“People high in conscientiousness get better grades in high school and college; they commit fewer crimes; and they stay married longer. They live longer— and not just because they smoke and drink less. They have fewer strokes, lower blood pressure, and a lower incidence of Alzheimer’s disease. “It would actually be nice if there were some negative things that went along with conscientiousness,” (Brent) Roberts told me. “But at this point it’s emerging as one of the primary dimensions of successful functioning across the lifespan. It really goes cradle to grave in terms of how well people do.”
“For each statement, respondents score themselves on a five-point scale, ranging from 5, “very much like me,” to 1, “not like me at all.” The test takes about three minutes to complete, and it relies entirely on self-report — and yet when Duckworth and Peterson took it out into the field, they found it was remarkably predictive of success. Grit, Duckworth discovered, is only faintly related to IQ — there are smart gritty people and dumb gritty people — but at Penn, high grit scores allowed students who had entered college with relatively low college-board scores to nonetheless achieve high GPAs. At the National Spelling Bee, Duckworth found that children with high grit scores were more likely to survive to the later rounds. Most remarkable, Duckworth and Peterson gave their grit test to more than twelve hundred freshman cadets as they entered the military academy at West Point and embarked on the grueling summer training course known as Beast Barracks. The military has developed its own complex evaluation, called the whole candidate score, to judge incoming cadets and predict which of them will survive the demands of West Point; it includes academic grades, a gauge of physical fitness, and a leadership potential score. But the more accurate predictor of which cadets persisted in Beast Barracks and which ones dropped out turned out to be Duckworth’s simple little twelve-item grit questionnaire.