Event-related potential correlates of interference effects on recognition memory |
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Authors: | Kenneth A Norman Katharine Tepe Erika Nyhus Tim Curran |
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Institution: | Department of Psychology, Princeton University, Princeton, New Jersey 08540, USA. knorman@princeton.edu |
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Abstract: | The question of interference (how new learning affects previously acquired knowledge and vice versa) is a central theoretical
issue in episodic memory research, but very few human neuroimaging studies have addressed this question. Here, we used event-related
potentials (ERPs) to test the predictions of the complementary learning systems (CLS) model regarding how list strength manipulations
(strengthening some, but not all, items on a study list) affect recognition memory. Our analysis focused on the FN400 old-new effect, a hypothesized ERP correlate of familiarity-based recognition, and the parietal old-new effect, a hypothesized ERP
correlate of recollection-based recognition. As is predicted by the CLS model, increasing list strength selectively reduced
the ERP correlate of recollection-based discrimination, leaving the ERP correlate of familiarity-based discrimination intact.
In a second experiment, we obtained converging evidence for the CLS model’s predictions, using a remember/know test: Increasing
list strength reduced recollection-based discrimination but did not reduce familiarity-based discrimination. |
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