Grit: The Power of Passion and Perseverance · chapter 2 · id grit-c2-01-grit-predicts-success-better-t
“Grit predicts success better than talent or IQ, as demonstrated across multiple domains including West Point, spelling bees, and sales.”
CONTESTEDconfidence: high⚠ extracted by pipeline, re-audit pending
Receipts
Duckworth et al. (2007), JPSP 92(6), 1087-1101DOI registry: valid
Grit accounted for significant incremental variance in success outcomes over and beyond IQ in all samples.
Crede, Tynan & Harms (2017), JPSP 113(3), 492-511source alive
Based on 88 independent samples (N = 66,807), grit is only moderately correlated with performance. The construct validity of grit is in question given its very strong overlap with conscientiousness (rho = .84 for perseverance subscale).
Gonzalez et al. (2020), Journal of Research in Personality 89paywalled · manual check queued
Grit and conscientiousness represent another jangle fallacy -- two labels for essentially the same construct.
This claim is a stable, citable object. If you can falsify a verdict, tell us. Corrections are loud here.