Decision speed and choice regret: When haste feels like waste

We test a metacognitive account of why larger choice sets often lead to greater regret, proposing that people apply the lay theory that “a quick choice is a bad choice” when evaluating how well they have chosen. Because people often operate under time pressure, larger sets are likely to entail a more cursory selection process than smaller sets, generating a feeling of having rushed the evaluation of the alternatives and heightened regret. Four studies show that choice-set size does not influence participants' regret when they believe that they had enough time to choose, that the subjective feeling of being rushed accounts for greater regret when choosing from larger sets, and that changing people's lay theories about choosing quickly eliminates regret.