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Behavioural and electrophysiological measures of task switching during single and mixed-task conditions
- Source :
- Biological Psychology. 72:278-290
- Publication Year :
- 2006
- Publisher :
- Elsevier BV, 2006.
-
Abstract
- In order to understand how the brain prepares for and executes a switch in task demand, we measured reaction time (RT), accuracy, and event-related brain potentials associated with performance in single and mixed-task blocks using a cued design. Our results show that trials which repeat in a mixed-task block (repeat trials) were more demanding than trials which repeated in a single-task block, as reflected by the presence of a RT mixing cost and by the presence of a smaller target-locked positivity (P3b) on repeat trials. Within a mixed-task block, repeat and switch trials also differed, where repeat trials showed evidence of greater preparation (larger cue-locked negativity), more efficient target processing (larger target-locked P3b), and shorter RTs. In addition, the cue-locked negativity difference remained despite equating repeat and switch trials on RT, suggesting that this negativity difference is specific to the switching process. Our results are discussed in light of existing models of task switching.
- Subjects :
- Adult
Male
Task switching
medicine.medical_specialty
Audiology
Electroencephalography
Task (project management)
Memory
Event-related potential
P3b
Reaction Time
medicine
Humans
Attention
Cued speech
medicine.diagnostic_test
Working memory
General Neuroscience
Brain
Cognition
Event-Related Potentials, P300
Neuropsychology and Physiological Psychology
Female
Cues
Psychology
Neuroscience
Psychomotor Performance
psychological phenomena and processes
Subjects
Details
- ISSN :
- 03010511
- Volume :
- 72
- Database :
- OpenAIRE
- Journal :
- Biological Psychology
- Accession number :
- edsair.doi.dedup.....276b905931f42e222518854d4b0f0271