Grit and language learning: construct validation of L2-Grit scale and its relation to later vocabulary knowledge

The present study aimed to empirically examine the validity of grit among language learners and its relation to vocabulary knowledge. Grit is defined as a trait that is characterised by a tendency to be passionate about and persevere towards the achievement of long-term goals. A newly developed questionnaire, L2-Grit Scale, which assesses perseverance of effort and consistency of interest in language learning was used. The construct validity was evaluated, and bi-factor CFA was supported. The convergent and divergent validity of the grit constructs were tested against operationalisations of related motivational constructs. The results suggest that the L2-Grit Scale is, reliable, valid and suitable for use in L2 research. With regard to predictive validity, grit has shown to have a non-significant direct effect on later vocabulary knowledge. Rather, initial grit was only indirectly associated with later vocabulary knowledge through the mediation role of later endorsement of grit.