Abstract
Inhibitory tagging (IT), a flexible central control mechanism based on the current task goals, reduces the cognitive conflict effect at the cued location by blocking the incompatible stimulus-response (S-R) code. However, it is unknown whether IT has a similar effect on emotional conflict. Thus, we combined the face-word Stroop task with the manipulation of inhibition of return (IOR) and used event-related potential (ERP) technology to simultaneously examine the modulation effect of IT on emotional and cognitive conflict processing. At the cued location, we found that the two types of conflict effect were significantly reduced and that the conflict processing-related N450 effect was absent. Our data further revealed that IT had similar effects on emotional and cognitive conflict processing. Although a negative difference wave (Nd) was found in the time window of 160 and 220ms, which may reflect the impaired early perceptual processing of the target at the cued location, the effect of Nd was not affected by stimulus congruency. These results illustrate that the cueing effect of conflict processing does not arise from the early stage of perceptual processing, but rather results from the blocked S-R code of the distractors due to IT functioning during the later stage of processing.
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