The grit effect: predicting retention in the military, the workplace, school and marriage
Eskreis-Winkler, L., Shulman, E. P., Beal, S. A., & Duckworth, A. L. (2014). 'The grit effect: predicting retention in the military, the workplace, school and marriage.' Frontiers in Psychology, 5, article 36. doi:10.3389/fpsyg.2014.00036. Study 1, Army Special Operations Forces selection, N = 677, a 24-day course, 58 per cent completing: grit uncorrelated with general intelligence and physical fitness; full-model variance explained grit 1.84 per cent, general intelligence 2.67 per cent, physical fitness 7.28 per cent; a hierarchical model entering grit last confirmed it added significantly. GENUINE INCREMENTAL VALIDITY OVER THE ARMY'S OWN PREDICTORS AND ALSO ABOUT FOUR TIMES SMALLER THAN FITNESS; both facts are in the article. Study 2, sales employees at a vacation ownership corporation, N = 442, 45 per cent retained: grit the only personality variable to reach significance, odds ratio 1.38 bivariate and 1.40 in the full model, conscientiousness falling to 1.03 with zero per cent unique variance, so the book's equality claim is accurate and conservative; the caveat is that weeks already employed had an odds ratio of 2.78 and explained 23.47 per cent of the variance against grit's 3.30 per cent. Study 3, Chicago public school juniors, N = 4,813, not used in the article beyond the general retention picture; its
Eskreis-Winkler, L., Shulman, E. P., Beal, S. A., & Duckworth, A. L. (2014). 'The grit effect: predicting retention in the military, the workplace, school and marriage.' Frontiers in Psychology, 5, article 36. doi:10.3389/fpsyg.2014.00036. Study 1, Army Special Operations Forces selection, N = 677, a 24-day course, 58 per cent completing: grit uncorrelated with general intelligence and physical fitness; full-model variance explained grit 1.84 per cent, general intelligence 2.67 per cent, physical fitness 7.28 per cent; a hierarchical model entering grit last confirmed it added significantly. GENUINE INCREMENTAL VALIDITY OVER THE ARMY'S OWN PREDICTORS AND ALSO ABOUT FOUR TIMES SMALLER THAN FITNESS; both facts are in the article. Study 2, sales employees at a vacation ownership corporation, N = 442, 45 per cent retained: grit the only personality variable to reach significance, odds ratio 1.38 bivariate and 1.40 in the full model, conscientiousness falling to 1.03 with zero per cent unique variance, so the book's equality claim is accurate and conservative; the caveat is that weeks already employed had an odds ratio of 2.78 and explained 23.47 per cent of the variance against grit's 3.30 per cent. Study 3, Chicago public school juniors, N = 4,813, not used in the article beyond the general retention picture; its
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Eskreis-Winkler, L., Shulman, E. P., Beal, S. A., & Duckworth, A. L. (2014). The grit effect: predicting retention in the military, the workplace, school and marriage. Frontiers in Psychology, 5, article 36.