title: Individual variability in perceptual switching behaviour is associated with reversal-related EEG modulations.
abstract: OBJECTIVE
  High individual variability is frequently observed in multistable perception, but few ERP studies have considered this factor. The present investigation evaluates the relation between individual perceptual switching and the modulation of reversal-related ERP components.
  
  
  METHODS
  We used a bistable perception paradigm (Kornmeier and Bach, 2004), consisting of briefly flashed grid of nine Necker cubes, interspersed by a blank screen. The subject's task was to compare the previous stimulus with the latter one. The number of reversal perceptions was used as a measure of individual perceptual switching behaviour.
  
  
  RESULTS
  As in previously reported findings, Reversal Negativity (RN, 180-300 ms) and Late Positive Component (LPC, 350-600 ms) were identified in response to reversal perception. In terms of individual differences, higher reversals were associated with reduced negativity of the RN and enhanced positivity of the LPC.
  
  
  CONCLUSIONS
  The timing of the present results supports the hypothesis that individual variability in perceptual reversal is associated with different neural activations at later stage of processing, when the neural representation of ambiguous figure must be internalized to produce an appropriate response/behaviour.
  
  
  CONCLUSIONS
  Multistable perception can reveal crucial mechanisms underlying individual perceptual re-organization when inconsistent or incoherent stimuli come from the environment.
authors.affiliation: Department of Psychology, "La Sapienza" University of Rome, Italy. Electronic address: emanuela.russo@uniroma1.it.
authors.forename: Emanuela
authors.initials: E
authors.lastname: Russo
authors.affiliation: Department of Psychology, "La Sapienza" University of Rome, Italy.
authors.forename: Vilfredo
authors.initials: V
authors.lastname: De Pascalis
mesh_terms: D004569:Electroencephalography / Q000379:methods*; D005074:Evoked Potentials, Visual / Q000502:physiology*; D005260:Female; D005556:Form Perception / Q000502:physiology*; D006801:Humans; D007206:Individuality; D008297:Male; D010775:Photic Stimulation / Q000379:methods*; D011930:Reaction Time / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*; D055815:Young Adult
keywords: Bistable perception; ERPs; Individual differences; Late Positive Component; Necker cube