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ERIC Number: EJ1055844
Record Type: Journal
Publication Date: 2014-Mar
Pages: 12
Abstractor: As Provided
ISSN: ISSN-1045-3830
Bifactor Structure of the Wechsler Preschool and Primary Scale of Intelligence-Fourth Edition
Watkins, Marley W.; Beaujean, A. Alexander
School Psychology Quarterly, v29 n1 p52-63 Mar 2014
The Wechsler Preschool and Primary Scale of Intelligence-Fourth Edition (WPPSI-IV; Wechsler, 2012) represents a substantial departure from its predecessor, including omission of 4 subtests, addition of 5 new subtests, and modification of the contents of the 5 retained subtests. Wechsler (2012) explicitly assumed a higher-order structure with general intelligence ("g") as the second-order factor that explained all the covariation of several first-order factors but failed to consider a bifactor model. The WPPSI-IV normative sample contains 1,700 children aged 2 years and 6 months through 7 years and 7 months, bifurcated into 2 age groups: 2:6-3:11 year olds (n = 600) and 4:0-7:7 year olds (n = 1,100). This study applied confirmatory factor analysis to the WPPSI-IV normative sample data to test the fit of a bifactor model and to determine the reliability of the resulting factors. The bifactor model fit the WPPSI-IV normative sample data as well as or better than the higher-order models favored by Wechsler (2012). In the bifactor model, the general factor accounted for more variance in every subtest than did its corresponding domain-specific factor and the general factor accounted for more total and common variance than all domain-specific factors combined. Further, the domain-specific factors exhibited poor reliability independent of "g" (i.e., ?[subscript h] coefficients of 0.05 to 0.33). These results suggest that only the general intelligence dimension was sufficiently robust and precise for clinical use. (Contains 2 tables and 3 figures.)
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Assessments and Surveys: Wechsler Preschool and Primary Scale of Intelligence
Grant or Contract Numbers: N/A