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Discovering event structure in continuous narrative perception and memory

Christopher Baldassano, Janice Chen, Asieh Zadbood, Jonathan W Pillow, Uri Hasson, Kenneth A Norman
doi: https://doi.org/10.1101/081018
Christopher Baldassano
Princeton University, Princeton Neuroscience Institute and Department of Psychology
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Janice Chen
Princeton University, Princeton Neuroscience Institute and Department of Psychology
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Asieh Zadbood
Princeton University, Princeton Neuroscience Institute and Department of Psychology
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Jonathan W Pillow
Princeton University, Princeton Neuroscience Institute and Department of Psychology
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Uri Hasson
Princeton University, Princeton Neuroscience Institute and Department of Psychology
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Kenneth A Norman
Princeton University, Princeton Neuroscience Institute and Department of Psychology
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Abstract

Summary During realistic, continuous perception, humans automatically segment experiences into discrete events. Using a novel model of neural event dynamics, we investigate how cortical structures generate event representations during continuous narratives, and how these events are stored and retrieved from long-term memory. Our data-driven approach enables identification of event boundaries and event correspondences across datasets without human-generated stimulus annotations, and reveals that different regions segment narratives at different timescales. We also provide the first direct evidence that narrative event boundaries in high-order areas (overlapping the default mode network) trigger encoding processes in the hippocampus, and that this encoding activity predicts pattern reinstatement during recall. Finally, we demonstrate that these areas represent abstract, multimodal situation models, and show anticipatory event reinstatement as subjects listen to a familiar narrative. Our results provide strong evidence that brain activity is naturally structured into semantically meaningful events, which are stored in and retrieved from long-term memory.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted October 14, 2016.
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Discovering event structure in continuous narrative perception and memory
Christopher Baldassano, Janice Chen, Asieh Zadbood, Jonathan W Pillow, Uri Hasson, Kenneth A Norman
bioRxiv 081018; doi: https://doi.org/10.1101/081018
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Discovering event structure in continuous narrative perception and memory
Christopher Baldassano, Janice Chen, Asieh Zadbood, Jonathan W Pillow, Uri Hasson, Kenneth A Norman
bioRxiv 081018; doi: https://doi.org/10.1101/081018

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