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Related Experiment Videos

Spatial coding and central patterns: is there something special about the eyes?

Paola Ricciardelli1, Claudia Bonfiglioli, Cristina Iani

  • 1Dipartimento di Psicologia, Università di Milano-Bicocca, Milano, Italy. paola.ricciardelli@unimib.it

Canadian Journal of Experimental Psychology = Revue Canadienne De Psychologie Experimentale
|August 2, 2007
PubMed
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Central stimuli interfere with response selection similarly to lateral stimuli, regardless of stimulus type. This Simon effect, influenced by spatial information, takes longer to process for central patterns.

Area of Science:

  • Cognitive Psychology
  • Human Factors
  • Neuroscience

Background:

  • The Simon effect, a well-documented phenomenon in cognitive psychology, typically arises from spatially conflicting information presented laterally.
  • Investigating the Simon effect with centrally presented stimuli is crucial for understanding spatial attention and response selection mechanisms.

Purpose of the Study:

  • To determine if centrally presented task-irrelevant spatial information elicits a Simon effect comparable to laterally presented stimuli.
  • To examine whether the type of stimulus (squares, arrows, eyes) influences the magnitude of this centrally induced Simon effect.

Main Methods:

  • Participants performed a Simon-like task, responding to stimulus color via lateralized keys.
  • Stimuli, including framed squares, arrows, and schematic eyes, were presented centrally, varying in spatial congruence with response locations.

Related Experiment Videos

Main Results:

  • A significant Simon effect was observed across all stimulus types, indicating interference from task-irrelevant spatial information.
  • Response times were faster when stimulus-defined spatial information corresponded to the required response location.
  • The spatial interference effect increased with response times for central stimuli, suggesting a time-consuming extraction of spatial information.

Conclusions:

  • Centrally presented spatial information, like lateralized stimuli, triggers the Simon effect, impacting response selection.
  • The nature of the stimulus does not alter the occurrence of the Simon effect.
  • Processing spatial information from central patterns requires more time compared to lateralized stimuli.