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Effects of Orthographic Input and Inhibitory Control on Second-Language Speech Production.

Jeong-Im Han¹, Song Yi Kim², Joo-Yeon Kim³

¹Department of English, Konkuk University, Korea.

Language and Speech

|September 6, 2024

Summary

Korean learners of English showed that spelling affects vowel sound duration, with single letters producing shorter sounds than double letters. This orthographic effect was not observed for consonants or linked to inhibitory control.

Keywords:

L1 Korean L2 English Orthographic effects inhibitory control speech production

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Area of Science:

Linguistics
Second Language Acquisition
Phonetics

Background:

Orthographic variations can influence sound duration in second language (L2) production.
Korean learners of English present a unique case due to differing orthographic systems and phonemic contrasts.

Purpose of the Study:

To investigate how orthographic forms (single vs. double letters) affect English vowel and consonant duration in L2 Korean speakers.
To examine the role of individual differences in inhibitory control on these orthographic effects.

Main Methods:

Sequential bilinguals (L1 Korean, L2 English) performed a delayed repetition task.
Word pairs with identical sounds but varied spellings (one vs. two letters) were used.
Acoustic analysis measured sound duration.

Main Results:

Korean learners produced English vowels with significantly shorter durations when spelled with a single letter compared to double letters or digraphs.
This orthographic effect on duration was not observed for English consonants.
Individual differences in inhibitory control did not show a strong correlation with the observed orthographic effects on vowel production.

Conclusions:

Orthography significantly impacts L2 English vowel production duration for Korean learners, specifically related to grapheme representation.
Consonant production duration appears less susceptible to these specific orthographic influences in this learner group.
Inhibitory control is not a primary factor mediating the influence of orthography on L2 vowel duration for Korean learners.