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http://dx.doi.org/10.5805/SFTI.2019.21.1.88

Characteristics of Thickness Sensation Observed through Sensory Evaluation and Psychophysical Method  

Kim, Soyoung (Dept. of Clothing & Textiles, Chungnam National University)
Hong, Kyunghi (Dept. of Clothing & Textiles, Chungnam National University)
Publication Information
Fashion & Textile Research Journal / v.21, no.1, 2019 , pp. 88-95 More about this Journal
Abstract
The purpose of this study was to figure out the various characteristics of the thickness sensation among elements of tactile sensation using psychophysical method. Firstly, panel screening was processed to select sensitive thickness panel using the triangle test. As a result of discriminating the paper thickness difference from 1 to 4 pieces, the female students perceived the thickness difference more sensitively than the male students (p<.05). Secondly, JND (Just Noticeable Difference) was obtained at percentage of stimulus detection rate in order to detect the degree of thickness difference by psychophysical method. It was found that the difference threshold of the entire group was about 0.125mm, with male group being about 0.178mm and female group being about 0.095mm. Thirdly, Weber's law was used to find the minimum discrimination difference between the stimuli. The experiments were conducted by increasing the paper's base thickness from 1.950mm to 1.330mm, and it was found that the difference tendency increased when the size of the basic stimulus increased. At this time, the minimum discrimination difference increased, but the Weber' fraction was not proportional to the magnitude of the stimulus. The significance of this study was that sensory evaluation was applied to research in the fields of clothing science and it seems effective to further screen and train sensitive students as material discrimination experts.
Keywords
thickness sensation; sensory evaluation; psychophysical; Weber's law; difference threshold;
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