Abstract
ABSTRACT For multilingual English as an additional language learners (EALLs), listening is a critical skill that they must master. This quasi-experimental study examined if playback speed, overall English proficiency, and listening sub-scores affected the listening comprehension of EALLs. It also addressed if any of these effects were moderated by certain background and experiential factors. Data sources included a survey, listening comprehension sub-scores, overall English proficiency scores (TOEFL), and two listening comprehension test scores based on a set of easier and harder questions. Before taking the listening comprehension test, 168 students in English-medium institutions in Turkey and China listened to a 10-minute TED-talk YouTube video at three playback speed levels (slower: 0.75; default/normal: 1; faster: 1.25). Several statistically significant differences were obtained between the three groups regarding these measures. Results suggested that the playback speed and proficiency levels (both overall proficiency and listening sub-scores) matter both for the easier and harder comprehension questions. Implications of these findings for additional language education are described. Through the use of playback speed manipulation, this study underscores the crucial role customized instructional approaches play in enhancing listening comprehension for EALLs on video platforms like YouTube.
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