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Generalizability of WAIS-R factor structure within and between populations
L Atkinson1, J J Cyr, N C Doxey
1Early Intervention Service, Surrey Place Centre, Toronto, Canada.
Journal of Clinical Psychology
|January 1, 1989
Summary
The Wechsler Adult Intelligence Scale-Revised (WAIS-R) demonstrates a reliable factor structure across diverse populations. This robustness suggests consistent measurement of adult intelligence, even in head-injured individuals.
Area of Science:
- Psychometrics
- Neuropsychological Assessment
- Cognitive Psychology
Background:
- The Wechsler Adult Intelligence Scale-Revised (WAIS-R) is a widely used measure of adult intelligence.
- Understanding the stability of its factor structure is crucial for accurate interpretation of scores.
Purpose of the Study:
- To investigate the reliability and robustness of the WAIS-R's factor structure.
- To compare factor structures across different populations, including head-injured males.
Main Methods:
- Factor analysis was performed on WAIS-R subtest scores from 146 head-injured males.
- Congruence coefficients were calculated to assess the similarity between extracted factor structures and those from existing literature.
Main Results:
- Two- and three-factor solutions were identified, aligning with previous research findings.
- High congruence coefficients indicated strong associations between the current study's factor structure and those from other samples.
- No significant discrepancies were found when comparing factor structures from different populations, suggesting minimal systematic bias.
Conclusions:
- The factor structure of the WAIS-R is robust and reliable across various populations.
- Observed minor variations in factor structure are likely due to random data fluctuations rather than systematic population differences.
- The WAIS-R demonstrates consistent psychometric properties for assessing adult intelligence.