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ERIC Number: EJ934211
Record Type: Journal
Publication Date: 2011-Jun
Pages: 11
Abstractor: As Provided
ISSN: ISSN-1045-3830
General Factor Loadings and Specific Effects of the Differential Ability Scales, Second Edition Composites
Maynard, Jennifer L.; Floyd, Randy G.; Acklie, Teresa J.; Houston, Lawrence, III
School Psychology Quarterly, v26 n2 p108-118 Jun 2011
The purpose of this study was to investigate the "g" loadings and specific effects of the core and diagnostic composite scores from the Differential Abilities Scales, Second Edition (DAS-II; Elliott, 2007a). Scores from a subset of the DAS-II standardization sample for ages 3:6 to 17:11 were submitted to principal factor analysis. Four composites, Nonverbal Reasoning Ability, Verbal Ability, Spatial Ability, and Working Memory, appear to be primarily measures of the general factor across most age levels. In contrast, Processing Speed appears to primarily be a measure of a specific ability or specific abilities across age levels. A secondary analysis revealed that averaging subtest "g" loadings produced downwardly biased values for composites, that the Spearman (1927) formula for determining the "g" loading of a composite produced upwardly biased values, and that averaging subtest specific effects produced upwardly biased values for composites. (Contains 4 tables and 1 footnote.)
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Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A