“…This state-of-the-art review provided suggestions for future research which include the development of a structural model of AR experience and a standardized methodology of assessing the impact of AR, the need for deeper understanding of the different strategies in AR usage and its playful character for enhancing language learning and the reconsideration of instructional design with AR. Examples of research foci to be exploited in future studies include the investigation of the relationship between enjoyment, engagement, motivation and learning performance in AR activities (Chen & Chan, 2019;Yilmaz et al, 2017), the alignment of different learning strategies while using AR for different cognitive styles (Ho et al, 2017), and the role of cognitive load in learning performance with consideration of motivational factors (Cheng, 2017). To this aim, new measures and methodologies can be added in the toolbox of AR researchers such as neuro-imaging techniques and thinking aloud research method, for capturing learners' perceptions of AR (Cheng, 2017).…”