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A new perspective on the interplay between self-control and cognitive performance: Modeling progressive depletion

Christoph Lindner1, Gabriel Nagy1, Wolfgang Andreas Ramos Arhuis1

  • 1Leibniz Institute for Science and Mathematics Education at Kiel University, Kiel, Germany.

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Self-control depletion impairs cognitive performance over time, especially in individuals with high trait self-control. This study offers new methods to investigate ego depletion effects and their moderators.

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Area of Science:

  • Psychology
  • Cognitive Science
  • Behavioral Science

Background:

  • The ego-depletion effect, where initial self-control use impairs subsequent performance, is a key concept in self-control research.
  • Recent findings suggest the ego-depletion effect may be more fragile than previously thought, necessitating refined research strategies.
  • The interaction between ego depletion and trait self-control remains unclear due to inconsistent study findings.

Purpose of the Study:

  • To investigate the ego-depletion effect on cognitive performance and effort using a novel approach.
  • To examine the moderating role of trait self-control on the ego-depletion effect.
  • To explore the relationship between trait self-control, motivation, and cognitive performance trajectories.

Main Methods:

  • Employed a sequential-task paradigm to induce ego depletion in 120 students across two sessions.
  • Assessed trait self-control and control variables in the first session.
  • Utilized a 30-minute computer-based mathematical problem-solving test to measure performance and effort trajectories, analyzed with multilevel modeling.

Main Results:

  • Trait self-control positively predicted motivation for cognitive tasks.
  • Ego depletion resulted in a progressive decline in cognitive performance.
  • The detrimental impact of ego depletion on performance was more pronounced in individuals with higher trait self-control.

Conclusions:

  • Self-control capacity wanes progressively during demanding tasks, impacting sustained performance.
  • Trait self-control moderates the ego-depletion effect, indicating individual differences in self-regulatory resilience.
  • The study introduces a robust methodology for examining dynamic ego-depletion effects and trait moderators, advancing self-control research.