Publication

Investigating consciousness with psychophysical and electrophysiological means : Temporal aspects of feature integration

Anne-Sylvie Crisinel
2008
Projet étudiant
Résumé

We presented a series of single lines giving the illusion of a single element moving across the screen. The lines were composed of two vertical segments separated by a small gap. One of the lines was offset, that is the lower segment was not aligned with the upper one. With this manipulation, interestingly, the whole sequence of lines (further referred to as a stream) appeared to be offset in the direction of this line because of motion grouping of the single lines. We varied the position of this offset line (further referred to as the vernier) within the stream, as well as the length of the stream. The task of the observers was to report the offset direction of the stream. Reaction time (RT) did not depend on the position of the vernier, at least for the earlier positions. For example, RT was roughly the same when the first or the third line was offset even though the third line was presented 80 ms after the first one. These results support the hypothesis that a decision cannot be made before the end of a temporal window of about 160 ms from the start of the stimulus. Moreover, there is no access to constituent features of the stream, i.e. the line offset.

À propos de ce résultat
Cette page est générée automatiquement et peut contenir des informations qui ne sont pas correctes, complètes, à jour ou pertinentes par rapport à votre recherche. Il en va de même pour toutes les autres pages de ce site. Veillez à vérifier les informations auprès des sources officielles de l'EPFL.

Graph Chatbot

Chattez avec Graph Search

Posez n’importe quelle question sur les cours, conférences, exercices, recherches, actualités, etc. de l’EPFL ou essayez les exemples de questions ci-dessous.

AVERTISSEMENT : Le chatbot Graph n'est pas programmé pour fournir des réponses explicites ou catégoriques à vos questions. Il transforme plutôt vos questions en demandes API qui sont distribuées aux différents services informatiques officiellement administrés par l'EPFL. Son but est uniquement de collecter et de recommander des références pertinentes à des contenus que vous pouvez explorer pour vous aider à répondre à vos questions.