Visual awareness of low-contrast stimuli is reflected in event-related brain potentials

Ville Ojanen*, Antti Revonsuo, Mikko Sams

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

41 Citations (Scopus)

Abstract

Visual awareness was studied in 11 subjects by using coherent and scrambled objects as stimuli. The stimuli were presented near the subjective perceptual threshold. Explicitly recognized stimuli elicited a specific negative ERP deflection peaking at 460 ms. Our reaction time experiment suggests that this visual awareness negativity (VAN) is similar to that found previously at a shorter latency. We propose that VAN might reflect the exact moment of becoming aware of the task-relevant stimulus properties and provide an online marker of the temporal dynamics of visual awareness.

Original languageEnglish
Pages (from-to)192-197
Number of pages6
JournalPsychophysiology
Volume40
Issue number2
DOIs
Publication statusPublished - Mar 2003
MoE publication typeA1 Journal article-refereed

Keywords

  • ERP
  • Explicit processing
  • Neural correlates of visual awareness
  • Perceptual threshold
  • Processing speed

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