Abstract
Several studies have demonstrated reduced congruency effects after incongruent trials. The conflict monitoring hypothesis (Botvinick, Braver, Barch, Carter, & Cohen, 2001) assumes that this sequential modulation is based on top-down cognitive control and suggests that more control is engaged after the detection of conflict. An alternative account is based on repetition effects of stimulus and response features and can be considered bottom up. This study investigates both modulatory sources. In a Stroop task with two response-stimulus intervals (RSIs), we demonstrate that top-down modulation does not occur with a very short RSI, suggesting that it takes some time before the system can be reconfigured. Bottom-up modulation is observed for both RSIs. This finding demonstrates that two different sources simultaneously reduce congruency effects after incongruent trials.
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W.G. is supported by Grant D.0353.01 from the Flemish Fund for Scientific Research. F.V. is a fellow (Grant 011D06102) of the Special Research Fund at Ghent University.
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Notebaert, W., Gevers, W., Verbruggen, F. et al. Top-down and bottom-up sequential modulations of congruency effects. Psychonomic Bulletin & Review 13, 112–117 (2006). https://doi.org/10.3758/BF03193821
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DOI: https://doi.org/10.3758/BF03193821