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Journal of Psychoeducational Assessment
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The Cognitive Abilities Scale—Second Edition Preschool Form

Studies of Concurrent Criterion-Related, Construct, and Predictive Criterion-Related Validity

Jennifer R. Swanson

Orelena Hawks Puckett Institute

Sharon Bradley-Johnson

Central Michigan University, johns1sb{at}cmich.edu

C. Merle Johnson

Central Michigan University

Anna Rubenaker O'Dell

Clare-Gladwin Intermediate School District

Three studies examine the validity of the Preschool Form of the Cognitive Abilities Scale—Second Edition (CAS-2). Significant high concurrent criterion-related validity correlations, corrected for restricted range, are found between the CAS-2 and the Detroit Test of Learning Ability—Primary: Third Edition for 26 three-year-olds (rc = .86) and the Bayley Scales of Infant Development—Second Edition for 20 two-year-olds (rc = .63). Significant correlations also are evident for the CAS-2 and the Test of Early Language Development—Third Edition for 26 three-year-olds (rc = .77) and the Adaptive Behavior Assessment System—Second Edition for 20 two-year-olds ( rc = .65). Predictive power is critical when making interpretations regarding future performance. A high, significant correlation (r c = .72) is observed for the CAS-2 for 37 children at ages 2 and 3 and the Wechsler Intelligence Scale for Children—Third Edition administered 6 years later. Results expand validity evidence for the CAS-2, increasing confidence in interpretations regarding young children's performance.

Key Words: CAS-2 • validity

This version was published on February 1, 2009

Journal of Psychoeducational Assessment, Vol. 27, No. 1, 46-56 (2009)
DOI: 10.1177/0734282908322454
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