Experimental Brain Research

, Volume 208, Issue 1, pp 151–156

Surface texture can bias tactile form perception

Research Note

DOI: 10.1007/s00221-010-2464-3

Cite this article as:
Nakatani, M., Howe, R.D. & Tachi, S. Exp Brain Res (2011) 208: 151. doi:10.1007/s00221-010-2464-3

Abstract

The sense of touch is believed to provide a reliable perception of the object’s properties; however, our tactile perceptions could be illusory at times. A recently reported tactile illusion shows that a raised form can be perceived as indented when it is surrounded by textured areas. This phenomenon suggests that the form perception can be influenced by the surface textures in its adjacent areas. As perception of texture and that of form have been studied independently of each other, the present study examined whether textures, in addition to the geometric edges, contribute to the tactile form perception. We examined the perception of the flat and raised contact surface (3.0 mm width) with various heights (0.1, 0.2, 0.3 mm), which had either textured or non-textured adjacent areas, under the static, passive and active touch conditions. Our results showed that texture decreased the raised perception of the surface with a small height (0.1 mm) and decreased the flat perception of the physically flat surface under the passive and active touch conditions. We discuss a possible mechanism underlying the effect of the textures on the form perception based on previous neurophysiological findings.

Keywords

Tactile perception Tactile illusion Fingerpad Shape perception Geometric form perception 

Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Masashi Nakatani
    • 1
    • 2
  • Robert D. Howe
    • 3
  • Susumu Tachi
    • 4
  1. 1.Graduate School of Information Science and TechnologyThe University of TokyoBunkyoJapan
  2. 2.Tachi Laboratory, Graduate School of Media DesignKeio UniversityKohoku-ku, YokohamaJapan
  3. 3.Harvard School of Engineering and Applied SciencesCambridgeUSA
  4. 4.Graduate School of Media DesignKeio UniversityKohoku-ku, YokohamaJapan

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