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Paper Abstract and Keywords
Presentation 2008-03-21 15:45
Automatic scoring of language learners' utterances generated through shadowing based on bottom-up clustering
Naoya Shimomura, Nobuaki Minematsu (Univ. of Tokyo), Yutaka Yamauchi (Tokyo International Univ.), Keikichi Hirose (Univ. of Tokyo) SP2007-212
Abstract (in Japanese) (See Japanese page) 
(in English) Recently, shadowing has attracted much attention in the field of teaching and learning foreign languages.
Shadowing is a kind of ``repeat-after-me" type exercise but it requires learners to repeat each word before hearing its final syllable.
Shadowing is thought to raise both pronunciation and hearing abilities effectively.
Since learners have to follow the speaking rate of an input native utterance, especially in the case of beginners, their pronunciation often becomes inarticulate and corrupt.
To build an automatic scoring system of non-native utterances, HMMs which have been trained with native ``read" speech, are often used. In this study, considering two facts of shadowing; 1) the speaking style of learners in shadowing is very different from that of ``read" speech, 2) it is
desirable to build a scoring system which requires only an utterance pair; a native utterance presented to learners and a learner's utterance generated in response to the native utterance, a new method is proposed here for automatic scoring of utterances in shadowing.
The new method does not use any acoustic models such as HMMs at all and just compares the two utterances based on time-constrained bottom-up clustering.
Experiments show that rather good correlation is found between automatic scores and manually-rated scores (or TOEIC overall proficiency scores).
Keyword (in Japanese) (See Japanese page) 
(in English) shadowing / bottom-up clustering / automatic scoring / articulatory effort / support technology for teaching / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 551, SP2007-212, pp. 151-156, March 2008.
Paper # SP2007-212 
Date of Issue 2008-03-13 (SP) 
ISSN Print edition: ISSN 0913-5685    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 SP2007-212

Conference Information
Committee SP  
Conference Date 2008-03-20 - 2008-03-21 
Place (in Japanese) (See Japanese page) 
Place (in English) Univ. Tokyo 
Topics (in Japanese) (See Japanese page) 
Topics (in English) International Workshop (Mar 20), Speech Production, Speech Perception, Hearing and Speech, etc. (Mar 21) 
Paper Information
Registration To SP 
Conference Code 2008-03-SP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Automatic scoring of language learners' utterances generated through shadowing based on bottom-up clustering 
Sub Title (in English)  
Keyword(1) shadowing  
Keyword(2) bottom-up clustering  
Keyword(3) automatic scoring  
Keyword(4) articulatory effort  
Keyword(5) support technology for teaching  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Naoya Shimomura  
1st Author's Affiliation The University of Tokyo (Univ. of Tokyo)
2nd Author's Name Nobuaki Minematsu  
2nd Author's Affiliation The University of Tokyo (Univ. of Tokyo)
3rd Author's Name Yutaka Yamauchi  
3rd Author's Affiliation Tokyo International University (Tokyo International Univ.)
4th Author's Name Keikichi Hirose  
4th Author's Affiliation The University of Tokyo (Univ. of Tokyo)
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Speaker Author-1 
Date Time 2008-03-21 15:45:00 
Presentation Time 30 minutes 
Registration for SP 
Paper # SP2007-212 
Volume (vol) vol.107 
Number (no) no.551 
Page pp.151-156 
#Pages 6 
Date of Issue 2008-03-13 (SP) 

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