Evaluation Methods and Metrics for Extended Reality in Language Learning a Systematic Review

he rapid integration of extended reality (XR)in education highlights a critical fragmentation and lack ofstandardization in evaluation methodologies, which currentlyhinders direct comparisons across studies. This systematic reviewaims to address this gap by establishing a structured overviewof existing evaluation practices and defining clear directions forstandardized assessments in XR-based education. Focusing on 32peer-reviewed articles published between 2020 and 2025 acrossmajor databases, including IEEE Xplore, Scopus, ACM DigitalLibrary, and Google Scholar, this study categorizes evaluativepractices into three primary dimensions: human-computer inter-action (HCI/UX), learning outcomes, and presence or immersion.The findings reveal a significant trend where existing researchprioritizes only two of these dimensions simultaneously, therebypreventing a holistic view of XR efficacy. Furthermore, the analy-sis highlights a critical shortage of longitudinal studies necessaryto validate long-term knowledge retention. In conclusion, thispaper argues that a unified, holistic evaluation framework isessential to bridge these disparate metrics and fully understandXR’s impact on education. Future research should prioritize lon-gitudinal methodologies and the integration of multi-dimensionalevaluation frameworks to provide a standardized direction fordesigning assessments in immersive learning environments.