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Paper Abstract and Keywords
Presentation 2019-06-13 14:45
Evaluation of Comprehensibility of L2 Speech Based on Native Listeners’ Reverse Shadowing and Their Facial Expressions
Tasavat Trisitichoke, Shintaro Ando, Daisuke Saito, Nobuaki Minematsu (UTokyo) SP2019-4
Abstract (in Japanese) (See Japanese page) 
(in English) Recently, researchers' attention has been paid to pronunciation assessment not based on comparison between L2 utterances and native models, but based on comprehensibility of the L2 utterances. In our previous studies, native listeners' shadowing was examined and it was shown that accuracy of articulation in shadowing utterances and delay of shadowing, both of which were acoustically calculated, are strongly influenced by the amount of cognitive load imposed for comprehending L2 utterances, especially for ones with strong accents.
In the current paper, aside from acoustic analysis of shadowings, we focus on shadowers' facial microexpressions and examine how they are correlated with perceived comprehensibility. To extract facial expression features, two methods are
tested. One is a computer-vision-based method and recorded videos of shadowers' facial expressions are analyzed. The other is a method using a physiological sensor and
subtle movements of facial muscles are detected.
In experiments, four shadowers' facial expressions are analyzed, each of whom shadowed approximately 800 L2 utterances. Results show that shadowers' facial expressions are highly correlated by perceived comprehensibility, and that kind of facial expressions is strongly shadower-dependent. These results indicate a high potential of shadowers' facial expressions for comprehensibility prediction.
Keyword (in Japanese) (See Japanese page) 
(in English) Pronunciation assessment / Comprehensibility / Shadowing / Facial expression / FACS / EMG / /  
Reference Info. IEICE Tech. Rep., vol. 119, no. 80, SP2019-4, pp. 19-24, June 2019.
Paper # SP2019-4 
Date of Issue 2019-06-06 (SP) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF SP2019-4

Conference Information
Committee SP  
Conference Date 2019-06-13 - 2019-06-13 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokyo Institute of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To SP 
Conference Code 2019-06-SP 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Evaluation of Comprehensibility of L2 Speech Based on Native Listeners’ Reverse Shadowing and Their Facial Expressions 
Sub Title (in English)  
Keyword(1) Pronunciation assessment  
Keyword(2) Comprehensibility  
Keyword(3) Shadowing  
Keyword(4) Facial expression  
Keyword(5) FACS  
Keyword(6) EMG  
Keyword(7)  
Keyword(8)  
1st Author's Name Tasavat Trisitichoke  
1st Author's Affiliation The University of Tokyo (UTokyo)
2nd Author's Name Shintaro Ando  
2nd Author's Affiliation The University of Tokyo (UTokyo)
3rd Author's Name Daisuke Saito  
3rd Author's Affiliation The University of Tokyo (UTokyo)
4th Author's Name Nobuaki Minematsu  
4th Author's Affiliation The University of Tokyo (UTokyo)
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Speaker Author-1 
Date Time 2019-06-13 14:45:00 
Presentation Time 25 minutes 
Registration for SP 
Paper # SP2019-4 
Volume (vol) vol.119 
Number (no) no.80 
Page pp.19-24 
#Pages 6 
Date of Issue 2019-06-06 (SP) 

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