Discrimination Capabilities of Professionals in Manual Skills in a Haptic Task Not Related to Their Expertise
In this study we present a comparative research between the discrimination capabilities of two populations: Professionals in manual skills and non-professionals, in a task that was not related to their field of expertise. The task was, in a psychophysical test, to discriminate between surfaces of different roughness by indirect touch, using a 3D hapto-visual virtual reality (VR) device. In a texture-difference recognition test subjects glided a pen-like stylus on a virtual surface. The surface was divided into five areas: one central, and four surrounding areas. The roughness of the central area was kept constant throughout the experiment. In each run, three of the four surrounding areas were kept at the same roughness as the central surface, and one, randomly, was different. From run to run, surface roughness was changed following a binary search paradigm. If a subject recognized the portion of the surface with a different roughness, then the roughness was reduced by half; if not, the roughness increased, and so on, until the desired degree of accuracy was achieved. Five professionals from different haptic expertise fields and five non professionals participated in the experiment. The results of the study showed that laymen were significantly more sensitive than experts on roughness discrimination (p < 0.01). These results may suggest that intensive manual activity that demands particular haptic expertise may have a negative impact on manual tasks that are irrelevant to their daily professional activity.
Keywordsexperts performance roughness sensitivity virtual reality
Unable to display preview. Download preview PDF.
- 2.Barret, J., Krueger, H.: Performance effects of reduced proprioceptive feedback on touch typist and casual users in a typing task. Behavior and Information Technology 13(6), 673–681 (1994)Google Scholar
- 6.Connor, C.E., Hsiao, S.S., Phillips, J.R., Johnson, K.O.: Tactile roughness: Neural codes that account for psychophysical magnitude estimates. J. Neuroscience 10, 3823–3836 (1990)Google Scholar
- 10.Lederman, S.J., Klatzky, R.L., Hamilton, C.L., Ramsay, G.L.: Perceiving roughness via a rigid probe: Psychophysical effects of exploration speed and mode of touch. Elec. J. Haptics Res. 1(1), 1–20 (1999)Google Scholar
- 11.Gaggioli, A.: Using virtual reality in experimental psychology. In: Riva, G., Galimberti, C. (eds.) Toward Cyber Psychology: Mind, Cognitions and Society in the Internet Age, pp. 157–174. IOS, Amsterdam (2002)Google Scholar
- 14.Reachin API 3.2 Programmers Guide, pp. 10–11 (2003) Google Scholar
- 15.Hilsenrat, M., Reiner, M.: Hapto-visual virtual reality as a tool in psychophysical research on roughness sensitivity. In: Proceedings of the 3rd International Conference on Advances in Computer-Human Interactions (ACHI 2010), pp. 139–142. IEEE Computer Society Press, Los Alamitos (2010)CrossRefGoogle Scholar