Yazin, Fahd and Das, Moumita and Banerjee, Arpan and Roy, Dipanjan (2021) Contextual Prediction Errors Reorganize Naturalistic Episodic Memories in Time. Sci Rep, 11 (1). p. 12364.

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Abstract

Episodic memories are contextual experiences ordered in time. This is underpinned by associative binding between events within the same contexts. The role of prediction errors in declarative memory is well established but has not been investigated in the time dimension of complex episodic memories. Here we combine these two properties of episodic memory, extend them into the temporal domain and demonstrate that prediction errors in diferent naturalistic contexts lead to changes in the temporal ordering of event structures in them. The wrongly predicted older sequences were weakened despite their reactivation. Interestingly the newly encoded sequences with prediction errors, seen once, showed accuracy as high as control sequences which were viewed repeatedly without change. Drift–difusion modelling revealed a lower decision threshold for the newer sequences than older sequences, refected by their faster recall. Moreover, participants’ adjustments to their decision threshold signifcantly correlated with their relative speed of sequence memory recall. These results suggest a temporally distinct and adaptive role for prediction errors in learning and reorganizing episodic temporal sequences.

Item Type:	Article
Subjects:	Neurodegenerative Disorders Neuro-Oncological Disorders Neurocognitive Processes Neuronal Development and Regeneration Informatics and Imaging Genetics and Molecular Biology
Depositing User:	Dr. D.D. Lal
Date Deposited:	03 Aug 2021 07:23
Last Modified:	13 Dec 2021 05:15
URI:	http://nbrc.sciencecentral.in/id/eprint/732

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