EEG spatial multivariate pattern analysis reveals distinct switch-related vs. task-related preparation in cue-target interval.
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1
University of Newcastle, Australia
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2
University of Amsterdam, Netherlands
We have previously shown that cues which indicate a shift away from the task completed on the preceding trial elicit an early cue-locked switch positivity that is not evident for cues signaling a possible or definite task-repeat. Additionally, cues that identify the upcoming task (e.g., switch to task A or repeat task A) elicit a smaller pre-target negativity than cues that do not (Karayanidis et al., 2009). In this study, we applied EEG spatial multivariate pattern analysis to these data to confirm distinct spatiotemporal EEG patterns for switch-related (switch positivity) and task-related (pre-target negativity) preparation processes. The training pattern was the local spatial weighting system from the difference in the mean-subtracted set of weights for switch-to (ST: switch to task B) vs. non-informative cues (NI: may repeat A or switch to B). We examined whether this (ST-NI) pattern distinguished between repeat (R: will repeat A) vs. NI and switch-away (SA: will switch to B or C) vs. NI contrasts. From 250-500ms post-cue, the training pattern better predicted SA than R contrasts in alpha and theta bands over parietal regions. In contrast, from 700-900ms post-cue, the training pattern better predicted R than SA contrasts in the alpha band over central areas. These findings are consistent with early switch positivity reflecting switch-related and pre-target negativity reflecting task-related preparation.
Keywords:
cognitive control,
EEG
Conference:
XI International Conference on Cognitive Neuroscience (ICON XI), Palma, Mallorca, Spain, 25 Sep - 29 Sep, 2011.
Presentation Type:
Poster Presentation
Topic:
Poster Sessions: Performance Monitoring and Cognitive Control
Citation:
Karayanidis
F,
Mansfield
E and
Cohen
MX
(2011). EEG spatial multivariate pattern analysis reveals distinct switch-related vs. task-related preparation in cue-target interval..
Conference Abstract:
XI International Conference on Cognitive Neuroscience (ICON XI).
doi: 10.3389/conf.fnhum.2011.207.00248
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Received:
21 Nov 2011;
Published Online:
28 Nov 2011.
*
Correspondence:
Prof. Frini Karayanidis, University of Newcastle, Newcastle, Australia, frini.karayanidis@newcastle.edu.au