Ego Depletion Does Not Interfere With Working Memory Performance

Area of Science:

• Psychology
• Cognitive Psychology
• Social Psychology

Background:

• Ego depletion theory posits that exerting self-control diminishes subsequent self-regulatory capacity.
• Prior research suggested ego depletion impacts both self-control and working memory.
• Recent meta-analyses have questioned the link between ego depletion and working memory deficits.

Purpose of the Study:

• To investigate whether ego depletion influences working memory performance.
• To rigorously test the widely held assumption that ego depletion impairs cognitive functions beyond immediate self-control.

Main Methods:

• Ego depletion was induced using two established tasks: an e-crossing task and a Stroop task.
• Working memory capacity was assessed using the letter-number sequencing task.
• A large, heterogeneous sample (N = 1,385) was employed, with analyses controlling for implicit theories of willpower and dispositional self-control.

Main Results:

• No statistically significant evidence was found to support the hypothesis that ego depletion interferes with working memory performance.
• The null finding was robust, supported by a large sample size, diverse depletion methods, and comprehensive analytical strategies.

Conclusions:

• This study strengthens the evidence that while ego depletion affects self-control, it does not impair working memory.
• The findings challenge previous assumptions and suggest a more nuanced understanding of ego depletion's cognitive consequences.