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The visual P2 is attenuated for attended objects near the hands.

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  • 1a Department of Psychology , University of Toronto , Toronto , Ontario , Canada.

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Placing hands near observed objects alters vision by enhancing selective attention. This effect, observed via electroencephalographic visual-evoked potentials (VEPs), specifically attenuates the P2 component for attended stimuli near the hands.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Visual Perception

Background:

  • Visual perception is influenced by the proximity of one's own hands.
  • The neural mechanisms behind this phenomenon are not fully understood.

Purpose of the Study:

  • To investigate the neural basis of visual alteration caused by hand proximity.
  • To determine the role of attention in modulating this effect.

Main Methods:

  • Electroencephalography (EEG) was used to measure visual-evoked potentials (VEPs).
  • Participants observed reversing checkerboards with hands near or far from the display.
  • Attention was manipulated by central or peripheral tasks.

Main Results:

  • The P2 component of VEPs was attenuated for stimuli near the hands.
  • This attenuation occurred only when participants attended to the stimulus location.
  • The effect was specific to the attended location, regardless of physical proximity.

Conclusions:

  • Hand proximity enhances selective attention to visual stimuli at attended locations.
  • This attentional enhancement occurs at later stages of perceptual processing.
  • The findings highlight the interplay between body schema and visual attention.