Skip to main content

Effects of visual speech information on native listener judgments of L2 speech consonants

Resource type
Thesis type
(Thesis) M.A.
Date created
Author: Kawase, Saya
Research on the intelligibility of non-native (L2) speech productions has focused on native listener judgments of auditorily presented L2 productions. However, little research has explored how visual information in L2 speech productions affects native listeners’ perception. In the present study, native Canadian English perceivers were asked to identify six English phonemes /b, v, s, θ, l, ɹ/ produced by native speakers of Japanese and native speakers of Canadian English as controls under three input modalities: (1) audiovisual (AV), with simultaneous presentation of speaker voice and facial/mouth movements, (2) audio-only (AO), with speaker voice only, and (3) visual-only (VO), with speaker face only. The results show facilitative effects of visual speech information on the intelligibility of non-native productions as well as deteriorative effects due to lack of visible lip-rounding in the Japanese-produced /ɹ/. These results suggest visual speech information may either positively or negatively affect the intelligibility of L2 productions.
Copyright statement
Copyright is held by the author.
The author has not granted permission for the file to be printed nor for the text to be copied and pasted. If you would like a printable copy of this thesis, please contact
Scholarly level
Supervisor or Senior Supervisor
Thesis advisor: Wang, Yue
Member of collection
Download file Size
etd7408_SKawase.pdf 1.1 MB

Views & downloads - as of June 2023

Views: 0
Downloads: 0