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Journal of Psychoeducational Assessment
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0734282909333179v1
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Article

An Exploratory Investigation of the Factor Structure of the Reynolds Intellectual Assessment Scales (RIAS)

Stefan C. Dombrowski1*, Marley W. Watkins2, and Michael J. Brogan1

1 Rider University
2 Arizona State University

* To whom correspondence should be addressed. E-mail: sdombrowski{at}rider.edu.


  Abstract
This study investigated the factor structure of the Reynolds Intellectual Assessment Scales (RIAS) using rigorous exploratory factor analytic and factor extraction procedures. The results of this study indicate that the RIAS is a single factor test. Despite these results, higher order factor analysis using the Schmid–Leiman procedure indicates that all subtests are aligned with their theoretically consistent factors. All analyses in this study, including the minimum average partial test, parallel analysis, the Schmid–Leiman procedure, as well as principal factors with orthogonal and oblique rotation, support interpretation at the composite intelligence index level and suggest caution when moving to interpretation at the verbal and nonverbal index levels. The memory subtests should continue to be separated from the main IQ battery because of poor g-loadings and contribution to cross loadings of the intelligence subtests. Interpretation at the subtest level should be eschewed.

First published on April 7, 2009, doi:10.1177/0734282909333179

Journal of Psychoeducational Assessment 2009;27:494.

A more recent version of this article appeared on December 1, 2009

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