Which test is a sustained attention measure, also described as working memory, mental arithmetic, or letter-number sequencing?

• A. Digit span forward
• B. CPT
• C. Simple attention measure
• D. Coding, symbol search, cancelation tasks

Answer: (B)

Sustained attention involves keeping focus over an extended period and responding consistently to target stimuli while withholding responses to non-targets. The Continuous Performance Test is designed specifically for this, requiring continuous monitoring and quick, accurate responses across a long task. It captures vigilance and response control over time, which are the hallmarks of sustained attention and are particularly relevant in ADHD assessment.

In contrast, tasks like digit span forward, mental arithmetic, and letter-number sequencing are classic working memory challenges; they require holding and manipulating information rather than maintaining attention over time. The grouping of coding, symbol search, and cancellation tasks targets processing speed and perceptual-m MPI skills rather than sustained attention. So the Continuous Performance Test best fits the description of a sustained attention measure.