The rapid spread of English medium instruction (EMI) across the globe has led to a growing number of non-native lecturers teaching in English to student populations that are increasingly international. The aim of the present study was to investigate to what extent lecturers with slight or moderate Dutch accents or native British English accents are evaluated differently in terms of intelligibility, comprehensibility and attitudinal impressions by non-native and native English-speaking listeners. In an experiment, 189 Dutch listeners, 175 international non-native listeners and 158 native English listeners evaluated fragments recorded by moderately accented Dutch, slightly accented Dutch and native English speakers. Findings showed that the moderately non-native accented lecturers were evaluated more negatively than lecturers with slight or native accents by both Dutch and international non-native listeners, but not by native English listeners. This suggests that non-native listeners evaluate the accents of non-native lecturers according to native speaker pronunciation norms.

英语中等语言教学（EMI）在全球范围内的迅速发展，导致越来越多的非本地讲师向越来越国际化的学生群体提供英语英语教学。本研究的目的是调查非母语和英语为母语的英语听众在讲授荷兰语或中度英语或母语英语的讲师在清晰度，可理解性和态度印象方面的不同程度。在一个实验中，有189位荷兰听众，175位国际非本地听众和158位英语母语听众评估了由中度荷兰语，略带荷兰语和英语母语者录制的片段。研究结果表明，荷兰人和国际非本地听众对中度非本地化口语的讲师的评价比带有轻微或本地口音的讲师要差得多，而英语为母语的听众则没有。这表明，非母语的听众会根据母语使用者的发音规范来评估非母语的讲师的口音。