Abstract
Research has proved learner engagement is a strong predictor of academic achievement, especially in the online learning environment. The lack of any reliable and valid instrument to measure this construct in the context of online education made the researchers of the current study develop and validate a potential measurement inventory to assess EFL learners' engagement in the online learning environment. For this purpose, a comprehensive review of the related literature and careful investigation of the existing instruments were carried out to find the theoretical constructs for learner engagement which led to the development of a 56-item Likert scale questionnaire. The newly developed questionnaire was piloted with 560 female and male EFL university students selected based on nonprobability convenience sampling. The results of the factor analysis indicated the reduction of items to 48 loaded on three main components, namely behavioral engagement (15 items), emotional engagement (16 items), and cognitive engagement (17 items). The results also revealed that the newly developed questionnaire enjoyed a reliability index of 0.925. The findings of the current study will undoubtedly help teaching practitioners assess EFL learners' engagement in the online learning context and make principled decisions when it comes to learners' engagement.