Dynamics of brain activity reveal a unitary recognition signal

Journal of Experimental Psychology. Learning, Memory, and Cognition
Christoph T Weidemann, Michael J Kahana

Abstract

Dual-process models of recognition memory typically assume that independent familiarity and recollection 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 classifiers trained on spectral electroencephalogram (EEG) features, we quantified neural evidence for recognition decisions as a function of time. Classifiers trained on a small portion of the decision period performed similarly to those also incorporating information from previous time points indicating that neural activity reflects an integrated evidence signal. We propose a single-route account of recognition memory that is compatible with contributions from familiarity and recollection signals, but relies on a unitary evidence signal that integrates all available evidence. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

Citations

Dec 6, 2021·NeuroImage·B S KatermanM J Kahana

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