Abstract：
:This EEG study (N=33) examined event-related potentials associated with conflict between activated responses in the Stroop task, in order to examine the conflict monitoring theory of cognitive control, which predicts the strength of exerted control to be proportional to the detected level of conflict. However, existing research manipulated the sole presence/absence of conflict, but not its exact level. Here, by using a modified color-word task that allowed multiple correct responses for target colors, as well as multiple incorrect responses for distractor words, we manipulated the level of conflict among activated responses (and not only its presence). We expected that a larger number of activated incorrect responses (i.e., a presumably higher conflict) would entail more pronounced conflict-related potentials. Indeed, two components of the N450 wave, parietal negativity and medial frontal negativity, were more negatively deflected when conflict was higher, than when it was lower, visibly responding to the level of conflict. Slow potential weakly responded to the sheer presence of conflict, but not to its level. These results can be plausibly explained by the conflict monitoring theory with a modified conflict evaluation formula, whereas they are at odds with several alternative theories of cognitive control.
journal_name
Brain Resjournal_title
Brain researchauthors
Chuderski A,Senderecka M,Kałamała P,Kroczek B,Ociepka Mdoi
10.1016/j.brainres.2016.08.041subject
Has Abstractpub_date
2016-11-01 00:00:00pages
93-102eissn
0006-8993issn
1872-6240pii
S0006-8993(16)30601-1journal_volume
1650pub_type
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