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Related Experiment Video

Updated: Sep 12, 2025

The "Motor" in Implicit Motor Sequence Learning: A Foot-stepping Serial Reaction Time Task
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Pre-Crastination Emerges in a Sequential Joint Action Task.

April Karlinsky1, Matthew Ray2, Timothy N Welsh3

  • 1Department of Kinesiology, College of Natural Sciences, California State University, San Bernardino, California, USA.

Journal of Motor Behavior
|August 8, 2025
PubMed
Summary
This summary is machine-generated.

In joint actions, individuals act as initiators to complete more demanding tasks earlier, a behavior termed pre-crastination. This study shows initiators facilitate partners by doing more work upfront in sequential tasks.

Keywords:
Action anticipationmotor experiencepre-crastinationresponse featuressequential joint action

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Area of Science:

  • Cognitive Psychology
  • Social Psychology
  • Human-Computer Interaction

Background:

  • Sequential joint actions involve an initiator and a finisher, with initiators often planning actions to aid finishers.
  • The principle of pre-crastination suggests individuals tackle demanding tasks early to reduce later cognitive or motor load.

Purpose of the Study:

  • To investigate pre-crastination in sequential joint action tasks.
  • To determine if initiators in a joint task perform more demanding actions earlier.

Main Methods:

  • Participants engaged in a sequential task where an initiator passed a cube to a finisher for insertion into a slot.
  • The initiator could pre-rotate the cube to varying degrees before passing it.

Main Results:

  • Experiment 1: Initiators performed more cube rotations when partnered than individuals working alone.
  • Experiment 2: Initiators adjusted rotation based on visual information of the finisher's task.

Conclusions:

  • Findings support the concept of pre-crastination in sequential joint actions.
  • Co-actors facilitate shared goals by increasing their early effort, demonstrating proactive task management.