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Subliminal perception refers to the processing of sensory information that occurs below the level of conscious awareness. Researchers study subliminal perception by presenting a stimulus, such as a word or image, very quickly, typically around 50 milliseconds. This rapid presentation is often followed by another stimulus, such as a pattern of dots or lines, which blocks further mental processing of the initial stimulus. As a result, if participants cannot identify the initial stimulus better...
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How action performance affects object perception.

Marcello Costantini1,2, Luca Tommasi3, Corrado Sinigaglia4,5

  • 1Department of Psychological, Health and Territorial Sciences, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy. marcello.costantini@unich.it.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Perception

Background:

  • The relationship between action and perception is complex.
  • While object perception's effect on action is well-studied, the reverse—how action affects perception—is less understood.
  • Investigating the impact of action performance on perceptual judgments of object features like shape and orientation is crucial.

Purpose of the Study:

  • To determine if action performance influences perceptual judgments of object features.
  • To explore the reciprocal relationship between performing an action and perceiving objects.

Main Methods:

  • Participants repeatedly performed a reach-and-grasp action on a handled mug without visual feedback.
  • Following the action, participants judged whether visually presented mugs were handled or not.
  • Perceptual judgments were analyzed to identify any aftereffects.

Main Results:

  • Repeated grasping actions induced a perceptual categorization aftereffect.
  • A significant slowdown was observed in judging a visually presented handled mug after performing the grasping action.
  • This suggests a direct influence of motor action on subsequent visual perception.

Conclusions:

  • Action performance demonstrably impacts perceptual judgments.
  • Engaging in specific actions can alter how we perceive object properties.
  • This highlights the integrated nature of action and perception systems in the brain.