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Thinking with portals: revisiting kinematic cues to intention
Roland Pfister1, Markus Janczyk1, Robert Wirth1
1Julius Maximilians University of Würzburg, Germany.
Cognition
|August 27, 2014
Summary
Anticipated action consequences, even those occurring after movement completion, influence how we move. This research shows how environmental changes shape our movement trajectories.
Area of Science:
- Cognitive Neuroscience
- Motor Control
- Human-Computer Interaction
Background:
- Intention significantly impacts motor execution, influencing movement-related and social intentions.
- The effect of intermediate-level intentions, concerning action-contingent environmental changes, on movement trajectories is less understood.
Purpose of the Study:
- To investigate how anticipated consequences of actions, specifically environmental displacements, affect movement trajectories.
- To explore the role of intermediate-level intentions in shaping physical actions.
Main Methods:
- Three experiments were conducted using a virtual reality setup.
- Participants controlled a virtual avatar, steering it towards portals that tele-ported the avatar to a new location.
- Movement trajectories of the avatar were analyzed to identify the influence of anticipated outcomes.
Main Results:
- Hand movements were significantly 'torn' towards the anticipated final location of the avatar, even before the displacement occurred.
- Anticipated action consequences demonstrably influence the planning and execution of movement trajectories.
- This effect persisted even when the environmental consequence (displacement) happened post-movement.
Conclusions:
- Anticipated action consequences leave a measurable imprint on movement trajectories.
- Findings suggest that action planning integrates predicted environmental changes.
- This research helps unify theories on intentions, movement, and action planning frameworks.
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