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Related Experiment Videos

Perceiving while acting: action affects perception.

Anna Schubö1, Wolfgang Prinz, Gisa Aschersleben

  • 1Institut für Psychologie, University of Erlangen, Kochstrasse 4, 91054 Erlangen, Germany. anna.schuboe@rzmail.uni-erlangen.de

Psychological Research
|August 5, 2003
PubMed
Summary
This summary is machine-generated.

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Motor responses influence stimulus encoding, causing contrast effects with short intervals and assimilation with long intervals. This suggests shared perception-action domains and competition dynamics.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Motor Control

Background:

  • Motor responses can influence how stimuli are encoded, even when functionally unrelated.
  • Previous research indicated stimulus encoding is affected by concurrent response execution, showing contrast effects.

Purpose of the Study:

  • To elucidate the mechanisms underlying response-stimulus (R-S) effects.
  • To investigate the time course of R-S effects and differentiate between contrast and assimilation.

Main Methods:

  • Two experiments were conducted to study R-S effects.
  • Experiment 1 examined the time course of R-S effects across different intertrial intervals (ITIs).
  • Experiment 2 aimed to rule out motor repetition as an explanation for assimilation effects.

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Main Results:

  • Stimulus encoding showed contrast effects only with short ITIs.
  • With long ITIs, contrast effects shifted to assimilation effects.
  • Assimilation effects were not attributable to motor repetition.

Conclusions:

  • Findings support a shared representational domain for perception and action control.
  • Contrast emerges when stimulus-response (S-R) assignments compete during perception.
  • Assimilation emerges in memory after perceptual competition resolves.