NDLI: Psychophysical detection of inclusions with the bare finger amidst softness differentials

Content Provider	IEEE Xplore Digital Library
Author	Baumgart, L.A. Gerling, G.J. Bass, E.J.
Copyright Year	2010
Description	Author affiliation: Department of Systems and Information Engineering, University of Virginia, USA (Baumgart, L.A.; Gerling, G.J.; Bass, E.J.)
Abstract	Softness discrimination and the detection of inclusions are important in surgery and other medical tasks. To better understand how the characteristics of an inclusion (size, depth, hardness) and substrate (stiffness) affect their tactile detection and discrimination with the bare finger, we conducted a psychophysics experiment with eighteen participants. The results indicate that within a more pliant substrate (21 kPa), inclusions of 4 mm diameter (20 mm3 volume) and greater were consistently detectable (above 75% of the time) but only at a depth of 5 mm. Inclusions embedded in stiffer substrates (82 kPa) had to be twice that volume (5 mm diameter, 40 mm3 volume) to be detectable at the same rate. To analyze which tactile cues most impact stimulus detectability, we utilized logistic regression and generalized estimating equations. The results indicate that substrate stiffness most contributes to inclusion detectability, while the size, depth, and hardness of the stimulus follow in individual importance, respectively. The results seek to aid in the development of clinical tools and information displays and more accurate virtual haptic environments in discrimination of soft tissue.
Starting Page	17
Ending Page	20
File Size	1965142
Page Count	4
File Format	PDF
ISBN	9781424468218
e-ISBN	9781424468225
e-ISBN	9781424468201
DOI	10.1109/HAPTIC.2010.5444684
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-03-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Psychology Fingers Haptic interfaces Shape Multidimensional systems Computer vision Cybernetics Physics computing Performance analysis Image processing medical simulation Softness discrimination inclusion detection psychophysics tactile perception
Content Type	Text
Resource Type	Article

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