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Related Experiment Videos

Automatic spatial coding of perceived gaze direction is revealed by the Simon effect.

Marco Zorzi1, Daniela Mapelli, Elena Rusconi

  • 1University of Padua, Padua, Italy.

Psychonomic Bulletin & Review
|August 19, 2003
PubMed
Summary

Schematic eye drawings automatically trigger spatial coding of gaze direction. This "gaze-direction Simon effect" shows gaze cues are processed automatically and independently of stimulus location.

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Area of Science:

  • Cognitive psychology
  • Neuroscience
  • Visual perception

Background:

  • The Simon task demonstrates how irrelevant spatial information can interfere with task performance.
  • Automatic processing of salient cues is a key area in understanding cognitive mechanisms.

Purpose of the Study:

  • To investigate the automatic processing of gaze cues using the Simon effect.
  • To determine if gaze direction is automatically coded in space.
  • To explore the independence of gaze coding from stimulus spatial coding.

Main Methods:

  • Utilized a Simon task paradigm with schematic eye stimuli.
  • Employed a two-choice discrimination task based on eye color.
  • Manipulated stimulus position and gaze direction orthogonally in one experiment.

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Main Results:

  • A "gaze-direction Simon effect" was observed, indicating automatic spatial coding of gaze.
  • Reaction times were influenced by irrelevant gaze direction.
  • Gaze direction coding was found to be independent of stimulus spatial coding.

Conclusions:

  • Gaze direction is automatically processed and spatially coded.
  • A specialized mechanism likely underlies the coding of gaze direction.
  • These findings contribute to understanding automatic visual cue processing.