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  • Title: Trial-to-trial modulations of the Simon effect in conditions of attentional limitations: Evidence from dual tasks.
    Author: Fischer R, Plessow F, Kunde W, Kiesel A.
    Journal: J Exp Psychol Hum Percept Perform; 2010 Dec; 36(6):1576-94. PubMed ID: 20718574.
    Abstract:
    Interference effects are reduced after trials including response conflict. This sequential modulation has often been attributed to a top-down mediated adaptive control mechanism and/or to feature repetition mechanisms. In the present study we tested whether mechanisms responsible for such sequential modulations are subject to attentional limitations under dual-task situations. Participants performed a Simon task in mixed single- and dual-task contexts (Experiment 1), in blocked contexts with dual-task load either, in trialN (Experiment 2a), in trialN-1 (Experiment 2b), or in both trials (Experiment 3). Results showed that the occurrence of a sequential modulation did not depend on dual-task load per se as it occurred predominantly in conditions of lowest and highest task load. Instead, task factors such as the repetition of task episodes and stimulus-response repetitions determined whether a sequential modulation occurred.
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