Which instrument is designed to assess cognitive abilities with a CHC-based structure in a widely used battery and has subtests across broad and narrow abilities?

• A. WISC
• B. WAIS
• C. WIAT
• D. WJ-COG

Answer: (D)

CHC theory groups cognitive skills into broad abilities with many narrower subskills, and the most informative cognitive batteries map subtests to that structure. The Woodcock-Johnson Cognitive Battery is built explicitly on this CHC framework and is widely used in educational and clinical settings. Its subtests are designed to assess broad abilities—such as Fluid Reasoning, Crystallized Knowledge, Short-Term Memory, Processing Speed, and Auditory Processing—and the narrower skills within those domains, providing a detailed cognitive profile across a wide range of abilities. By contrast, the other options represent different focuses or theoretical foundations: the WISC and WAIS are Wechsler scales based on their own framework and, while they include multiple subtests, are not organized around CHC with comprehensive broad-to-narrow mappings across a single battery. The WIAT is an achievement test, not a cognitive ability measure.