title: At will or not at will: Electrophysiological correlates of preparation for voluntary and instructed task-switching paradigms.
abstract: The present study investigated whether the advanced reconfiguration processes of the voluntary switching (VTS) paradigm were different from those of the instructed task switching (ITS) paradigm by examining event-related potentials (ERPs) in a within-subjects design. Of importance, given that effector-to-task mapping might lead to differential preparatory strategies, two effector-to-task mapping groups were studied: the hand-to-task (HAND) and finger-to-task (FINGER) groups. Intriguingly, we found the increased posterior negativity for voluntary switch (and/or increased posterior positivity for voluntary repeat) was exclusive to the HAND group, whereas the increased switch-related late posterior positivity in the ITS paradigm was independent of the effector manipulation. Moreover, the lateralized readiness potentials (LRP) and the mu and beta motor-related amplitude asymmetries indicated that the differential switch-related modulations were not the byproduct of hand-specific preparation. The advanced preparatory strategies in the VTS and ITS paradigms are discussed.
authors.affiliation: Department of Psychology, National Chung Cheng University, Chiayi, Taiwan. poyui.chen@gmail.com.
authors.forename: Poyu
authors.initials: P
authors.lastname: Chen
authors.affiliation: Department of Psychology, National Cheng Kung University, No. 1, University Road, Tainan, 701, Taiwan. psyhsl@mail.ncku.edu.tw.
authors.forename: Shulan
authors.initials: S
authors.lastname: Hsieh
mesh_terms: D000293:Adolescent; D000328:Adult; D001288:Attention / Q000502:physiology*; D003118:Color Perception / Q000502:physiology*; D003265:Contingent Negative Variation / Q000502:physiology*; D004292:Dominance, Cerebral / Q000502:physiology; D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D006801:Humans; D007389:Internal-External Control; D008297:Male; D011597:Psychomotor Performance / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology*; D055815:Young Adult
keywords: Cognitive control; ERP; LRP; Strategy; Voluntary task switching