The time course of the asymmetrical "local" switch cost: evidence from event-related potentials |
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Authors: | Martin Clara D Barcelo Francisco Hernandez Mireia Costa Albert |
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Affiliation: | a Departament de Tecnologies de la Informació i les Comunicacions, Universitat Pompeu Fabra, Barcelona, Spain b Clinical Neuropsychology Research Group, Universitat de les Illes Balears, Palma de Mallorca, Spain c Center for Mind/Brain Sciences (CIMeC), University of Trento, Trento, Italy d Departament de Psicologia Bàsica, Universitat de Barcelona, Barcelona, Spain e Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain |
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Abstract: | The goal of the study was to explore the time-course of the asymmetrical “local” switch cost observed in task switching. We investigated event-related potentials induced by cue and target processing when participants were engaged in a card-sorting switching task. Participants were instructed to match each card (target) following one of two possible task rules, the color or the form. The correct task rule changed unpredictably after a variable number of trials, and was signalled by cues indicating to switch or repeat the previous task rule. We observed that transition type (switch versus repeat) and task rule (color versus form) influenced both cue and target processing. Interestingly, the interaction between transition type and task rule, indicating an asymmetry in the local switch cost, affected the brain responses during target processing but not during cue processing. These results suggest that the asymmetry in the local switch cost relates to task execution processes. |
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Keywords: | Frontal N1 Attentional capture Task difficulty Task execution Task preparation |
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