Auditory precision hypothesis-L2: dimension-specific relationships between auditory processing and second language learning

Saito, Kazuya and Kachlicka, Magdalena and Suzukida, Yui and Petrova, Katya and Lee, B. and Tierney, Adam (2022) Auditory precision hypothesis-L2: dimension-specific relationships between auditory processing and second language learning. Cognition 229 , ISSN 0010-0277.

Abstract

Growing evidence suggests a broad relationship between individual differences in auditory processing ability and the rate and ultimate attainment of language acquisition throughout the lifespan, including post-pubertal second language (L2) speech learning. However, little is known about how the precision of processing of specific auditory dimensions relates to the acquisition of specific L2 segmental contrasts. In the context of 100 late Japanese-English bilinguals with diverse profiles of classroom and immersion experience, the current study set out to investigate the link between the perception of several auditory dimensions (F3 frequency, F2 frequency, and duration) in non-verbal sounds and English [r]-[l] perception and production proficiency. Whereas participants' biographical factors (the presence/absence of immersion) accounted for a large amount of variance in the success of learning this contrast, the outcomes were also tied to their acuity to the most reliable, new auditory cues (F3 variation) and the less reliable but already-familiar cues (F2 variation). This finding suggests that individuals can vary in terms of how they perceive, utilize, and make the most of information conveyed by specific acoustic dimensions. When perceiving more naturalistic spoken input, where speech contrasts can be distinguished via a combination of numerous cues, some can attain a high-level of L2 speech proficiency by using nativelike and/or non-nativelike strategies in a complementary fashion.

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