The present article on executive control addresses the issue of the locus of the Stroop effect by examining neurophysiological components marking conflict monitoring, interference suppression, and conflict resolution. Our goal was to provide an overview of a series of determining neurophysiological findings including neural source reconstruction data on distinct executive control processes and sub-processes involved in the Stroop task. Consistently, a fronto-central N2 component is found to reflect conflict monitoring processes, with its main neural generator being the anterior cingulate cortex (ACC). Then, for cognitive control tasks that involve a linguistic component like the Stroop task, the N2 is followed by a centro-posterior N400 and subsequently a late sustained potential (LSP). The N400 is mainly generated by the ACC and the prefrontal cortex (PFC) and is thought to reflect interference suppression, whereas the LSP plausibly reflects conflict resolution processes. The present overview shows that ERP constitute a reliable methodological tool for tracing with precision the time course of different executive processes and sub-processes involved in experimental tasks involving a cognitive conflict. Future research should shed light on the fine-grained mechanisms of control respectively involved in linguistic and non-linguistic tasks.

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Through either morphological or functional approaches, previous research has examined how instructed second language (L2) learners develop control over a challenging area of French: the use of the imparfait. In order to better understand this challenge, this cross‐sectional study utilized both approaches and examined how 94 university Hispanophone learners of French developed control over 5 L2 imperfective functions with 4 verb types in 2 written narratives. Each L2 learner was assigned to 1 of 6 groups depending on the number of imperfective instances in their texts. In order to identify features of learner language, L2 imperfective use was compared to the imperfective found in first language (L1) Spanish (n = 31) and L1 French (n = 47) narratives. The analyses of the 2,176 instances of L2 imperfective use revealed that this form develops in accordance with a trend whereby a decrease is found from the characterization/state combination, to habituality/telics, to progressivity/nonpunctual dynamic verbs, to inchoative characterization/states, and to frequentation/activities. In contrast to the L1 imperfective in Spanish and French, the L2 imperfective showed variability across these combinations. Moreover, in the L2 narratives, learners favored the characterization/state association at the expense of using other imperfective functions with other verb types.