentage of participants who assume the Matrix Reasoning subtest is timed.
  • To investigate the impact of this assumption on Matrix Reasoning scores.
  • To examine the effect of clarifying the untimed nature of the subtest on performance.

Main Methods:

  • Participants (N=60) received standard WAIS-III Matrix Reasoning instructions.

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  • A subset of participants retrospectively reported their assumptions about the subtest's timing.
  • A separate group received explicit instructions that the subtest was untimed.

    • Main Results:

    • 55% of participants receiving standard instructions retrospectively assumed the Matrix Reasoning subtest was timed.
    • Participants who did not assume the subtest was timed scored significantly higher than those who did.
    • Participants receiving explicit untimed instructions scored significantly higher than those who assumed it was timed.

    Conclusions:

    • Examinee assumptions about test timing can significantly affect cognitive test performance.
    • Standard instructions for the Matrix Reasoning subtest may inadvertently lead to performance deficits.
    • Clarifying the untimed nature of cognitive assessments is crucial for accurate measurement of abilities.