Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 107, Issue 19, Pages 8883-8888Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.0913292107
Keywords
awareness; continuous flash suppression; Troxler fading; dual-task; visibility
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Funding
- Netherlands Organisation of Scientific Research
- National Science Foundation
- Mathers Foundation
- Gimbel Fund
- Ministry of Education, Science and Technology [R31-2008-000-10008-0]
- Japan Society for the Promotion of Science
- National Research Foundation of Korea [R31-2008-000-10008-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The brain's ability to handle sensory information is influenced by both selective attention and consciousness. There is no consensus on the exact relationship between these two processes and whether they are distinct. So far, no experiment has simultaneously manipulated both. We carried out a full factorial 2 x 2 study of the simultaneous influences of attention and consciousness (as assayed by visibility) on perception, correcting for possible concurrent changes in attention and consciousness. We investigated the duration of afterimages for all four combinations of high versus low attention and visible versus invisible. We show that selective attention and visual consciousness have opposite effects: paying attention to the grating decreases the duration of its afterimage, whereas consciously seeing the grating increases the afterimage duration. These findings provide clear evidence for distinctive influences of selective attention and consciousness on visual perception.
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