In subsequent work, we have discovered individual differences in people’s abilities to harness this beneficial undoing effect of positive emotions. Specifically, we have found that people who score high on a self-report measure of psychological resilience (Block & Kremen, 1996) show faster cardiovascular recovery following negative emotional arousal than do those who score low on this measure. Moreover, this faster recovery is mediated by the positive emotions that highly resilient people bring to the situation. Resilient individuals experience more positive emotions than do their less resilient peers, both at ambient levels and in response to stressful circumstances. These positive emotions, in turn, allow then to bounce back quickly from negative emotional arousal (Tugade & Fredrickson, 2001). In effect, then, resilient individuals are expert users of the undoing effect of positive emotions.