Investigates the general factor and uniqueness characteristics of the individual tests of the Woodcock-Johnson Test of Cognitive Ability-Revised (WJTCA-R). Only 2 of the 19 WJTCA-R tests examined had low general factor loadings, while 2 had low uniqueness. All other tests had medium or high uniqueness. Discusses implications for clinical…

Notes that significantly different results frequently exist between tests that purport to measure the same skill when the same child is tested on both instruments. Considers discrepancies related to examinee, examiner, examinee-examiner interactions, environment, and psychometric characteristics of the tests employed. Cites 10 major psychometric…