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Human gaze behaviour during action execution and observation.

Benno Gesierich1, Angela Bruzzo, Giovanni Ottoboni

  • 1Center for Mind/Brain Sciences, University of Trento, Corso Bettini, Rovereto, Italy. benno.gesierich@unitn.it

Acta Psychologica
|May 1, 2008
PubMed
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Anticipatory gaze behavior is key during action execution. During action observation, gaze strategies vary, suggesting context, not just circuitry, influences eye movements.

Area of Science:

  • Cognitive Neuroscience
  • Human Motor Control
  • Visual Perception

Background:

  • Gaze shifts and fixations are integral to both performing and observing actions.
  • Understanding anticipatory gaze behavior provides insights into cognitive processes underlying action.
  • Previous research suggests proactive gaze plays a role in action execution and observation.

Purpose of the Study:

  • To investigate the dependency of anticipatory gaze behavior in a block stacking task.
  • To examine how effector visibility, actor visibility, and actor type influence gaze patterns.
  • To differentiate gaze strategies during action execution versus action observation.

Main Methods:

  • A block stacking task was employed, with movements controlled via computer mouse.

Related Experiment Videos

  • Participants either executed the task, observed an experimenter, or observed a computer simulation.
  • Eye movements were meticulously measured to analyze gaze shifts and fixations.

    • Main Results:

    • Anticipatory eye movements were significantly more prevalent during self-executed actions.
    • During action observation, gaze behavior showed no dependency on effector/actor visibility or actor type.
    • High inter-subject variability in action observation suggested distinct strategies: block tracking vs. anticipation.

    Conclusions:

    • Anticipatory gaze behavior is strongly context-dependent, particularly during action observation.
    • Neural circuitry may not rigidly predetermine gaze during observation; context is crucial.
    • Understanding the causal mechanism and ownership of an action might be prerequisites for anticipatory gaze.