Abstract:
:Many decisions are based on an internal model of the world. Yet, how such a model is constructed from experience and represented in memory remains unknown. We test the hypothesis that reward shapes memory for sequences of events by retroactively prioritizing memory for objects as a function of their distance from reward. Human participants encountered neutral objects while exploring a series of mazes for reward. Across six data sets, we find that reward systematically modulates memory for neutral objects, retroactively prioritizing memory for objects closest to the reward. This effect of reward on memory emerges only after a 24-hour delay and is stronger for mazes followed by a longer rest interval, suggesting a role for post-reward replay and overnight consolidation, as predicted by neurobiological data in animals. These findings demonstrate that reward retroactively prioritizes memory along a sequential gradient, consistent with the role of memory in supporting adaptive decision-making.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Braun EK,Wimmer GE,Shohamy Ddoi
10.1038/s41467-018-07280-0subject
Has Abstractpub_date
2018-11-20 00:00:00pages
4886issue
1issn
2041-1723pii
10.1038/s41467-018-07280-0journal_volume
9pub_type
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