Which of the following is a subset of working memory on IQ tests?

• A. Coding
• B. Symbol Search
• C. Cancellation
• D. Picture Span

Answer: (D)

Working memory on IQ tests is about holding and actively manipulating information in the mind over a short period. Picture Span fits this role because it requires you to view a sequence of pictures, hold that sequence in memory, and then recall or indicate the pictures in the correct order. This taps both keeping information online and updating it as you process the task, which are core components of working memory.

The other tasks are primarily about processing speed. Coding asks you to quickly translate or transcribe symbols under time pressure, measuring how fast you can encode and respond. Symbol Search requires rapid scanning and deciding whether target symbols are present, emphasizing speed of perceptual processing. Cancellation involves quickly marking targets among distractors, again focusing on fast processing and accuracy rather than holding and manipulating information in working memory.

So, Picture Span uniquely engages the storage and manipulation aspects of working memory, making it the best fit among the options.