Certified Rehabilitation Counselor Practice

Which three subtests are included in the Working Memory Index (WMI)?

1. Block Design, Digit Span, and Visual Puzzles

2. Arithmetic, Letter Number Sequencing, and Digit Span

3. Information, Vocabulary, and Coding

4. Picture Completion, Symbol Search, and Letter Number Sequencing

The correct answer is: Arithmetic, Letter Number Sequencing, and Digit Span

The Working Memory Index (WMI) is a critical component of cognitive assessments such as the Wechsler scales, which evaluate various aspects of cognitive functioning. The WMI specifically assesses an individual’s capacity to hold and manipulate information in their mind temporarily, which is essential for tasks that require reasoning, learning, and understanding. The correct answer comprises the subtests that directly measure this working memory function. Arithmetic assesses numerical reasoning and the ability to perform mental calculations under time constraints. Letter-Number Sequencing evaluates the ability to manipulate sequences of letters and numbers, which requires one to hold information in memory while also organizing it. Digit Span measures the ability to repeat back numbers in both forward and reverse order, reflecting not only the retention of information but also the manipulation of that information. These subtests collectively provide a comprehensive understanding of an individual's working memory capabilities, making option B the correct choice. Other combinations presented in the options do not adequately reflect the specific constructs measured by the WMI.