The contribution of impaired working memory monitoring to performance of the self-ordered pointing task in normal aging and Parkinson's disease

Author(s): Ergis, A. M., Winocur, G., SaintCyr, J.

Journal/Book: Neuropsychology. 1998; 12: 750 First St NE, Washington, DC 20002-4242. Amer Psychological Assoc. 546-554.

Abstract: The factors contributing to the working memory deficit observed in older adults and individuals with Parkinson's disease on the Self-Ordered Pointing Task were examined in 2 experiments. A detailed analysis of the error data revealed that errors tended to be clustered toward the end of a trial and that this effect was somewhat independent of set size. This pattern was proposed to result from a monitoring deficit where individuals failed to maintain an integrated representation of how far they had proceeded in the trial, an interpretation consistent with animal work by M. Petrides (1995).

Note: Article West R, Baycrest Ctr Geriatr Care, Rotman Res Inst, 3560, N York, ON M6A 2E1, CANADA

Keyword(s): CEREBRAL-CORTEX; ADULT AGE; TERM-MEMORY; INHIBITION; RETRIEVAL; SPAN

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