English medium instruction, EAP/ESP: Exploring overlap and divergences in research aims

English medium instruction (EMI) is now a well‐established field of education research, yet its distinction from English for academic purposes (EAP) and from English for specific purposes (ESP) remains a subject of debate. This scoping review investigates the overlap and divergences between these fields. As well as using raw data from a previous systematic review of EMI, we identified research questions published in five selected journals between 2017 and 2022: Journal of English for Academic Purposes, English for Specific Purposes, International Journal of Bilingual Education and Bilingualism, Language and Education, and Journal of Multilingual and Multicultural Development in order to identify the convergence and divergence in academic interest areas. We additionally examined research settings and participants across these studies. Our findings revealed a spectrum of research questions with largely distinct areas of research interest and considerable differences in research settings. This study contributes to the academic discussion by offering a detailed picture of the current research landscape, and suggests not only a need for collaboration between EMI, and EAP/ESP researchers but also a value in maintaining some distinction between the two fields. 論文の要旨 英語を媒介言語とする教育 (EMI) は、現在、教育研究の確立された分野でありますが、学術目的の英語 (EAP) および特定目的の英語 (ESP) からの区別は、依然として議論の対象となっています。このスコーピングレビューは、これらの分野間の重複と相違点を調査することを目標とします。本研究ではEMIに関する以前の系統的レビュー (2012年以降) からのデータに加えて、2017年から2022年の間に選出された5つのジャーナル (Journal of English for Academic Purposes, English for Specific Purposes, International Journal of Bilingual Education and Bilingualism, Language and Education, and Journal of Multilingual and Multicultural Development) に掲載されたEMIとEAP/ESPの論文の研究質問 (リサーチクエスチョン) と研究設定 (リサーチコンテキスト) を特定し、分野間の学術的関心領域の重複と相違点を特定しました。この研究を通してEMIおよびEAP/ESP研究者間の協力の必要性を唱える一方で、2つの学術分野間の明確な区分も重要であることを示唆します。