Mise au point d'un paradigme de perturbation motrice pour l'étude de la perception de la parole (Defining a motor perturbation paradigm for speech perception studies) [in French]

________________________________________________________________________________________________________ Defining a motor perturbation paradigm for speech perception studies To display the role of motor knowledge in speech perception it may be necessary to attempt to modulate access to such knowledge during perception, in double tasks paradigms. But the motor task supposed to modulate perception must not produce itself some auditory perturbation either directly or through auditory imagery due to efference copy mechanisms. We propose and test tasks involving cyclic jaw or lip gestures, which do not produce such auditory images, but however perturbate inner speech production. This is evidenced in a task in which subjects must mentally count while producing such orofacial gestures, leading to a strong slowing of mental counting in respect to manual perturbations used as controls. MOTS-CLES: lien perceptuo-moteur, double tâche, parole intérieure, comptage mental, perturbation