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Related Experiment Videos

Proprioceptive perception of phase variability.

Andrew D Wilson1, Geoffrey P Bingham, James C Craig

  • 1Indiana University, Department of Psychology, Bloomington, IN 47405-7007, USA.

Journal of Experimental Psychology. Human Perception and Performance
|December 4, 2003
PubMed
Summary
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Perception of movement variability, crucial for limb coordination, is influenced by mean relative phase. Judgments of phase variability showed an inverted U-shape, with 90 degrees perceived as most variable.

Area of Science:

  • Motor Control
  • Human Perception
  • Proprioception

Background:

  • Previous research indicates that perceived phase variability of visual oscillators correlates with mean relative phase.
  • This perception is non-linear, with 90 degrees often judged as more variable than 0 or 180 degrees, irrespective of actual variability.

Purpose of the Study:

  • To investigate if judgments of movement phase variability align with visual perception findings.
  • To explore how mean relative phase and frequency affect the perception of movement variability.
  • To examine the role of online perception in limb movement coupling.

Main Methods:

  • Participants actively tracked a manipulandum, generating finger movements at 0, 90, or 180 degrees mean relative phase.
  • Four levels of actual phase variability were introduced during tracking.

Related Experiment Videos

  • Judgments of perceived phase variability were collected and analyzed in relation to mean relative phase and frequency.

    • Main Results:

    • Perceived movement phase variability exhibited an inverted U-shaped function of mean relative phase.
    • Higher frequencies increased perceived variability at 180 degrees but not 0 degrees.
    • Increased frequency also diminished the ability to discriminate between different levels of phase variability.

    Conclusions:

    • The study supports the hypothesis that online visual and proprioceptive feedback are integral to limb movement coupling.
    • The observed matching between visual, proprioceptive, and movement judgments strengthens the role of perception in motor control.
    • System-specific sensitivities to sensory information likely explain observed differences between visual and movement perception.