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Burnette, Jeni L.; Billingsley, Joseph; Banks, George C.; Knouse, Laura E.; Hoyt, Crystal L.; Pollack, Jeffrey M.; Simon, Stefanie
Psychological bulletin, 03/2023, Volume: 149, Issue: 3-4Journal Article
As growth mindset interventions increase in scope and popularity, scientists and policymakers are asking: Are these interventions effective? To answer this question properly, the field needs to understand the meaningful heterogeneity in effects. In the present systematic review and meta-analysis, we focused on two key moderators with adequate data to test: Subsamples expected to benefit most and implementation fidelity. We also specified a process model that can be generative for theory. We included articles published between 2002 (first mindset intervention) through the end of 2020 that reported an effect for a growth mindset intervention, used a randomized design, and featured at least one of the qualifying outcomes. Our search yielded 53 independent samples testing distinct interventions. We reported cumulative effect sizes for multiple outcomes (i.e., mindsets, motivation, behavior, end results), with a focus on three primary end results (i.e., improved academic achievement, mental health, or social functioning). Multilevel metaregression analyses with targeted subsamples and high fidelity for academic achievement yielded, d = 0.14, 95% CI .06, .22; for mental health, d = 0.32, 95% CI .10, .54. Results highlighted the extensive variation in effects to be expected from future interventions. Namely, 95% prediction intervals for focal effects ranged from −0.08 to 0.35 for academic achievement and from 0.07 to 0.57 for mental health. The literature is too nascent for moderators for social functioning, but average effects are d = 0.36, 95% CI .03, .68, 95% PI −.50, 1.22. We conclude with a discussion of heterogeneity and the limitations of meta-analyses. Public Significance Statement Growth mindset interventions are increasing in popularity in education and are being applied to improving other areas of functioning as well; however, there is debate about how well they work. Despite the large variation in effectiveness, we found positive effects on academic outcomes, mental health, and social functioning, especially when interventions are delivered to people expected to benefit the most.
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