Language Testing in ESL&EFL Over the Past Two Decades: A Bibliometric Study

This study presents a comprehensive bibliometric analysis of ESL/EFL language testing research published between 2000 and mid-2024. Drawing on data retrieved from the Web of Science database, the study explores publication trends, citation impact, and institutional contributions across global contexts. It addresses three main research questions- identifying leading countries, authors, and institutions; examining shifts in global collaboration and research productivity; and analysing how ESL/EFL testing research has evolved across disciplines and regions. The findings highlight a significant increase in global research output, with China and Iran emerging as influential contributors alongside traditionally dominant countries such as the USA, UK, and Australia. The United States remains the most cited country, although its research output is widely distributed across multiple institutions. In contrast, countries such as China and Iran exhibit centralised growth. At the institutional level, the University of Melbourne and Islamic Azad University demonstrate strong and growing contributions. Citation patterns reveal the enduring influence of foundational research while also pointing to newer areas of inquiry, including AI-driven assessment and blockchain verification systems. However, despite growing interest, these technologies have not yet dominated citation metrics. The study also observes fluctuations in average annual citations, with peaks corresponding to key developments in assessment policy and technological adaptation—particularly during the COVID-19 pandemic. Overall, the analysis reveals the persistence of traditional academic powerhouses and the rising participation of emerging contributors. The study underscores the need for equitable global research partnerships and highlights the potential of technology to reshape the future of language assessment.