Factor Analysis of the WAIS-R Using the Factor Replication Procedure, FACTOREP
Multivariate Behavioral Research
|January 14, 2016
Summary
The Wechsler Adult Intelligence Scale-Revised (WAIS-R) likely has two distinct factors, not three. A new analysis using FACTOREP suggests previous findings of three factors were influenced by a general factor.
Area of Science:
- Psychometrics
- Cognitive Psychology
Background:
- The factor structure of the Wechsler Adult Intelligence Scale-Revised (WAIS-R) is debated.
- Previous studies using coefficient of congruence suggested three factors.
Purpose of the Study:
- To re-evaluate the factor structure of the WAIS-R.
- To address claims that previous findings were artifacts of a general factor.
Main Methods:
- Utilized identical data from a previous study.
- Employed the FACTOREP factor comparison technique.
- FACTOREP was used to reduce the influence of error variance and the general factor.
Main Results:
- The analysis demonstrated two strong factors within the WAIS-R.
- Little evidence was found to support the existence of a third factor.
Conclusions:
- The WAIS-R factor structure is best represented by two factors.
- The previous conclusion of three factors may have been an artifact.
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