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An fMRI Study of Response and Semantic Conflict in the Stroop Task.

Parris, B., Wadsley, M.G., Hasshim, N., Benattayallah, A., Augustinova, M. and Ferrand, L., 2019. An fMRI Study of Response and Semantic Conflict in the Stroop Task. Frontiers in Psychology, 10, 2426.

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DOI: 10.3389/fpsyg.2019.02426

Abstract

An enduring question in selective attention research is whether we can successfully ignore an irrelevant stimulus and at what point in the stream of processing we are able to select the appropriate source of information. Using methods informed by recent research on the varieties of conflict in the Stroop task the present study provides evidence for specialized functions of regions of the frontoparietal network in processing response and semantic conflict during Stroop task performance. Specifically, we used trial types and orthogonal contrasts thought to better independently measure response and semantic conflict and we presented the trial types in pure blocks to maximize response conflict and therefore better distinguish between the conflict types. Our data indicate that the left inferior PFC plays an important role in the processing of both response and semantic (or stimulus) conflict, whilst regions of the left parietal cortex (BA40) play an accompanying role in response, but not semantic, conflict processing. Moreover, our study reports a role for the right mediodorsal thalamus in processing semantic, but not response, conflict. In none of our comparisons did we observe activity in the anterior cingulate cortex (ACC), a finding we ascribe to the use of blocked trial type presentation and one that has implications for theories of ACC function.

Item Type:Article
ISSN:1664-1078
Uncontrolled Keywords:Stroop ; Stroop 2-1 mapping ; fMRI ; response conflict ; selective attention ; semantic conflict ; task conflict
Group:Faculty of Science & Technology
ID Code:33112
Deposited By: Unnamed user with email symplectic@symplectic
Deposited On:03 Dec 2019 14:04
Last Modified:03 Dec 2019 14:04

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