title: The hierarchy of task decision and response selection: a task-switching event related potentials study.
abstract: According to "hierarchical" multi-step theories, response selection is preceded by a decision regarding which task rule should be executed. Other theories assume a "flat" single-step architecture in which task information and stimulus information are simultaneously considered. Using task switching, the authors independently manipulated two kinds of conflict: task conflict (with information that potentially triggers the relevant or the competing task rule/identity) and response conflict (with information that potentially triggers the relevant or the competing response code/motor response). Event related potentials indicated that the task conflict effect began before the response conflict effect and carried on in parallel with it. These results are more in line with the hierarchical view.
authors.affiliation: Ben-Gurion University of the Negev, Be'er Sheva, Israel. Electronic address: amibr@bgu.ac.il.
authors.forename: Ami
authors.initials: A
authors.lastname: Braverman
authors.affiliation: Ben-Gurion University of the Negev, Be'er Sheva, Israel.
authors.forename: Andrea
authors.initials: A
authors.lastname: Berger
authors.affiliation: Ben-Gurion University of the Negev, Be'er Sheva, Israel.
authors.forename: Nachshon
authors.initials: N
authors.lastname: Meiran
mesh_terms: D001921:Brain / Q000502:physiology; D002755:Choice Behavior / Q000502:physiology*; D003220:Conflict, Psychological; D003657:Decision Making / Q000502:physiology*; D005071:Evoked Potentials / Q000502:physiology*; D006801:Humans; D013647:Task Performance and Analysis
keywords: ERP; Response conflict; Response selection; Task conflict; Task decision; Task switching