The domain-specific grammar grit questionnaire: a cross-cultural validation study

This cross-cultural validation study aimed to develop and validate the Domain-Specific Grammar Grit Questionnaire (DSGGQ) among Iranian and Polish university students majoring in English. The DSGGQ was developed based on the L2 grit scale proposed by Teimouri, Plonsky and Tabandeh (2022. "L2 grit: Passion and perseverance for second-language learning." Language Teaching Research 26 (5): 893-918. https://doi.org/10.1177/1362168820921895) and administered to a total of 807 participants, 440 from Poland and 367 from Iran. The data underwent confirmatory factor analysis (CFA) to assess the scale's psychometric characteristics. The differences in the levels of grit between the Polish and Iranian students were also explored. The results demonstrated that the DSGGQ has satisfactory psychometric properties, and its structure proved to be invariant across nationality, gender, and age group. In addition, there were significant differences in grit levels between the two groups. Findings of this study suggest that the DSGGQ can be a useful tool for measuring grit in the domain of English grammar learning and can be applied in different cultural contexts.