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A Change in the Fingertip Contact Area Induces an Illusory Displacement of the Finger

  • Alessandro MoscatelliEmail author
  • Matteo Bianchi
  • Alessandro Serio
  • Omar Al Atassi
  • Simone Fani
  • Alexander Terekhov
  • Vincent Hayward
  • Marc Ernst
  • Antonio Bicchi
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 8619)

Abstract

Imagine you are pushing your finger against a deformable, compliant object. The change in the area of contact can provide an estimate of the relative displacement of the finger, such that the larger is the area of contact, the larger is the displacement. Does the human haptic system use this as a cue for estimating the displacement of the finger with respect to the external object? Here we conducted a psychophysical experiment to test this hypothesis. Participants compared the passive displacement of the index finger between a reference and a comparison stimulus. The compliance of the contacted object changed between the two stimuli, thus producing a different area-displacement relationship. In accordance with the hypothesis, the modulation of the area-displacement relationship produced a bias in the perceived displacement of the finger.

Keywords

Area of contact Proprioception Finger displacement 

Notes

Acknowledgments

This work is supported by the European Research Council under the ERC Advanced Grant no. 291166 SoftHands (A Theory of Soft Synergies for a New Generation of Artificial Hands). This work has received funding from the EU FP7/2007-2013 project no. 601165 WEARHAP (WEARable HAPtics for Humans and Robots) and project no. 248587 THE (The Hand Embodied).

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Alessandro Moscatelli
    • 3
    Email author
  • Matteo Bianchi
    • 1
    • 2
  • Alessandro Serio
    • 1
    • 2
  • Omar Al Atassi
    • 2
  • Simone Fani
    • 2
  • Alexander Terekhov
    • 4
  • Vincent Hayward
    • 4
  • Marc Ernst
    • 3
  • Antonio Bicchi
    • 1
    • 2
  1. 1.Advanced Robotics DepartmentIstituto Italiano di TecnologiaGenovaItaly
  2. 2.Universitá di Pisa, Centro di Ricerca E. PiaggioPisaItaly
  3. 3.Universität Bielefeld, Cognitive Neuroscience and CITECBielefeldGermany
  4. 4.Sorbonne Universités, UPMC Univ Paris 06, UMR 7222, ISIRParisFrance

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