Grit: The Power of Passion and Perseverance · chapter 11 · id grit-c11-06-activities-that-combine-challe

“Activities that combine challenge, autonomy, and skilled adult mentorship are the most effective at building grit-like qualities in young people.”

unsupportedconfidence: low⚠ extracted by pipeline, re-audit pending

Receipts

Forge Coaching - Extracurriculars and gritsource alive
Activities that provide deliberate practice opportunities, autonomy in choice, and supportive coaching are theorized to build grit.
Eisenberger (1992) - Learned Industriousness full textsource alive
Reinforcement of effortful behavior by supportive others increases the secondary reward value of effort, potentially building industriousness.
Crede (2018) - What Shall We Do About Grit?paywalled — manual check queued
No specific activity type or combination of features has been shown to reliably increase grit in controlled studies.

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