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Related Experiment Videos

How sensitive is hand transport to illusory context effects?

M H Fischer1

  • 1Department of Psychology, University of Dundee, Scotland. m.h.fischer@dundee.ac.uk

Experimental Brain Research
|February 24, 2001
PubMed
Summary
This summary is machine-generated.

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Immediate actions use accurate visual-motor information, unaffected by size-contrast illusions (SCI). However, delayed actions, both perceptual and motor, become sensitive to SCI, indicating distinct visual processing for perception and action.

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Human Motor Control

Background:

  • Previous research suggested the distinction between visual processing for perception and action might only affect late visual information during reaching.
  • A recent report indicated hand transport is sensitive to a size-contrast illusion (SCI).

Purpose of the Study:

  • To investigate whether the size-contrast illusion (SCI) affects immediate and memory-based hand transport.
  • To determine if the distinction between visual processing for perception and action extends to hand transport.

Main Methods:

  • Participants performed hand transport tasks under conditions with and without a perceptual size-contrast illusion (SCI).
  • Reaction time, movement time, and movement amplitude were measured for immediate and memory-based responses.

Related Experiment Videos

Main Results:

  • The perceptual SCI did not affect reaction time, movement time, or movement amplitude in immediate responses.
  • Both perception and action demonstrated sensitivity to the SCI when using memory-based responses.

Conclusions:

  • The distinction between visual processing for perception and action extends to hand transport.
  • Immediate actions rely on veridical visuo-motor representations, while delayed actions incorporate distorted perceptual representations.