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| Research article summary (published 29 Apr 2009): |
Oscillatory correlates of retrieval-induced forgetting in recognition memory.
Full Abstract
Retrieval practice on a subset of previously studied material enhances later memory for practiced material but can inhibit memory for related unpracticed material. The present study examines the effects of prior retrieval practice on evoked (ERPs) and induced (oscillatory power) measures of electrophysiological activity underlying recognition of practiced and unpracticed words. Compared to control material, recognition of unpracticed words was characterized by reduced amplitudes of the P2 ERP component and by reduced early (200-400 msec) oscillatory theta power. The reduction in P2 amplitude was associated with decreased evoked theta power but not with decreased theta phase locking (phase-locking index). Recognition of unpracticed material was further accompanied by a reduction in occipital gamma power (>250 msec). In contrast, the beneficial effects of retrieval practice on practiced words were reflected by larger parietal ERP positivity (>500 msec) and by a stronger decrease in oscillatory alpha power in a relatively late time window (>700 msec). The results suggest that the beneficial and detrimental effects of retrieval practice are mediated by different processes. In particular, they suggest that reduced theta (4-7 Hz) and gamma (60-90 Hz) power reflect the specific effects of inhibitory processes on the unpracticed material's memory representation.
Author information
Author/s: Spitzer, Bernhard (B); Hanslmayr, Simon (S); Opitz, Bertram (B); Mecklinger, Axel (A); Bäuml, Karl-Heinz (KH);
Affiliation: Regensburg University, Germany.
Journal and publication information
Publication Type: Journal Article; Research Support, Non-U.S. Gov't
Journal: Journal of cognitive neuroscience (J Cogn Neurosci), published in United States. (Language: eng)
Reference: 2009-May; vol 21 (issue 5) : pp 976-90
Dates: Created 2009/04/09; Completed 2009/06/04;
PMID: 18702597, status: MEDLINE (last retrieval date: 6/4/2009, IMS Date: )
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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