Memory span refers to the number of items (usually words or digits) that a person can hold in working memory. Tests of memory span are often used to measure working memory capacity. A typical test of memory span involves having an examiner read a list of random digits (digit span) or words (word span) aloud at the rate of one per second. At the end of a sequence, subjects are asked to recall the items in order. The average span for normal adults is 7 [see Miller's (1956) magical number seven plus or minus two].
Miller, G.A. (1956). The magical number seven plus or minus two. Some limits on our capacity for processing information. Psychological Review, 63, 81-97.
Submitted by Bonnie M. French Dictionary Home Page