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PubMed · 10978689

Event-related potentials during conscious and automatic memory retrieval.

K A Kane·T W Picton·M Moscovitch·G Winocur
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Abstract

The effects of study-test lags of between 0 and 32 items on conscious (C) and automatic (A) memory processes in a running word-completion task were investigated with event-related potentials (ERPs). The process dissociation procedure (PDP) can distinguish between C and A contributions to memory by comparing performance when subjects respond with either an old item (inclusion) or a new item (exclusion). C can be estimated by subtracting the probability of an intrusion of an old item during the exclusion task (due to A without C) from the probability of correctly producing an old item during the inclusion task (due to C and/or A). The behavioral results showed that C was stronger when the test item followed the studied word in the next trial or after a lag of one stimulus. The strength of A did not vary with lag. The ERP waveforms contained a broad parietal positive wave between 300 and 800 ms. This parietal wave distinguished between correctly recalled old and new words. The early portion of this old-new effect was significantly affected by lag. Subtracting waveforms to obtain a measure of C revealed an effect in the later portion of this wave, lateralized over the left hemisphere. A sustained frontal negativity occurred during all recordings and was larger during conscious retrieval. There was no consistent ERP effect related to automatic memory retrieval.

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AdultAwarenessBehaviorBrain MappingEvoked PotentialsFemaleHumansMaleMental RecallTime FactorsVerbal BehaviorJournal ArticleResearch Support, Non-U.S. Gov't

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K A Kane, T W Picton, M Moscovitch, G Winocur. 2000. Event-related potentials during conscious and automatic memory retrieval.. https://doi.org/10.1016/s0926-6410(00)00018-5

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