Dynamic emotional states shape the episodic structure of memory

Mason McClay, Matthew E. Sachs and David Clewett ()
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Mason McClay: University of California, Los Angeles, Department of Psychology
Matthew E. Sachs: Columbia University, Department of Psychology
David Clewett: University of California, Los Angeles, Department of Psychology

Nature Communications, 2023, vol. 14, issue 1, 1-16

Abstract: Abstract Human emotions fluctuate over time. However, it is unclear how these shifting emotional states influence the organization of episodic memory. Here, we examine how emotion dynamics transform experiences into memorable events. Using custom musical pieces and a dynamic emotion-tracking tool to elicit and measure temporal fluctuations in felt valence and arousal, our results demonstrate that memory is organized around emotional states. While listening to music, fluctuations between different emotional valences bias temporal encoding process toward memory integration or separation. Whereas a large absolute or negative shift in valence helps segment memories into episodes, a positive emotional shift binds sequential representations together. Both discrete and dynamic shifts in music-evoked valence and arousal also enhance delayed item and temporal source memory for concurrent neutral items, signaling the beginning of new emotional events. These findings are in line with the idea that the rise and fall of emotions can sculpt unfolding experiences into memories of meaningful events.

Date: 2023
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DOI: 10.1038/s41467-023-42241-2

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