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Mice alternate between discrete strategies during perceptual decision-making
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Mice alternate between discrete strategies during perceptual decision-making
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Journal Article
Mice alternate between discrete strategies during perceptual decision-making
2022
Overview
Classical models of perceptual decision-making assume that subjects use a single, consistent strategy to form decisions, or that decision-making strategies evolve slowly over time. Here we present new analyses suggesting that this common view is incorrect. We analyzed data from mouse and human decision-making experiments and found that choice behavior relies on an interplay among multiple interleaved strategies. These strategies, characterized by states in a hidden Markov model, persist for tens to hundreds of trials before switching, and often switch multiple times within a session. The identified decision-making strategies were highly consistent across mice and comprised a single ‘engaged’ state, in which decisions relied heavily on the sensory stimulus, and several biased states in which errors frequently occurred. These results provide a powerful alternate explanation for ‘lapses’ often observed in rodent behavioral experiments, and suggest that standard measures of performance mask the presence of major changes in strategy across trials.
The authors implement model-based analyses to uncover strategies used by mice and humans during sensory decision-making. Contrary to common wisdom, mice do not lapse and, instead, switch between sustained engaged and disengaged states.
Publisher
Nature Publishing Group US,Nature Publishing Group
