This paper was revised from the second author's Master's thesis (The effects of lexical competitor on Korean speakers' vowel articulation). The current version reports new data analysis and new findings redirected with more streamlined backgrounds and discussions. At the time of submission, an abstract of this work is being reviewed for the HISPhonCog 2023 conference presentation (to be held on May 26-27, 2023). We thank three anonymous reviewers for their constructive feedback. All remaining errors are our own. **
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