Grit scale development and validation using rasch model: cross-cultural adaptation

Introduction: Grit is a psychological trait that has received significant attention in various studies, particularly in an academic context. This trait is considered an important factor for student success in academic fields. Objective: The purpose of this study was to develop and validate a Grit Scale adapted from Duckworth’s Grit-O scale to measure the grit level of university students. Methodology: The methodology used in this research is quantitative. The data collection instrument uses the Grit-O scale with a total of 12 items. The sample in this study amounted to 461 students spread across several regions of Indonesia. Data analysis used the Rasch Model, namely Winstep software. Results: Data analysis showed the item reliability index was 0.99. The polarity angle of the items indicates that each item can contribute to student grit because the point-measure correlation value for each item is between 0.33 and 0.55. The item ideality test on the instrument shows that the item outline can be used. Discussion: Overall, the Grit-O scale developed for students has good validity and reliability. Therefore, the Grit-O scale adapted for Indonesian society can measure the level of grit that exists in students in the construct of consistency of interest and persistence in trying. Conclusions: The Indonesian version of the Grit-O scale items has high validity and reliability, so they can be used to measure student grit at university.