Pre-existing semantic knowledge and DM effect

The event-related potentials (ERPs) difference according to later memory performance (DM effect) has been regarded as the reflection of the encoding processing in memory. Our great interest was whether or not the emergence of the DM effect depended on accessing pre-existing semantic knowledge. Fifte...

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Bibliographic Details
Published in:International Congress series 2002-04, Vol.1232, p.193-196
Main Authors: Satoh, Kenji, Ohta, Katsuya, Matsutoh, Yoshiki, Matsushima, Eisuke, Yamanaka, Yoshio
Format: Article
Language:English
Subjects:
Event-related potential (ERP)
Late positive component (LPC)
Recognition
Semantic memory
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Summary:The event-related potentials (ERPs) difference according to later memory performance (DM effect) has been regarded as the reflection of the encoding processing in memory. Our great interest was whether or not the emergence of the DM effect depended on accessing pre-existing semantic knowledge. Fifteen healthy subjects were shown 112 words and 112 nonwords and were instructed to memorize these stimuli for the subsequent recognition task. The electroencephalogram (EEG) in the study phase was averaged separately for each stimulus type (word/nonword) and memory performance during the recognition phase (subsequently recognized/not recognized). For the words, the late positive component (LPC) was greater for the items subsequently recognized than for those not recognized at the anterior site (DM effect), whereas DM effect was not observed for nonwords. These findings were compatible with the view that successful utilization of pre-existing semantic knowledge may be necessary for DM effect to emerge.
ISSN:0531-5131
1873-6157
DOI:10.1016/S0531-5131(01)00806-8