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Related Experiment Video

Updated: May 11, 2026

Efficiently Recording the Eye-Hand Coordination to Incoordination Spectrum
07:30

Efficiently Recording the Eye-Hand Coordination to Incoordination Spectrum

Published on: March 21, 2019

Pointing hand stimuli induce spatial compatibility effects and effector priming.

Akio Nishimura1, Chikashi Michimata

  • 1Department of Psychology, Laboratory of Cognitive Psychology, Sophia University Tokyo, Japan ; Japan Society for the Promotion of Science Tokyo, Japan.

Frontiers in Psychology
|May 3, 2013
PubMed
Summary

Observing another person's hand pointing influences your own actions. Both the direction and the specific hand used (left or right) automatically affect response speed and accuracy.

Keywords:
effector priminghierarchical codinginter-individual interactionperception and actionpointingspatial compatibility

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Area of Science:

  • Cognitive Psychology
  • Action Perception
  • Motor Control

Background:

  • Observing actions can automatically influence one's own motor behavior.
  • Spatial compatibility and effector priming are key mechanisms in action observation research.

Purpose of the Study:

  • To investigate the automatic influence of perceived hand actions on an individual's task performance.
  • To examine the roles of spatial compatibility and effector priming in response to observed actions.

Main Methods:

  • Participants performed a button-pressing task based on target color.
  • Stimuli included left or right hand images pointing in specific directions.
  • Experiments varied stimulus presentation duration to differentiate effects.

Main Results:

  • Brief stimuli showed a spatial compatibility effect, faster responses when pointing direction matched response location.
  • Longer stimuli revealed an additional effector priming effect, faster responses when the observed and responding hands were anatomically congruent (e.g., left-to-left).
  • The spatial compatibility effect was stronger for index finger stimuli than little finger stimuli.

Conclusions:

  • Both spatial/symbolic and anatomical features of observed actions influence own actions with sufficient processing time.
  • Hierarchical coding models may not fully explain action influence when both spatial and anatomical information are present.