Acquisition of a Mnemonic System for Digit Span.
CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF PSYCHOLOGY
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After more than 6 months of practice on the memory span task, a single subject was able to increase his digit span from 7 digits to about 40 digits. This memory feat is accomplished with the development of a mnemonic system and a control structure for retaining the order of items. There is no evidence of an increase in short-term memory capacity. Author