This article reviews evidence indicating that there is a temporal pattern to the experience of regret. Actions, or errors of commission, generate more regret in the short term; but inactions, or errors of omission, produce more regret in the long run. The authors contend that this temporal pattern is multiply determined, and present a framework to organize the divergent causal mechanisms that are responsible for it. In particular, this article documents the importance of psychological processes that (a) decrease the pain of regrettable action over time, (b) bolster the pain of regrettable inaction over time, and (c) differentially affect the cognitive availability of these two types of regrets. Both the functional and cultural origins of how people think about regret are discussed.

Three sets of studies provide evidence for an illusion of transparency, or a tendency for people to overestimate the extent to which others can discern their internal states. People often mistakenly believe that their internal states "leak out" more than they really do. The authors attribute this bias to a tendency for people to adjust insufficiently from the "anchor" of their own phenomenological experience when attempting to take another's perspective. Evidence for this illusion is provided by showing that liars overestimate the detectability of their lies (Studies la, lb, and lc) and that people believe their feelings of disgust are more apparent than they actually are (Studies 2a and 2b). A final pair of experiments (Studies 3a and 3b) explores the implications of the illusion of transparency for people's reluctance to intervene in emergencies. All 3 sets of studies also provide evidence consistent with the proposed anchoring and adjustment interpretation. Fans of Edgar Allan Poe will recall that the key passage in The TellTale Heart is one in which the protagonist does his best to play it cool during a conversation with three police officers. It is a performance made more difficult by the fact that the officers happen to be standing directly above the hidden body of the protagonist's murder victim. As he becomes increasingly anxious that the officers suspect his guilt, he begins to hear what he takes to be his victim's heart beating underneath the floorboards. He becomes convinced that the sound, which in reality is the beating of his own heart, can be heard by the officers as well. Eventually, his emotions get the best of him and he gives himself away:

Through telephone surveys, written questionnaires, and face-to-face interviews, it was found that people's biggest regrets tend to involve things they have failed to do in their lives. This conflicts with research on counterfactual thinking that indicates that people regret unfortunate outcomes that stem from actions taken more than identical outcomes that result from actions foregone. These divergent findings were reconciled by demonstrating that people's regrets follow a systematic time course: Actions cause more pain in the short-term, but inactions are regretted more in the long run. Support for this contention was obtained in 2 scenario experiments that assessed people's beliefs about the short- and long-term regrets of others and in an experiments that asked Ss about their own regrets of action and inaction from 2 time periods. Several mechanisms that can account for this temporal pattern are discussed.

This research provides evidence that people overestimate the extent to which their actions and appearance are noted by others, a phenomenon dubbed the spotlight effect. In Studies 1 and 2, participants who were asked to don a T-shirt depicting either a flattering or potentially embarrassing image overestimated the number of observers who would be able to recall what was pictured on the shirt. In Study 3, participants in a group discussion overestimated how prominent their positive and negative utterances were to their fellow discussants. Studies 4 and 5 provide evidence supporting an anchoring-and-adjustment interpretation of the spotlight effect. In particular, people appear to anchor on their own rich phenomenological experience and then adjust--insufficiently--to take into account the perspective of others. The discussion focuses on the manifestations and implications of the spotlight effect across a host of everyday social phenomena.

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