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This is a Quantitative Study study.

Vocabulary Demands of Open Access Academia: A YouTube Corpus Study

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This corpus study assesses vocabulary needs in academic lectures on YouTube, highlighting implications for English education.

Students need knowledge of 2000 most frequent word families to achieve 90% coverage of academic content.
Coverage for 95% and 98% requires knowledge of 4000 and 8000 word families, respectively.
The study analyzed a 58-million-word corpus from 9430 YouTube academic video transcripts across various disciplines.
Establishing vocabulary demands can inform targeted instruction in English for Academic Purposes pedagogy.

Larry Grullon‐Polanco (2025) studied this question.

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