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Losing the Boundary: Cognition Biases Action Well After Action Selection

par Buc Calderon, Cristian ;Verguts, Tom;Gevers, Wim
Référence Journal of experimental psychology. General, 144, 4, page (737-743)
Publication Publié, 2015

Article révisé par les pairs

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Résumé :

For selecting an action, traditional theories suggest a cognitive architecture made of serial processingunits. Others suggested that action selection emerges from the parallel implementation of and competitionbetween multiple action plans. To disentangle these 2 hypotheses, we created a reaching task assessingthe temporal dynamics of action selection. Crucially, our design did not force action selection processesto operate in parallel, allowing an informative comparison between the hypotheses. We manipulated theprobability of congruence between a cue and a delayed reach target to investigate, in an unbiased way,whether congruence probability interacts with reach trajectory. Our results show that reach trajectoriesare modulated by the probability of congruence. Hence, action selection is temporally spread, continuesafter movement onset, and emerges from a competition between multiple afforded action plans, inparallel biased by relevant task factors (e.g., probability of reach).