Canivez, Konold, Collins, and Wilson (2009) examined the construct validity of the Wechsler Abbreviated Intelligence Scale (WASI) and the Wide Scale Intelligence Test (WRIT), two brief measures of general intelligence.The authors investigated the convergent validity and latent factor structure of these two scales in a sample of 152 participants, including children, adolescents, and adults.
The convergent validity between the WASI and WRIT scales was demonstrated by high correlations between similar subtests and between total IQ scores. Joint exploratory factor analysis revealed a two-factor structure, consistent with crystallized verbal skills and nonverbal visual fluid skills, which strongly correlate, indicating the presence of a higher order factor (general intelligence). The hierarchical confirmatory factor analysis confirmed the two-factor structure and the importance of the general intelligence factor.
The authors conclude that both scales measure similar constructs, with considerable variance shared between total IQ measures, verbal crystallized measures, and nonverbal visual fluid measures. The results of the study corroborate the construct validity of WASI and WRIT as measures of general intelligence and specific cognitive abilities.
CANIVEZ, G. L.; KONOLD, T. R.; COLLINS, J. M.; WILSON, G. Construct validity of the Wechsler abbreviated scale of intelligence and wide range intelligence test: Convergent and structural validity. Quarterly School of Psychology, 24, paragraph 4, pp. 252-265, 2009.
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