Grit Assessment: Is One Dimension Enough?

Grit is one of the non-cognitive variables that has received the most attention in recent years given its relationship to and influence in various aspects of life. There are very few reliable, valid instruments to evaluate it in Spanish-speaking countries. Because of that, the aim of this study is the development and validation of a new scale to evaluate grit in Spanish-speaking contexts. We used a sample of 531 Spanish participants (60% women) from the general population (Myears = 38.60, SDyears = 14.90). We examined the structure and measurement invariance of the instrument. We calculated the instrument's reliability and obtained evidence of validity in relation to other variables. We examined the differences in grit as a function of gender and age. The factorial analyses confirmed the unidimensionality of the instrument, along with the measurement invariance of the scores with respect to sex and age. The new grit scale demonstrated excellent reliability (α = .94; ω = .94). We found clear evidence of validity in relation to other variables; the Grit short scale (r = .691), self-control (r = .595), self-efficacy (r = .703), and conscientiousness (r = .661). The new scale for evaluating grit (Oviedo Grit Scale) is essentially unidimensional, and scores produced by it exhibit excellent indicators of reliability and validity.