Michele Fabre-Thorpe

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In speeded categorization tasks, decisions could be based on diagnostic target features or they may need the activation of complete representations of the object. Depending on task requirements, the priming of feature detectors through top-down expectation might lower the threshold of selective units or speed up the rate of information accumulation. In the(More)
Complex visual scenes can be categorized at the superordinate level (e.g., animal/non-animal or vehicle/non-vehicle) without focused attention. However, rapid visual categorization at the basic level (e.g., dog/non-dog or car/non-car) requires additional processing time. Such finer categorization might, thus, require attentional resources. This hypothesis(More)
We tested rapid-categorization in a patient who was impaired in face and object recognition. Photographs of natural scenes were displayed for 100 ms. Participants had to press a key when they saw an animal among various objects as distractors or human faces among animal faces as distractors. Though the patient was impaired at figure/ground segregation,(More)
Many studies have reported rapid detection of visual threats such as the presence of a snake which induces very rapid reactions in both human (adults and children) and non-human primates. According to the "snake detection theory" (Isbell 2006), snakes provided intense selective pressure during the evolution of our visual systems. Although a subcortical(More)
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