A Multisite Preregistered Paradigmatic Test of the Ego-Depletion Effect

Posted on 15.09.2021 - 12:07

We conducted a preregistered multilaboratory project (k = 36; N = 3,531) to assess the size and robustness of ego-depletion effects using a novel replication method, termed the paradigmatic replication approach. Each laboratory implemented one of two procedures that was intended to manipulate self-control and tested performance on a subsequent measure of self-control. Confirmatory tests found a nonsignificant result (d = 0.06). Confirmatory Bayesian meta-analyses using an informed-prior hypothesis (δ = 0.30, SD = 0.15) found that the data were 4 times more likely under the null than the alternative hypothesis. Hence, preregistered analyses did not find evidence for a depletion effect. Exploratory analyses on the full sample (i.e., ignoring exclusion criteria) found a statistically significant effect (d = 0.08); Bayesian analyses showed that the data were about equally likely under the null and informed-prior hypotheses. Exploratory moderator tests suggested that the depletion effect was larger for participants who reported more fatigue but was not moderated by trait self-control, willpower beliefs, or action orientation.


Vohs, Kathleen D.; Schmeichel, Brandon J.; Lohmann, Sophie; Gronau, Quentin F.; Finley, Anna J.; Ainsworth, Sarah E.; et al. (2021): A Multisite Preregistered Paradigmatic Test of the Ego-Depletion Effect. SAGE Journals. Collection. https://doi.org/10.25384/SAGE.c.5619299.v1
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Psychological Science


Kathleen D. Vohs
Brandon J. Schmeichel
Sophie Lohmann
Quentin F. Gronau
Anna J. Finley
Sarah E. Ainsworth
Jessica L. Alquist
Michael D. Baker
Ambra Brizi
Angelica Bunyi
Grant J. Butschek
Collier Campbell
Jonathan Capaldi
Chuting Cau
Heather Chambers
Nikos L. D. Chatzisarantis
Weston J. Christensen
Samuel L. Clay
Jessica Curtis
Valeria De Cristofaro
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