Overcoming residual interference in mental set switching: neural correlates and developmental trajectory.

NeuroImage
Suzanne T Witt, Michael C Stevens

Abstract

Mental set switching is a key facet of executive control measured behaviorally through reaction time or accuracy (i.e., 'switch costs') when shifting among task types. One of several experimentally dissociable influences on switch costs is 'task set inertia', conceptualized as the residual interference conferred when a previous stimulus-response tendency interferes with subsequent stimulus processing on a new task. Task set inertia is thought to represent the passive decay of the previous stimulus-response set from working memory, and its effects decrease with increased interstimulus interval. Closely spaced trials confer high task set inertia, while sparsely spaced trials confer low task set inertia. This functional magnetic resonance imaging (fMRI) study characterized, for the first time, two opposing brain systems engaged to resolve task set inertia: 1) a frontoparietal 'cortical control' network for overcoming high task set inertia interference and 2) a subcortical-motor network more active during trials with low task set inertia. These networks were distinct from brain regions showing general switching effects (i.e., switch>non-switch) and from other previously characterized interference effects. Moreover, there were ongoi...Continue Reading

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Citations

Apr 6, 2013·PloS One·Cecilia U D StenforsLars-Göran Nilsson
Mar 24, 2017·Attention Deficit and Hyperactivity Disorders·Bailey A MunroBenjamin G Kuhar

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