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Joint Simon effect in movement trajectories.

Ekaterina Sangati1, Marc Slors1, Barbara C N Müller2

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Summary
This summary is machine-generated.

Co-representation, the automatic process of representing a partner's task, is less pervasive than assumed. Mouse-tracking reveals individual differences in joint action, challenging the universality of shared representations.

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Area of Science:

  • Cognitive Psychology
  • Social Psychology
  • Human-Computer Interaction

Background:

  • Joint action research often assumes automatic co-representation of a partner's task.
  • Previous studies utilized stimulus-response compatibility tasks with discrete button presses.

Purpose of the Study:

  • To test the robustness of co-representation effects by varying response modality.
  • To investigate joint action using continuous mouse movements instead of discrete button presses.

Main Methods:

  • A mouse-tracking version of the Joint Simon Task was implemented.
  • Movement trajectories were analyzed for curvature in individual and joint conditions.
  • A Go-NoGo variant of the Simon Task was employed to assess response inhibition.

Main Results:

  • Individual Simon Task showed increased movement curvature on incongruent trials.
  • This effect diminished in the Go-NoGo Simon Task.
  • No overall co-representation effect was found in joint mouse-tracking tasks, unlike button-press studies.
  • Significant individual variation in movement strategies was observed.

Conclusions:

  • The pervasiveness of automatic co-representation in joint action is questioned.
  • Mouse-tracking is a valuable methodology for studying joint action dynamics.
  • Individual differences in task strategies are crucial for understanding joint action performance.