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No evidence for shared representations of task sets in joint task switching.

Motonori Yamaguchi1, Helen J Wall2, Bernhard Hommel3

  • 1Department of Psychology, Edge Hill University, St Helens Road, Ormskirk, Lancashire, L39 4QP, UK. yamagucm@edgehill.ac.uk.

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Summary

This study investigated shared task context in joint task switching. Findings suggest actors do not co-represent their partner's task sets during joint performance.

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Area of Science:

  • Cognitive Psychology
  • Social Cognition
  • Human-Computer Interaction

Background:

  • Joint task performance implies shared understanding of task context.
  • Co-representation theory posits actors mentally share task goals and procedures.

Purpose of the Study:

  • To investigate if actors co-represent task sets during joint task switching.
  • To determine if shared task context influences performance in a joint task switching paradigm.

Main Methods:

  • Two experiments examined task switching costs in individual and joint performance.
  • Joint task switching involved two actors sharing two randomly switching tasks.
  • Experiment 2 controlled for individual response set differences.

Main Results:

  • Individual task switching showed costs only after a response (go trials).
  • Joint task switching revealed costs when an actor responded, but not when the co-actor responded.
  • Results ruled out response set differences as an explanation for joint performance patterns.

Conclusions:

  • Evidence for co-representation of task sets in joint task switching was minimal.
  • Actors may not automatically share or update their partner's task context during joint action.