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Mean skin conductance responses to the CS1, CS2, and CS3 trials during acquisition, memory reactivation, extinction, test, and generalization for the (a) yohimbine HCl–propranolol HCl and (b) placebo pill–propranolol HCl condition (ie, Experiment I), and the (c) propranolol HCl after reactivation group (ie, Experiment II). Error bars represent SEM.
