- Title
- Switch-specific and general preparation map onto different ERP components in a task-switching paradigm
- Creator
- Karayanidis, Frini; Provost, Alexander; Brown, Scott; Paton, Bryan; Heathcote, Andrew
- Relation
- Psychophysiology Vol. 48, Issue 4, p. 559-568
- Publisher Link
- http://dx.doi.org/10.1111/j.1469-8986.2010.01115.x
- Publisher
- WIley-Blackwell Publishing
- Resource Type
- journal article
- Date
- 2011
- Description
- We examined whether the cue-locked centroparietal positivity is associated with switch-specific or general preparation processes. If this positivity (300–400 ms) indexes switch-specific preparation, faster switch trials associated with smaller RT switch cost should have a larger positivity as compared to slower switch trials, but no such association should be evident for repeat trials. We extracted ERP waveforms corresponding to semi-deciles of each participant's RT distribution (i.e., fastest to slowest 5% of trials) for switch and repeat conditions. Consistent with a switch-specific preparation process, centroparietal positivity amplitude was linked to slower RT and larger RT switch cost for switch but not repeat trials. A later pre-target negativity (500–600 ms) was inversely correlated with RT for both switch and repeat trials, consistent with a general anticipatory preparation processes.
- Subject
- advance preparation; task-switching; RT distribution; single trial ERP
- Identifier
- http://hdl.handle.net/1959.13/931278
- Identifier
- uon:11029
- Identifier
- ISSN:1469-8986
- Rights
- The definitive version is available at www.onlinelibrary.wiley.com
- Language
- eng
- Full Text
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