Grit: The Power of Passion and Perseverance · chapter 4 · id grit-c4-03-the-short-grit-scale-grit-s-ha
“The Short Grit Scale (Grit-S) has a test-retest reliability of r = 0.68 over a one-year interval and internal consistency (Cronbach's alpha) between 0.73 and 0.83.”
TRUE, BUTconfidence: medium⚠ extracted by pipeline, re-audit pending
Receipts
Duckworth & Quinn (2009), Journal of Personality Assessmentsource alive
Test-retest reliability over one year was r = 0.68. Internal consistency ranged from alpha = 0.73 to 0.83 across samples.
PMC (2021) - Psychometric evaluation of Short Grit Scalesource alive
A closer look at the Grit-S factor structure revealed that the perseverance of effort subscale had below-conventional reliability (alpha = .60-.78) in several samples.
Duckworth & Quinn (2009), Journal of Personality Assessment (publisher page)paywalled · manual check queued
Evidence was presented for the Grit-S's internal consistency, test-retest stability, consensual validity with informant-report versions, and predictive validity.
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