Which indices on the WAIS reflect verbal and perceptual abilities separately?

• A. Verbal Comprehension Index and Perceptual Reasoning Index
• B. Verbal Comprehension Index only
• C. Perceptual Reasoning Index only
• D. Processing Speed Index

Answer: (A)

This question is about how the WAIS separates different kinds of abilities into distinct scores. The Verbal Comprehension Index measures verbal abilities—things like vocabulary, verbal reasoning, and understanding language. The Perceptual Reasoning Index measures nonverbal, perceptual-spatial abilities—how well you analyze and solve problems using visual information, patterns, and spatial relationships. These two indices are designed to capture separate domains, giving you a verbal strength measure and a perceptual (nonverbal) strength measure on their own, rather than lumping them into one score.

The other indices don’t fit the request for separately reflecting verbal and perceptual abilities. Verbal Comprehension alone omits the perceptual side, while Perceptual Reasoning alone omits the verbal side. Processing Speed reflects how quickly you can perform simple tasks, which is a different dimension altogether and not a direct measure of verbal or perceptual reasoning.