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Contact force and scanning velocity during active roughness perception.

Yoshihiro Tanaka1, Wouter M Bergmann Tiest2, Astrid M L Kappers2

  • 1Department of Engineering Physics, Electronics and Mechanics, Graduate School of Engineering, Nagoya Institute of Technology, Nagoya, Japan.

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Summary
This summary is machine-generated.

Humans unconsciously adapt their exploratory movements, like contact force and scanning velocity, based on haptic tasks and stimuli properties. This active perception research reveals distinct strategies for roughness discrimination versus identification.

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Area of Science:

  • Psychology
  • Neuroscience
  • Human-Computer Interaction

Background:

  • Haptic perception and exploratory movements are intrinsically linked, influencing each other.
  • Individuals can consciously or unconsciously modify movements based on perceptual feedback or task demands.

Purpose of the Study:

  • To investigate how active roughness perception is modulated by different haptic tasks.
  • To analyze changes in exploratory movements (normal force, scanning velocity) during perceptual tasks.

Main Methods:

  • A psychophysical experiment was conducted involving active roughness perception.
  • Participants performed discrimination and identification tasks with rough and smooth stimuli.
  • Exerted normal force and scanning velocity were measured.

Main Results:

  • Greater variation in contact force was observed for smooth stimuli compared to rough stimuli.
  • Higher scanning velocities and shorter inter-stimulus intervals were used in the discrimination task versus the identification task.
  • Control tasks revealed lower contact forces and scanning velocities for rough stimuli during passive exploration.

Conclusions:

  • Humans spontaneously adopt distinct exploratory strategies tailored to specific perceptual tasks and stimulus characteristics.
  • These adaptive strategies in haptic exploration appear to optimize performance and may be influenced by factors like stimulus aversiveness.