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Ambiguity and anxiety: when a glass half full is empty

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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Figure 1: Humans and other animals can accurately estimate the probability of danger from their experience of specific environments or cues and use this information to respond appropriately.

Ann Thompson

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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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