digit span
A neuropsychological test measuring working memory capacity by assessing recall of number sequences.
Full Definition
Digit span is a widely used neuropsychological assessment tool that evaluates working memory and attention span by measuring an individual's ability to repeat sequences of numbers both forward and backward. The test typically involves progressively longer sequences until the patient fails to correctly repeat two sequences of the same length. Forward digit span primarily assesses attention and immediate memory, while backward digit span requires additional working memory and mental manipulation skills. This test is a component of most major cognitive assessment batteries.
Usage
Usage note: Score both forward and backward components separately; normal forward span is typically 6±1 digits.
In Context
- "The patient's digit span forward was 6, but backward span was reduced to 3, suggesting working memory impairment." — Neuropsychological test report
- "Digit span performance declined significantly from baseline, indicating progressive cognitive deterioration." — Longitudinal assessment summary