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Switch-specific and general preparation map onto different ERP components in a task-switching paradigm.
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- Author(s): Karayanidis, Frini (AUTHOR); Provost, Alexander (AUTHOR); Brown, Scott (AUTHOR); Paton, Bryan (AUTHOR); Heathcote, Andrew (AUTHOR)
- Source:
Psychophysiology. Apr2011, Vol. 48 Issue 4, p559-568. 10p. 3 Graphs. - Source:
- Additional Information
- Subject Terms:
- Abstract: 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. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Psychophysiology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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