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francaisLavie (1995) a demontre que lors de l�execution d�une tâche attentionnelle, c�est le niveau de charge perceptuelle qui determine s�il est possible ou non d�ignorer un distracteur. Lavie, Ro et Russell (2003) ont rapporte la seule exception connue a la theorie de la charge perceptuelle en demontrant l�impossibilite d�ignorer un visage humain utilise comme distracteur et cela, meme en presence d�une charge perceptuelle importante. La presente etude vise d�abord a repliquer les resultats de Lavie et al. (2003) a l�aide de visages humains differents des leurs. Dans une deuxieme experience, nous avons voulu verifier si l�utilisation d�objets distracteurs autres que des visages, mais correspondant comme ces derniers a des exemplaires uniques (p. ex., Tour Eiffel) permettrait d�identifier une nouvelle classe d�exception a la theorie de Lavie. Nos resultats confirment une fois de plus que le visage humain est la seule exception connue a la theorie de la charge perceptuelle. EnglishIt has been demonstrated by Lavie (1995) that it is the perceptual load involved in an attentional task that determines whether or not an irrelevant distractor can be ignored. Lavie, Ro, and Russel (2003) have reported the only known exception to the perceptual load hypothesis. They found that it is impossible to ignore human faces when used as distractors, even under conditions of high perceptual load. In the first experiment reported here, the objective was to replicate Lavie et al.�s results while using a different set of distractor faces. In a second experiment, we proposed to verify if a new exception to the perceptual load theory could be demonstrated by using categories of distractors comprising unique elements (e.g., Eiffel Tower). Although our results failed to identify a new class of stimuli whose processing would be unaffected by perceptual load, they convincingly demonstrated that face processing belongs to a class apart. |
