The Grit Scale questionnaire has gained popularity over the past decade, not only in research but also in practical psychology and in employee selection. The questionnaire is used to measure grit—a personality trait combining perseverance in reaching goals and the consistency of one’s interests over time. HSE researchers have found a way to prove that grit is not a single personality trait and the Grit Scale measures two independent constructs. Their findings are published in the European Journal of Psychological Assessment.