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Paper Abstract and Keywords
Presentation 2007-10-11 13:50
Effect of the Workload on Fluctuations in Pupil Diameter
Kiyomi Sakamoto, Shoichi Aoyama, Shigeo Asahara (MEI), Naofumi Murata, Haruki Mizushina, Hirohiko Kaneko (Tokyo Tech) MBE2007-56
Abstract (in Japanese) (See Japanese page) 
(in English) This paper examined the effect of the workload on fluctuations in pupil diameter and psychological state .Pupil diameter (PD) was monitored and recorded by means of infrared video camera, while observers performed the task using auditory stimuli presented at time intervals of 1s, 3s and 5s, for 60 seconds in each trial. After each trial, observers responded their subjective psychological state during the trial. The results showed that subjective responses of “arousal”, “activity”, “time pressure” and “anxiety” increased and that PD fluctuations spectra tended to shift to lower frequency (LF) when time interval of auditory stimuli was shorter. Moreover, significant correlations were observed between the ratio of lower frequency components to higher components (LF/HF) of PD fluctuations and “time pressure” or “anxiety”, and between the peak frequency of PD fluctuations spectra and “time pressure” or “irritation”. However PD mean was significantly correlated only with “arousal”. These results indicate that LF/HF of PD fluctuations and the peak frequency of PD fluctuations spectra will be effective evaluation indices for mental stress.
Keyword (in Japanese) (See Japanese page) 
(in English) Pupil diameter / Auditory stimuli / Psychological state / fluctuations in pupil diameter / / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 248, MBE2007-56, pp. 23-26, Oct. 2007.
Paper # MBE2007-56 
Date of Issue 2007-10-04 (MBE) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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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)
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Conference Information
Committee MBE  
Conference Date 2007-10-11 - 2007-10-11 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To MBE 
Conference Code 2007-10-MBE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Effect of the Workload on Fluctuations in Pupil Diameter 
Sub Title (in English)  
Keyword(1) Pupil diameter  
Keyword(2) Auditory stimuli  
Keyword(3) Psychological state  
Keyword(4) fluctuations in pupil diameter  
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1st Author's Name Kiyomi Sakamoto  
1st Author's Affiliation Matsushita Electric Industrial Co.,Ltd. (MEI)
2nd Author's Name Shoichi Aoyama  
2nd Author's Affiliation Matsushita Electric Industrial Co.,Ltd. (MEI)
3rd Author's Name Shigeo Asahara  
3rd Author's Affiliation Matsushita Electric Industrial Co.,Ltd. (MEI)
4th Author's Name Naofumi Murata  
4th Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
5th Author's Name Haruki Mizushina  
5th Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
6th Author's Name Hirohiko Kaneko  
6th Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
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Speaker Author-1 
Date Time 2007-10-11 13:50:00 
Presentation Time 25 minutes 
Registration for MBE 
Paper # MBE2007-56 
Volume (vol) vol.107 
Number (no) no.248 
Page pp.23-26 
#Pages 4 
Date of Issue 2007-10-04 (MBE) 

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