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Paper Abstract and Keywords
Presentation 2026-09-11 10:25
Human reactions triggered by avatars that blink and move their eyes in 1/f fluctuation timing
Sakuya Nakazawa, Yugo Takeuchi (Shizuoka Univ.) HCS2026-48
Abstract (in Japanese) (See Japanese page) 
(in English) In online classes, a mismatch of needs arises between students who prefer to keep their cameras off and teachers who feel a sense of emptiness—akin to "talking to a wall"—when cameras are disabled. Focusing on the potential of "1/f fluctuation" to express both universality and individuality while fostering a sense of humanity and rapport, this study conducted an experiment using an "eyes-only avatar" that incorporated 1/f fluctuation into its gaze movements. The objective was to determine whether such an avatar would be perceived as an attentive listener, thereby alleviating the speaker's sense of emptiness and influencing their feeling of being heard. Comparisons among avatars exhibiting gaze movements based on 1/f fluctuation, fixed timing, and random timing revealed that the 1/f fluctuation condition consistently resulted in the longest speaking durations and highest word counts, whereas the random condition yielded the lowest. However, regarding questionnaire ratings for the "feeling of being heard," "presence of personality or intent," "approachability," and "human-likeness," the fixed-timing condition received the highest scores; meanwhile, the avatar's movement, appearance, and reactions also influenced the results, leading to negative or neutral evaluations. These findings suggest that avatars consisting only of eyes that perform gaze movements accompanied by 1/f fluctuations may unconsciously enhance the speaker's sense of being heard, but may also consciously diminish that sense. Therefore, it seems necessary to either reconsider the appearance of the avatar or shift the application of 1/f fluctuation from merely timing to the quality of the movement itself.
Keyword (in Japanese) (See Japanese page) 
(in English) 1/f fluctuation / gaze behavior / online classes / sense of being listened to / sense of emptiness / sense of presence / human-likeness / affinity  
Reference Info. IEICE Tech. Rep., vol. 126, no. 175, HCS2026-48, pp. 50-55, Sept. 2026.
Paper # HCS2026-48 
Date of Issue 2026-09-03 (HCS) 
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 HCS2026-48

Conference Information
Committee HCS  
Conference Date 2026-09-10 - 2026-09-11 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To HCS 
Conference Code 2026-09-HCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Human reactions triggered by avatars that blink and move their eyes in 1/f fluctuation timing 
Sub Title (in English)  
Keyword(1) 1/f fluctuation  
Keyword(2) gaze behavior  
Keyword(3) online classes  
Keyword(4) sense of being listened to  
Keyword(5) sense of emptiness  
Keyword(6) sense of presence  
Keyword(7) human-likeness  
Keyword(8) affinity  
1st Author's Name Sakuya Nakazawa  
1st Author's Affiliation Shizuoka University (Shizuoka Univ.)
2nd Author's Name Yugo Takeuchi  
2nd Author's Affiliation Shizuoka University (Shizuoka Univ.)
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Speaker Author-1 
Date Time 2026-09-11 10:25:00 
Presentation Time 25 minutes 
Registration for HCS 
Paper # HCS2026-48 
Volume (vol) vol.126 
Number (no) no.175 
Page pp.50-55 
#Pages 6 
Date of Issue 2026-09-03 (HCS) 

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