NDLI: The ‘chopstick’ illusion: A simply demonstrated tactile illusion

Content Provider	IEEE Xplore Digital Library
Author	Handzic, I. Reed, K.B.
Copyright Year	2014
Description	Author affiliation: Dept. of Mech. Eng., Univ. of South Florida, Tampa, FL, USA (Handzic, I.; Reed, K.B.)
Abstract	This paper introduces and analyzes a simply demonstrated tactile illusion. The tactile illusion described here is named the “chopstick” illusion since it can be easily demonstrated using a pair of wooden chopsticks. This illusion is demonstrated by moving one's fingers up a broken-off wooden chopstick with the fingertips of the thumb and index finger. As two chopsticks are separated, an angled edge is often created at the chopstick head as one tears away a piece of the other. This edge has a gradual constant increase in the surface dimension. A tactile illusion is experienced by moving the midpoints of the fingertips of the thumb and index finger along the flat portion of the chopstick. The observer of the illusion feels as if the thickness of the material at the edge of the chopstick increases in the form of a bump, but in reality does not and the stick is only getting wider. To investigate this illusion, two experiments were conducted: One with commercially available broken-off wooden chopsticks and one with fabricated plastic chopsticks. The first experiment showed that the chopstick illusion was perceived 72% of the time, while the second experiment showed a 63% perception rate. It was also found that the chopstick groove, which initially separates the two chopsticks played a key role in perceiving this tactile illusion.
Sponsorship	IEEE Robot. Autom. Soc.
Starting Page	551
Ending Page	555
File Size	273471
Page Count	5
File Format	PDF
ISBN	9781479931316
ISSN	23247355
DOI	10.1109/HAPTICS.2014.6775515
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-02-23
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Plastics Skin Haptic interfaces Indexes Optical imaging Optical sensors Thumb Chopsticks Haptic Illusion Tactile Illusion Haptic Perception Tactile Perception
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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