Past research suggests that self-control lapses occur more frequently following demanding experiences in daily life. However, the reason for these effects is debated. Three studies were therefore conducted to better understand self-control lapses. Exploratory analyses were conducted in Study 1 to identify possible effects. Studies 2 and 3 evaluated these effects' reliability. Two patterns were identified. First, initial desire-goal conflict predicted later increases in subjective fatigue. This was in turn related to less effective self-control attempts. Second, initial self-control attempts also led participants to enact desires more frequently. This latter effect occurred even when (and perhaps especially when) those later desires were not resisted. In contrast, the strength model of self-control did not receive support, as initial self-control attempts did not affect the success of subsequent self-control attempts. These studies therefore suggest initial self-control does play an important role in producing later self-control lapses-just a different role than predicted by the strength model.
Keywords: daily life; ego depletion; fatigue; self-control.