There has been limited research on the efficacy of captioned second language (L2) television in facilitating the incidental acquisition of multiword expressions (MWEs). The present study aims to fill this gap. Additionally, this study examines the role of typographic enhancement and repetition. One-hundred and twenty-two L2 learners were assigned to one of six conditions that differed in terms of caption condition (no captions, normal captions, enhanced captions) and the number of times they watched the same video (once, twice). The participants took a cued MWE form recall test before watching the video, immediately and 2 weeks after watching it. A content comprehension test was also administered. Compared to single viewing, repetition resulted in better content comprehension as well as better acquisition of MWEs. Both caption types positively influenced MWE recall relative to watching the video without captions, but typographic enhancement reduced the benefits of captions for content comprehension.

中文翻译：

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通过视听材料意外获取多词表达

关于字幕第二语言 (L2) 电视在促进偶然获得多词表达 (MWE) 方面的功效的研究有限。本研究旨在填补这一空白。此外，本研究探讨了排版增强和重复的作用。122 名 L2 学习者被分配到在字幕条件（无字幕、正常字幕、增强字幕）和观看同一视频的次数（一次、两次）方面不同的六种条件之一。参与者在观看视频之前、观看视频后立即和 2 周后进行了提示 MWE 表格回忆测试。还进行了内容理解测试。与单次观看相比，重复可以更好地理解内容以及更好地获得 MWE。