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Sharing tasks or sharing actions? Evidence from the joint Simon task.

Motonori Yamaguchi1, Helen J Wall2, Bernhard Hommel3

  • 1Department of Psychology, Edge Hill University, Ormskirk, UK. yamagucm@edgehill.ac.uk.

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Summary
This summary is machine-generated.

In joint Simon tasks, individuals share task representations. This study found that one actor

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Area of Science:

  • Cognitive Psychology
  • Social Cognition
  • Human-Computer Interaction

Background:

  • The joint Simon task involves co-acting individuals dividing stimulus-response assignments.
  • Previous research suggests actors may share mental representations of the joint task.
  • The extent of shared task-set aspects between actors remains unclear.

Purpose of the Study:

  • To investigate which specific aspects of a co-actor's task-set are shared in the joint Simon task.
  • To disentangle the effects of trial proportion and compatibility on performance.
  • To propose a novel explanation for the preceding compatibility effect in joint Simon tasks.

Main Methods:

  • Manipulated trial proportions (compatible vs. incompatible) for an 'inducer' actor.
  • Observed the performance of a 'diagnostic' actor with fixed trial proportions.
  • Designed the study to isolate trial proportion effects from preceding trial compatibility.

Main Results:

  • Trial proportions significantly impacted the inducer actor's performance.
  • Trial proportions had minimal influence on the diagnostic actor's performance.
  • Diagnostic actors did not represent inducer's task-set beyond basic stimuli and responses.

Conclusions:

  • Actors in a joint Simon task do not fully share their co-actor's task-set representations.
  • Shared representations are limited to stimulus-response mappings, not higher-level task rules.
  • This finding necessitates a revised understanding of shared cognition in joint tasks.