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Dynamics of brain activity reveal a unitary recognition signal.

Christoph Weidemann, Michael J. Kahana

Journal of Experimental Psychology: Learning, Memory, and Cognition, Volume: 45, Issue: 3, Pages: 440 - 451

Swansea University Author: Christoph Weidemann

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DOI (Published version): 10.1037/xlm0000593

Abstract

Dual-process models of recognition memory typically assume that independent familiarity and recollec-tion signals with distinct temporal profiles can each lead to recognition (enabling 2 routes to recognition),whereas single-process models posit a unitary “memory strength” signal. Using multivariate...

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Published in: Journal of Experimental Psychology: Learning, Memory, and Cognition
ISSN: 0278-7393 1939-1285
Published: American Psychological Association (APA) 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa40770
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Abstract: Dual-process models of recognition memory typically assume that independent familiarity and recollec-tion signals with distinct temporal profiles can each lead to recognition (enabling 2 routes to recognition),whereas single-process models posit a unitary “memory strength” signal. Using multivariate classifierstrained on spectral electroencephalogram (EEG) features, we quantified neural evidence for recognitiondecisions as a function of time. Classifiers trained on a small portion of the decision period performedsimilarly to those also incorporating information from previous time points indicating that neural activityreflects an integrated evidence signal. We propose a single-route account of recognition memory that iscompatible with contributions from familiarity and recollection signals, but relies on a unitary evidencesignal that integrates all available evidence.
College: Faculty of Medicine, Health and Life Sciences
Issue: 3
Start Page: 440
End Page: 451

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