What question did this study set out to answer?

Investigate longitudinal changes in English vowel perception and production among advanced second-language learners over an 18-month period in an immersive university setting.

August 15, 2026Language and Speech

Tracking L2 English Vowel Perception and Production Among Graduate Professionals Over 18 Months

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Investigate longitudinal changes in English vowel perception and production among advanced second-language learners over an 18-month period in an immersive university setting.
Tracked 22 advanced-proficiency L2 English learners from diverse first-language backgrounds at 1, 3, 6, and 18 months following arrival in the United States.
Assessed vowel identification accuracy via a perception oddity task and vowel production intelligibility through listener ratings using Bayesian mixed-effects models.
Perception accuracy was high at baseline and showed significant improvement across most vowel contrasts within the first 6 months.
Production intelligibility exhibited minimal overall change over 18 months, with only one contrast demonstrating increased accuracy at the final time point alongside substantial individual variability.

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Implication

Longitudinal study reveals vowel perception improves faster than speech intelligibility in advanced L2 English learners, suggesting asymmetric phonetic development during immersion.

Cite This Study

Na et al. (2026) studied this question.

synapsesocial.com/papers/6a8037d975c2e31742c86f26 https://doi.org/10.1177/00238309261470734

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Implication

Longitudinal study reveals vowel perception improves faster than speech intelligibility in advanced L2 English learners, suggesting asymmetric phonetic development during immersion.

Tracking L2 English Vowel Perception and Production Among Graduate Professionals Over 18 Months

Key Points

Discussion

Implication

Cite This Study

Tracking L2 English Vowel Perception and Production Among Graduate Professionals Over 18 Months

Key Points

Discussion

Implication

Cite This Study

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