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Gestalt principles provide a framework for understanding how humans perceive objects as unified wholes within their context. These principles are essential in explaining the cognitive processes that make sense of complex visual stimuli by organizing them into coherent groups. One fundamental principle is proximity, which posits that objects located close to each other are perceived as a collective group. For instance, when dots are positioned near one another, the visual system interprets them...

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Related Experiment Video

Updated: May 11, 2026

Virtual Prism Adaptation Therapy: Protocol for Validation in Healthy Adults
06:12

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Prism adaptation in alternately exposed hands.

Gordon M Redding1, Benjamin Wallace

  • 1Illinois State University, Normal, IL, USA, gredding@ilstu.edu.

Attention, Perception & Psychophysics
|May 9, 2013
PubMed
Summary

Proprioceptive realignment transfers from the right to the left hand in right-handers. This intermanual transfer helps maintain spatial alignment between the hands during prism adaptation tasks.

Area of Science:

  • Neuroscience
  • Motor Control
  • Human Factors

Background:

  • Prism adaptation studies investigate how the brain adapts to altered sensory input.
  • Intermanual transfer refers to the phenomenon where learning or adaptation in one limb influences the other.
  • Proprioception, the sense of limb position and movement, is crucial for motor control and spatial awareness.

Purpose of the Study:

  • To assess the intermanual transfer of proprioceptive realignment aftereffects following prism adaptation in right-handed individuals.
  • To investigate how the sequence of hand movements during adaptation and testing influences this transfer.
  • To understand the role of intermanual transfer in maintaining spatial alignment between the hands.

Main Methods:

  • Right-handed participants performed alternate target pointing with both hands over 40 trials (20 per hand).

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  • Prism adaptation was induced, and subsequent realignment aftereffects were measured.
  • The order of hand exposure and testing was systematically varied to examine sequence effects.

    • Main Results:

    • Right-hand adaptation was consistent regardless of exposure or testing order.
    • Left-hand adaptation was significantly greater when the right hand initiated pointing or was tested first.
    • Terminal errors during adaptation showed cyclical variations, converging to zero when the right hand led.

    Conclusions:

    • Proprioceptive realignment transfers from the right to the left hand during both adaptation and post-exposure testing.
    • This transfer facilitates the maintenance of consistent spatial alignment between the two hands.
    • The findings suggest the left hand's spatial map is recalibrated to align with the right hand's established spatial map.