Article Dans Une Revue Journal of Experimental Psychology. Human Perception and Performance Année : 2026

Facilitation, interference, or both? Disentangling processes in the stroop, simon, and flanker tasks using neutral conditions and distributional analyses

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Inhibition is crucial to adapt to new situations and resist distraction, making it a central focus of research. Here, we compare three tasks considered as gold standards for measuring inhibition: The Stroop, Simon and Flanker tasks. These tasks involve one relevant and one irrelevant dimension. In congruent trials, both dimensions activate the same response, while they activate opposing ones in incongruent trials. Global interference, the reaction time (RT) difference between these trial-types, confounds both the facilitation and interference effect from the task-irrelevant dimension. To better understand the underlying processes at play within these tasks, we introduced neutral trials. Distributional analyses examined the impact of RT on mere interference (incongruentneutral) and mere facilitation (congruentneutral). Our findings, replicated in Experiment 2, challenge established theories by suggesting that the classic negative-going Simon delta plot reflects a transient and automatic facilitation process, rather than slow-building inhibition. Moreover, we show that the Stroop, Simon and Flanker tasks differ systematically in how mere interference and mere facilitation shape global interference, while also warning against misinterpreting automatic for controlled processes in accounts of conflict resolution.

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hal-05604166 , version 1 (27-04-2026)

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Pablo Croizet, Clément Belletier, Clotilde Jobert, Yasmine Nahed, Ludovic Ferrand. Facilitation, interference, or both? Disentangling processes in the stroop, simon, and flanker tasks using neutral conditions and distributional analyses. Journal of Experimental Psychology. Human Perception and Performance, 2026, 52 (4), pp.486-515. ⟨10.1037/xhp0001409⟩. ⟨hal-05604166⟩
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