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Related Experiment Videos

Confirmatory factor analysis of the Wechsler Memory Scale-Revised standardization sample.

D B Burton1, W Mittenberg, C A Burton

  • 1Nova University School of Psychology, USA.

Archives of Clinical Neuropsychology : the Official Journal of the National Academy of Neuropsychologists
|November 1, 1993
PubMed
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The Wechsler Memory Scale-Revised (WMS-R) best measures memory through a three-factor model: Attention/Concentration, Immediate Memory, and Delayed Memory. This model explains most score variance and challenges the verbal/nonverbal distinction.

Area of Science:

  • Psychological Assessment
  • Cognitive Psychology
  • Psychometrics

Background:

  • The Wechsler Memory Scale-Revised (WMS-R) is a widely used tool for assessing memory function.
  • Previous research has proposed various factor structures for the WMS-R, leading to competing models of memory.
  • Understanding the underlying factor structure is crucial for accurate interpretation of WMS-R scores.

Purpose of the Study:

  • To determine the optimal factor solution for explaining memory function as measured by the WMS-R.
  • To compare seven hypothesized latent variable models derived from previous factor analytic studies.
  • To evaluate the validity of the Attention/Concentration, Immediate and Delayed Memory model.

Main Methods:

  • Confirmatory factor analysis using LISREL on the variance-covariance matrix of the WMS-R (N=316).

Related Experiment Videos

  • Standardization of the WMS-R scores prior to analysis.
  • Measurement error matrix adjusted to remove method variance between immediate and delayed trials of subtests.

    • Main Results:

    • A three-factor model (Attention/Concentration, Immediate Memory, Delayed Memory) provided the best fit to the data.
    • This three-factor model explained 91% of the score variance.
    • The proposed three-factor model demonstrated a significantly better fit compared to Attention/Concentration--General Memory and Attention/Concentration--Visual/Verbal Memory models.

    Conclusions:

    • The findings support the WMS-R's ability to measure distinct memory functions.
    • The results suggest that the distinction between verbal and nonverbal memory indices may not be a viable construct.
    • A three-factor structure offers a robust framework for understanding WMS-R memory assessment.