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Paper Abstract and Keywords
Presentation 2012-01-28 14:35
Mental fatigue measurement based on the changes in flicker perception threshold using consumer mobile devices -- Flicker Health Management System --
Sunao Iwaki (AIST), Nobuyoshi Harada (FHM) MBE2011-102
Abstract (in Japanese) (See Japanese page) 
(in English) We have been developing techniques (1) to visualize spatiotemporal brain activities to investigate neural mechanisms underlying the human visual cognitive functions, especially the 3-D object perception from motion, and (2) to evaluate mental fatigue quantitatively by measuring perceptual performance of the visually presented flicker, namely, the flicker-perception threshold (FPT) on consumer devices. In this paper, we describe a method to solve the long-standing problem that the original flicker test inherently has, namely, arbitrariness and subjectivity in the subjects' response during determining FPT. We developed (a) a new method to control a subjective flickering sensation by changing the contrast of the visual stimuli instead of changing temporal frequency, and (b) a new paradigm, in which forced-choice task performance was used to determine FPT to eliminate arbitrariness of the subjects’ response. The proposed techniques were implemented as application softwares, which enables us to measure mental fatigue quantitatively using consumer mobile devices such as smart phones and PCs.
Keyword (in Japanese) (See Japanese page) 
(in English) Flicker perception threshold / Mental fatigue / Personal mobile device / / / / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 423, MBE2011-102, pp. 121-124, Jan. 2012.
Paper # MBE2011-102 
Date of Issue 2012-01-20 (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 2012-01-27 - 2012-01-28 
Place (in Japanese) (See Japanese page) 
Place (in English) Kyushu University 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To MBE 
Conference Code 2012-01-MBE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Mental fatigue measurement based on the changes in flicker perception threshold using consumer mobile devices 
Sub Title (in English) Flicker Health Management System 
Keyword(1) Flicker perception threshold  
Keyword(2) Mental fatigue  
Keyword(3) Personal mobile device  
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1st Author's Name Sunao Iwaki  
1st Author's Affiliation National Institute of Advanced Industrial Science and Technology (AIST)
2nd Author's Name Nobuyoshi Harada  
2nd Author's Affiliation Flicker Health Management Corp (FHM)
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Speaker Author-1 
Date Time 2012-01-28 14:35:00 
Presentation Time 25 minutes 
Registration for MBE 
Paper # MBE2011-102 
Volume (vol) vol.111 
Number (no) no.423 
Page pp.121-124 
#Pages 4 
Date of Issue 2012-01-20 (MBE) 

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