Humans and other animals use environmental cues to evaluate sources of danger and to react appropriately. A new study reports that mice lacking the serotonin 1a receptor overreact to ambiguous predictors of aversive events, whereas they respond normally to unambiguous predictors, illuminating the neural bases of contingency learning.
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Nader, K., Balleine, B. Ambiguity and anxiety: when a glass half full is empty. Nat Neurosci 10, 807–808 (2007). https://doi.org/10.1038/nn0707-807
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DOI: https://doi.org/10.1038/nn0707-807
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