Mechanisms of Self-Control Failure: Motivation and Limited Resources

TLDR

Prior research shows that self‑control exertion depletes self‑control strength, leading to poorer subsequent performance, and that depletion and motivation jointly influence self‑control outcomes. The study investigates whether motivation moderates the depletion effect on self‑control performance. The experiments showed that motivation mitigates the depletion effect, with depleted participants performing better on self‑control tasks when motivated, while depletion does not affect non‑self‑control tasks, suggesting that motivation can compensate for limited self‑control resources.

Abstract

Research has found that individuals who are lower in self-control strength because of previous self-control exertions perform more poorly on subsequent tests of self-control. The present studies suggest that this effect may be moderated by motivation. In particular, depletion and motivation jointly determine self-control performance. Individuals who were depleted and believed that the task would help others (Experiment 1) or believed that their efforts could benefit them (Experiment 2) performed better on a subsequent test of self-control than individuals who were depleted and lower in motivation. The results of Experiment 3 replicated these findings and suggested that depletion only affects performance on tasks that require self-control; tasks that are difficult but do not require self-control are immune to the effects of depletion. Hence, depleted individuals may compensate for their lack of self-control resources when sufficiently motivated. The results may help explain the nature of self-control strength.