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

Date

2019-10-31

Advisors

Journal Title

Journal ISSN

ISSN

Volume Title

Publisher

Frontiers in Psychology

Type

Article

Peer reviewed

Yes

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.

Description

open access article

Keywords

task conflict, semantic conflict, response conflict, fMRI, selective attention, Stroop task

Citation

Parris, B.A., 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

Rights

Research Institute

Institute for Psychological Science