From the study: > The Short Grit Scale (Duckworth & Quinn, 2009) was used as a measure of grit and was administered to most of the NLSY participants in 2013 (6

From the study: > The Short Grit Scale (Duckworth & Quinn, 2009) was used as a measure of grit and was administered to most of the NLSY participants in 2013 (6,476 of the original sample of 8,984 in 1997). It consists of 8 items in total, 4 items for each grit facet—perseverance and consistency of interest. Sample items are “I am diligent” (perseverance) and “new ideas and projects sometimes distract me from previous ones” (consistency of interest). Answers are given on a scale from 1 (very much like me) to 5 (not like me at all). This is like measuring intelligence by asking people whether they identify with statements like "I am a fast learner." Most people aren't very self-aware. I often find that people that work less hard (in general across a wide range of things) often self-identify as having more grit because people work hardest when they work on something they are motivated to do, but being able to work superficially in the absence of motivation for long periods of time makes people feel they have more grit. My suspicion is that grit (in the sense that matters, not whatever the grit researchers have been pushing) is mostly indistinguishable from intelligence as it's typically measured. I'd be shocked if most intelligence tests don't already do a better job of determining grit (in terms of the level of perseverance you could expect from someone) than asking someone if they are diligent.