Ego Depletion and Self-Control Failure: An Energy Model of the Self's Executive Function

The ability of the self to alter its own responses, including thoughts, emotions, impulsive behaviors, and performances, is powerfully adaptive, and failures of self-control contribute to most personal and social problems. A program of laboratory studies suggests that self-control depends on a limited resource, akin to energy or strength. Acts of self-control and, more generally, of choice and volition deplete this resource, thereby impairing the self's ability to function. These effects appear after seemingly minor exertions because the self tries to conserve its remaining resources after any depletion. Rest and positive affect help restore the self's resources.