Psychometric Meta-Analysis of the Short Grit Scale Reliability Across Demographic Groups and Academic Settings

Abstract The current study is a reliability generalization meta-analysis of the Short Grit Scale (Grit-S). A total of 95,440 participants were found across 66 studies with 117 internal consistency coefficients. We present the average Cronbach coefficient alpha (α) for the total Grit-S and subscales, Consistency of Interest and Perseverance of Effort. The results include total sample percentages for participant characteristics and setting types in which researchers used the Grit-S. The alpha range (α = .68 − .73) indicates the Grit-S and individual subscales are suitable for basic research use but not clinical decision making. Additionally, studies were inconsistent with statistically significant results with participants outside the United States, and reliability coefficients reduced among nonwhite participants. Researchers should further study the reliability of Grit-S among diverse participants.