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Related Experiment Videos

Task alternation cost without task alternation: measuring intentionality.

Einat Yehene1, Nachshon Meiran, Nachum Soroker

  • 1Department of Behavioral Sciences and Zlotowski Center for Neuroscience, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel. eyehene@bgumail.bgu.ac.il

Neuropsychologia
|September 20, 2005
PubMed
Summary
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Patient AF showed a dissociation between intention and action after brain damage. Despite performing only one task, her behavior indicated a persistent intention to switch tasks, impacting performance.

Area of Science:

  • Cognitive Neuroscience
  • Neuropsychology

Background:

  • Investigating the neural basis of intention and action control.
  • Examining task switching paradigms and their cognitive mechanisms.

Observation:

  • Patient AF with left-hemisphere damage, including basal ganglia, exhibited behavioral dissociation between intention and action.
  • AF performed only the SIZE task despite instructions to switch, but showed signs of intending to switch, like task alternation cost and response slowing.

Findings:

  • AF demonstrated "task alternation cost" and "task-congruency effect", indicating interference from the unperformed SHAPE task.
  • Her performance pattern aligned with a control group instructed to "Attend color" (but never cued), suggesting a partially activated intention to switch.

Implications:

Related Experiment Videos

  • Suggests that intention can persist even when action is inhibited.
  • Provides insights into the neural mechanisms underlying intentionality and task switching deficits.
  • Highlights the role of the basal ganglia in action selection and goal maintenance.