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|Abstract:||We provide evidence that decisions are made by consulting memories for individual past experiences, and that this process can be biased in favour of past choices using incidental reminders. First, in a standard rewarded choice task, we show that a model that estimates value at decision-time using individual samples of past outcomes fits choices and decision-related neural activity better than a canonical incremental learning model. In a second experiment, we bias this sampling process by incidentally reminding participants of individual past decisions. The next decision after a reminder shows a strong influence of the action taken and value received on the reminded trial. These results provide new empirical support for a decision architecture that relies on samples of individual past choice episodes rather than incrementally averaged rewards in evaluating options and has suggestive implications for the underlying cognitive and neural mechanisms.|
|Citation:||Bornstein, Aaron M, Khaw, Mel W, Shohamy, Daphna, Daw, Nathaniel D. (2017). Reminders of past choices bias decisions for reward in humans.. Nature communications, 8 (15958 - ?. doi:10.1038/ncomms15958|
|Type of Material:||Journal Article|
|Journal/Proceeding Title:||nature communications|
|Version:||Final published version. This is an open access article.|
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