Flicker flutter: Is an illusory event as good as the real thing?

Tracey D. Berger, Marialuisa Martelli, Denis G. Pelli

Research output: Contribution to journalArticlepeer-review


Verghese and Stone (1995) showed that reducing the perceived number of objects by grouping also reduces objective performance. Shams, Kamitani, and Shimojo (2000) showed that a single flash accompanied by multiple beeps appears to flash more than once. We show that objective orientation-discrimination performance depends solely on the perceived number of flashes, independent of the actual number of beeps and flashes. Thus the unit of perceptual analysis seems to be a perceived event, independent of how it is induced.

Original languageEnglish (US)
Pages (from-to)406-412
Number of pages7
JournalJournal of vision
Issue number6
StatePublished - Jul 17 2003


  • Audition
  • Auditory driving
  • Cross modal interaction
  • Event perception
  • Illusion
  • Object recognition
  • Vision

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems


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