Repeated-Measures Depletion Meta-Analysis & Neutral Manipulation  /

Development of a Within-Subject, Repeated-Measures Ego Depletion Paradigm: Inconsistent Results and Future Recommendations

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Description: The ego-depletion effect is currently under scrutiny for low replicability, possibly reflecting the limited statistical power available in between-subject designs. In response, we created a within-subject, repeated-measures ego-depletion paradigm that repeatedly alternated depletion and recovery manipulations. Each manipulation was followed by measuring subjective fatigue, mood, and self-control performance. Across twelve studies (N = 754), participants reliably reported having less energy and lower mood after depleting manipulations compared to after recovery manipulations. Depletion manipulations did not consistently affect behavioral self-control, although the small effect was meta-analytically significant (d = .045). Furthermore, unintended fatigue and practice effects occurred over the course of the paradigm, systematically interfering with the intended depletion effects. We recommend that depletion research take advantage of within-subject designs without using repeated-measures.

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