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Related Experiment Videos

Does perceived size depend on perceived distance? An argument from extended haptic perception

D Barac-Cikoja1, M T Turvey

  • 1University of Connecticut, Storrs.

Perception & Psychophysics
|February 1, 1995
PubMed
Summary

Haptic perception of gap size is determined by probing dynamics, not perceived distance. Experiments show perceived size is linked to a physical invariant (lambda), independent of perceived distance.

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Area of Science:

  • Psychology
  • Haptic Perception
  • Motor Control

Background:

  • Classical size perception theories emphasize perceived distance.
  • Alternative hypotheses suggest haptic size perception relies on physical invariants.

Purpose of the Study:

  • To compare size-distance invariance with a physical invariant hypothesis for haptic gap size perception.
  • To investigate the relationship between haptically perceived gap size and distance.

Main Methods:

  • Experiment 1: Assessed relation between haptic gap size and distance perception.
  • Experiment 2: Manipulated probe's rotational inertia to test independence of size and distance perception.

Main Results:

  • No causal link found between perceived haptic size and distance.

Related Experiment Videos

  • Perceived haptic gap size variance explained by probing dynamics invariant (lambda).
  • Probe inertia affected size and distance perceptions differently, confirming their independence.

    • Conclusions:

    • Haptic size perception is independent of perceived distance.
    • Physical invariants in probing dynamics, not perceived distance, are key to haptic size perception.
    • Findings inform understanding of invariants in both haptic and visual size perception.