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• W2904676870 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." @default.
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• W2904676870 date "2018-12-14" @default.
• W2904676870 modified "2023-10-17" @default.
• W2904676870 title "Offline replay supports planning in human reinforcement learning" @default.
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• W2904676870 doi "https://doi.org/10.7554/elife.32548" @default.
• W2904676870 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6303108" @default.
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• W2904676870 hasPublicationYear "2018" @default.
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