We (1) propose that evidence linking grit and performance is mixed because the measure used to assess grit—the Short Grit (Grit-S) scale (2)—captures only perseverance, not passion, whereas the definition of grit encompasses both perseverance and passion (3). Our studies find that the combination of perseverance (measured through the whole Grit-S scale) and passion (measured through the passion attainment scale) predicted higher performance.
Jachimowicz, J.M., A. Wihler, E.R. Bailey, and Adam Galinsky. "Reply to Guo et al. and Crede: Grit-S scale measures only perseverance, not passion, and its supposed subfactors are merely artifactors." Proceedings of the National Academy of Sciences 116, no. 10 (2019): 3942-3944.
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