Grit: The Power of Passion and Perseverance · chapter 9 · id grit-c9-01-a-growth-mindset----the-belief

“A growth mindset -- the belief that abilities can be developed -- is essential to grit. Duckworth explicitly connects Dweck's growth mindset theory to grit development.”

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Sisk, Burgoyne, Sun, Butler & Macnamara (2018), Psychological Science 29(4), 549-571DOI registry: valid

Growth mindset interventions showed a small meta-analytic effect on academic achievement (d = 0.08, 95% CI [0.02, 0.14]). About 1/3 of studies did not verify whether the intervention actually changed mindset.

Sisk et al. (2018), Psychological Science 29(4), two meta-analysespaywalled — manual check queued

Overall effects of mindset on achievement were weak for both observational and intervention meta-analyses. Some results supported specific tenets for low-SES or at-risk students, but general effects were minimal.

This claim is a stable, citable object. If you can falsify a verdict, tell us — corrections are loud here.