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Mean (±SEM) percent time freezing during a 5min test of conditioned fear following pre-training drug infusion (Experiment 3). Comparisons reflect a one-way ANOVA for group (Pooled Alt-Pre, Pre Scop and Pre PBS). Pre-training scopolamine significantly impaired CPFE performance on the testing day. Asterisks indicate significance relative to Pre PBS group. *** = p < .001
