Grit: The Power of Passion and Perseverance · chapter 4 · id grit-c4-01-the-grit-scale-reliably-measur

“The Grit Scale reliably measures a single coherent construct of 'passion and perseverance for long-term goals' composed of two correlated factors.”

contestedconfidence: high⚠ extracted by pipeline, re-audit pending

Receipts

Duckworth et al. (2007), JPSP 92(6)DOI registry: valid

The Grit Scale showed adequate internal consistency (alpha = .85) and test-retest stability.

Crede et al. (2017), JPSP 113(3), 492-511source alive

The higher order structure of grit is not confirmed. The two facets (consistency of interests, perseverance of effort) show meaningfully different criterion validities, undermining the unified construct.

Jachimowicz et al. (2018), PNAS 115(40), 9980-9985paywalled — manual check queued

Self-rated consistency of interests does not correlate with other-rated passion, suggesting the Grit Scale's passion subscale may not actually measure passion.

Steinmayr et al. (2018), Frontiers in PsychologyFLAGGED: dead link (404)

Perseverance counts but consistency does not: perseverance of effort was associated with academic adjustment and engagement; consistency of interests was not significantly correlated with such outcomes.

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