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Offline Replay Supports Planning: fMRI Evidence from Reward Revaluation

View ORCID ProfileIda Momennejad, A. Ross Otto, View ORCID ProfileNathaniel D. Daw, Kenneth A. Norman
doi: https://doi.org/10.1101/196758
Ida Momennejad
1Princeton Neuroscience Institute Princeton University,
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  • For correspondence: idam@princeton.edu
A. Ross Otto
2Department of Psychology McGill University,
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  • For correspondence: ross.otto@mcgill.ca
Nathaniel D. Daw
3Princeton Neuroscience Institute Princeton University,
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  • For correspondence: ndaw@princeton.edu
Kenneth A. Norman
4Princeton Neuroscience Institute Princeton University,
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  • For correspondence: knorman@princeton.edu
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Abstract

Making decisions in sequentially structured tasks requires integrating distally acquired information. The extensive computational cost of such integration challenges planning methods that integrate online, at decision time. Furthermore, it remains unclear whether “offline” integration during replay supports planning, and if so which memories should be replayed. Inspired by machine learning, we propose that (a) offline replay of trajectories facilitates integrating representations that guide decisions, and (b) unsigned prediction errors (uncertainty) trigger such integrative replay. We designed a 2-step revaluation task for fMRI, whereby participants needed to integrate changes in rewards with past knowledge to optimally replan decisions. As predicted, we found that (a) multi-voxel pattern evidence for off-task replay predicts subsequent replanning; (b) neural sensitivity to uncertainty predicts subsequent replay and replanning; (c) off-task hippocampus and anterior cingulate activity increase when revaluation is required. These findings elucidate how the brain leverages offline mechanisms in planning and goal-directed behavior under uncertainty.

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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 02, 2017.
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Offline Replay Supports Planning: fMRI Evidence from Reward Revaluation
Ida Momennejad, A. Ross Otto, Nathaniel D. Daw, Kenneth A. Norman
bioRxiv 196758; doi: https://doi.org/10.1101/196758
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Offline Replay Supports Planning: fMRI Evidence from Reward Revaluation
Ida Momennejad, A. Ross Otto, Nathaniel D. Daw, Kenneth A. Norman
bioRxiv 196758; doi: https://doi.org/10.1101/196758

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