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Updated: Feb 14, 2026

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Switching between lift and use grasp actions.

Daniel N Bub1, Michael E J Masson1, Hannah van Mook1

  • 1Department of Psychology, University of Victoria, Victoria, British Columbia, Canada.

Cognition
|February 7, 2018
PubMed
Summary

Switching grasp postures for object manipulation incurs performance costs. However, intending to use an object speeds up the preceding lift action, suggesting habitual motor sequences for object function.

Keywords:
ActionsDistal goalObject identification

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Area of Science:

  • Cognitive Psychology
  • Motor Control
  • Human-Computer Interaction

Background:

  • Performing different actions with objects, such as lifting and using, involves distinct motor plans.
  • Switching between these motor plans can lead to performance costs, affecting speed and accuracy.

Purpose of the Study:

  • To investigate the switch costs associated with alternating between lifting and using familiar objects.
  • To determine if the intention to use an object influences the motor control of the preceding lift action.

Main Methods:

  • Participants performed speeded object identification tasks requiring sequential lift and use actions.
  • Switch costs were measured by comparing performance on trials with the same versus different consecutive actions.
  • Reaction times for lift actions were analyzed based on the prospective use of the object.

Main Results:

  • Reliable switch costs were observed when consecutive trials required different actions on the same object.
  • Lift actions were significantly faster when the object was intended for a subsequent use action.
  • This benefit was specific to the lift-then-use sequence, not observed for use actions following a lift-intended object.

Conclusions:

  • The intention to use an object facilitates the preceding lift action, indicating proactive motor control.
  • This facilitation arises from the habitual association of the 'lift-then-use' motor sequence with an object's function.
  • Understanding these motor control mechanisms is crucial for designing intuitive human-object interactions.