title: Electrophysiological correlates of anticipatory task-switching processes.
abstract: Recent studies show a differential switch-related positivity emerging before a switch trial and reflecting anticipatory task-set reconfiguration processes. In this study, the switch-related positivity was examined in a cued task-switching paradigm. Cue-stimulus and response-stimulus intervals were independently manipulated to dissociate between the effects of anticipatory preparation and passive dissipation of task-set interference. Reaction time switch cost declined with increasing cue-stimulus and response-stimulus intervals, suggesting a contribution from both active preparation and passive interference processes. In cue-related difference waveforms, a switch positivity peaked around 350-400 ms and is interpreted as reflecting differential activation of task-set reconfiguration. In stimulus-related difference waveforms, a switch-related negativity is believed to indicate the role of S-R priming and response interference in task-switching.
authors.affiliation: Discipline of Psychology, School of Behavioural Sciences, University of Newcastle, Callaghan, Australia.
authors.forename: Rebecca
authors.initials: R
authors.lastname: Nicholson
authors.forename: Frini
authors.initials: F
authors.lastname: Karayanidis
authors.forename: Dane
authors.initials: D
authors.lastname: Poboka
authors.forename: Andrew
authors.initials: A
authors.lastname: Heathcote
authors.forename: Patricia T
authors.initials: PT
authors.lastname: Michie
mesh_terms: D000293:Adolescent; D000328:Adult; D001288:Attention / Q000502:physiology*; D002540:Cerebral Cortex / Q000502:physiology; D003265:Contingent Negative Variation / Q000502:physiology*; D004569:Electroencephalography; D005260:Female; D007839:Functional Laterality / Q000502:physiology; D005795:Generalization, Stimulus / Q000502:physiology*; D006801:Humans; D008297:Male; D010364:Pattern Recognition, Visual / Q000502:physiology*; D011597:Psychomotor Performance / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology; D012718:Set, Psychology