- Title
- Multiple sources underlie ERP indices of task-switching
- Creator
- Jamadar, Sharna; Provost, Alexander; Fulham, W. Ross; Michie, Patricia T.; Karayanidis, Frini
- Relation
- 9th Conference of the Australasian Society for Cognitive Science (ASCS 2009). ASCS09: Proceedings of the 9th Conference of the Australasian Society for Cognitive Science (Sydney 30 September - 2 October, 2009) p. 154-161
- Publisher Link
- http://dx.doi.org/10.5096/ASCS200924
- Publisher
- Macquarie Centre for Cognitive Science
- Resource Type
- conference paper
- Date
- 2010
- Description
- Previous investigations of task-switching have reported that cue-related processes are indexed by a differential switch positivity (D-Pos) and that stimulus-related processes are indexed by a differential switch-negativity (D-Neg). The aim of the current study was to use low resolution electromagnetic tomography to localize the sources of D-Pos and D-Neg. Participants switched randomly between simple tasks and showed an increase in reaction time (RT) for switch relative to repeat trials, i.e., an RT switch cost. ERP waveforms showed a D-Pos in the cue-related interval and a D-Neg in the stimulus-related interval. D-Pos was localized to the superior parietal cortex, supporting arguments that D-Pos is associated with activating task rules during anticipatory reconfiguration. D-Neg was localized to the dorsolateral prefrontal cortex, implicating D-Neg in post-stimulus control.
- Subject
- task-switching; event-related potentials; source analysis
- Identifier
- http://hdl.handle.net/1959.13/935320
- Identifier
- uon:12034
- Identifier
- ISBN:9780646529189
- Language
- eng
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