A dissociation of attention and awareness in phase-sensitive but not phase-insensitive visual channels

Jan W Brascamp, Jeroen Johan Adrien van Boxtel, Tomas H Knapen, Randolph Randolph Blake

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37 Citations (Scopus)


The elements most vivid in our conscious awareness are the ones to which we direct our attention. Scientific study confirms the impression of a close bond between selective attention and visual awareness, yet the nature of this association remains elusive. Using visual afterimages as an index, we investigate neural processing of stimuli as they enter awareness and as they become the object of attention. We find evidence of response enhancement accompanying both attention and awareness, both in the phase-sensitive neural channels characteristic of early processing stages and in the phase-insensitive channels typical of higher cortical areas. The effects of attention and awareness on phaseinsensitive responses are positively correlated, but in the same experiments, we observe no correlation between the effects on phase-sensitive responses. This indicates independent signatures of attention and awareness in early visual areas yet a convergence of their effects at more advanced processing stages
Original languageEnglish
Pages (from-to)2326 - 2344
Number of pages19
JournalJournal of Cognitive Neuroscience
Issue number10
Publication statusPublished - 2010
Externally publishedYes

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