What best describes the difference between the WPPSI and the WISC, and what domains does WPPSI measure?

• A. The WPPSI is designed for older school-age children; the WISC is for preschoolers; WPPSI measures Verbal IQ only.
• B. The WPPSI is designed for younger children; the WISC is for school-age children; WPPSI measures Verbal and Performance (nonverbal) cognitive abilities along with Working Memory and Processing Speed subtests depending on edition.
• C. The WPPSI and WISC have identical age ranges and domains but are used in different settings.
• D. The WPPSI uses only nonverbal tasks; the WISC uses verbal tasks exclusively.

Answer: (B)

The main idea here is recognizing that development dictates what the tests measure and for whom they’re designed. The WPPSI is designed for younger children—preschool and early school age—while the WISC is for school-age children and up. In terms of what they measure, the WPPSI assesses both verbal and nonverbal (performance) cognitive abilities, and depending on the edition, it also includes Working Memory and Processing Speed subtests to give a broader profile. This combination matches the needs of younger children, whose cognitive abilities span both verbal and nonverbal domains and require age-appropriate measures.

That’s why this option is the best. It correctly states the age focus and that WPPSI covers verbal and nonverbal areas, with the possible inclusion of Working Memory and Processing Speed, rather than restricting WPPSI to a single domain or claiming identical age ranges and domains with the WISC, or that WPPSI uses only nonverbal tasks.