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Journal of Psychoeducational Assessment
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What's this?

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

Stefan C. Dombrowski

Rider University, sdombrowski{at}rider.edu

Marley W. Watkins

Arizona State University

Michael J. Brogan

Rider University

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.

Key Words: RIAS • exploratory factor analysis • Schmid—Leiman • intelligence testing • factor extraction decision-making

This version was published on December 1, 2009

Journal of Psychoeducational Assessment, Vol. 27, No. 6, 494-507 (2009)
DOI: 10.1177/0734282909333179
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