umu.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Electrophysiological correlates of subjective visual awareness: an ERP study
Umeå University, Faculty of Social Sciences, Department of Psychology.
2015 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Many event-related potential (ERP) studies have tried to find out which brain processes are responsible for the subjective experience of seeing. The contribution of these studies has been crucial in order to identify the temporal and spatial dynamics of visual awareness. The negative difference wave named visual awareness negativity (VAN), observed around 200 ms after the stimulus onset, has been claimed by many as a plausible candidate for reflecting the processes correlating with conscious visual perception. Other studies argue instead that only the P3 wave, a positive wave observed around 300-400 ms, correlates with visual awareness. The aim of the present study was to shed light on the issue of the presence of VAN even when using an experimental procedure that allows to dissociate the ERP correlate of subjective awareness from those of unconscious perception, allowing a separate analysis. Data from 24 participants was collected in the present study. The experimental framework included a forced-choice localization task of a low-contrast stimulus, followed by the subjective rating of awareness. The results of the study support the idea that the VAN is the earliest electrophysiological correlate of subjective visual awareness and that the phenomenon of visual awareness emerges early in the visual area.

Place, publisher, year, edition, pages
2015. , 27 p.
Keyword [en]
Consciousness, Awareness, Visual perception, EEG, ERP
National Category
Psychology
Identifiers
URN: urn:nbn:se:umu:diva-104606OAI: oai:DiVA.org:umu-104606DiVA: diva2:820355
Subject / course
Allmän språkvetenskap, examensarbete för masterexamen
Educational program
Master's Programme in Cognitive Science
Presentation
2015-06-01, Department of Psychology, conference room, Umeå, Sweden, 01:41 (English)
Supervisors
Available from: 2015-08-12 Created: 2015-06-12 Last updated: 2015-08-12Bibliographically approved

Open Access in DiVA

ELECROPHYSIOLOGICAL CORRELATES OF SUBJECTIVE VISUAL AWARENESS: AN ERP STUDY(1304 kB)211 downloads
File information
File name FULLTEXT01.pdfFile size 1304 kBChecksum SHA-512
ccb8d942ce1228e3acc110f5e544253d50dfdb76caf69075ea74356f53b924c402b2490b6ed3cb87353394b3cd1810bca1c528d35b0ea3a6ec3c301fbaafd3d5
Type fulltextMimetype application/pdf

By organisation
Department of Psychology
Psychology

Search outside of DiVA

GoogleGoogle Scholar
Total: 211 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 490 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf