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The role of selective attention in visual awareness of stimulus features: Electrophysiological studies
Univ Turku, Ctr Cognit Neurosci, Turku 20014, Finland.
University of Skövde, School of Humanities and Informatics.ORCID iD: 0000-0002-2771-1588
2008 (English)In: Cognitive, Affective, & Behavioral Neuroscience, ISSN 1530-7026, Vol. 8, no 2, 195-210 p.Article in journal (Refereed) Published
Abstract [en]

Attention and awareness are closely related, but the nature of their relationship is unclear. The present study explores the timing and temporal evolution of their interaction with event-related potentials. The participants attended to specific conjunctions of spatial frequency and orientation in masked (unaware) and unmasked (aware) visual stimuli. A correlate of awareness appeared 100-200 msec from stimulus onset similarly to both attended and unattended features. Selection negativity (SN), a correlate of attentional selection, emerged in response to both masked and unmasked stimuli after 200 msec. This double dissociation between correlates of awareness and SN suggests that the electrophysiological processes associated with feature-based attentional selection and visual awareness of features can be dissociated from each other at early stages of processing. In a passive task, requiring no attention to the stimuli, early electrophysiological responses (before 200 msec) related to awareness were attenuated, suggesting that focal attention modulates visual awareness earlier than does selective feature-beased attention.

Place, publisher, year, edition, pages
Psychonomic Society, Inc. , 2008. Vol. 8, no 2, 195-210 p.
National Category
Natural Sciences
Research subject
Natural sciences
Identifiers
URN: urn:nbn:se:his:diva-2475DOI: 10.3758/CABN.8.2.195ISI: 000257221500008PubMedID: 18589509Scopus ID: 2-s2.0-52249122029OAI: oai:DiVA.org:his-2475DiVA: diva2:132620
Available from: 2008-12-22 Created: 2008-12-22 Last updated: 2016-04-28Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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  • modern-language-association-8th-edition
  • vancouver
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More styles
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  • de-DE
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  • nn-NB
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  • Other locale
More languages
Output format
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  • asciidoc
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