Interference in the shared-Stroop task: a comparison of self- and other-monitoring

Martin J. Pickering, Janet F. McLean, Chiara Gambi

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    Abstract

    Co-actors represent and integrate each other's actions, even when they need not monitor one another. However, monitoring is important for successful interactions, particularly those involving language, and monitoring others' utterances probably relies on similar mechanisms as monitoring one's own. We investigated the effect of monitoring on the integration of self- and other-generated utterances in the shared-Stroop task. In a solo version of the Stroop task (with a single participant responding to all stimuli; Experiment 1), participants named the ink colour of mismatching colour words (incongruent stimuli) more slowly than matching colour words (congruent). In the shared-Stroop task, one participant named the ink colour of words in one colour (e.g. red), while ignoring stimuli in the other colour (e.g. green); the other participant either named the other ink colour or did not respond. Crucially, participants either provided feedback about the correctness of their partner's response (Experiment 3) or did not (Experiment 2). Interference was greater when both participants responded than when they did not, but only when their partners provided feedback. We argue that feedback increased interference because monitoring one's partner enhanced representations of the partner's target utterance, which in turn interfered with self-monitoring of the participant's own utterance.
    Original languageEnglish
    Article number220107
    Number of pages11
    JournalRoyal Society Open Science
    Volume9
    Issue number4
    Early online date27 Apr 2022
    DOIs
    Publication statusPublished - 27 Apr 2022

    Keywords

    • Language production
    • Joint action
    • Monitoring
    • Stroop

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