An illusion of 3-D motion with the Ternus display

Michael D. Dodd, Tara McAuley, Jay Pratt

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


We attempted to eliminate the percept of element motion in the Ternus display by connecting the display elements so that they appeared to be a single object. On each trial, the display elements (two discs) appeared either separated or connected (either via a white line or side by side) and subjects reported whether they observed element motion or group motion at various ISIs. Although it was hypothesized that element motion would be eliminated in the connected condition, subjects observed element motion at short ISIs in the form of a three dimensional illusion in which one element appeared to rotate out in front of (or behind) the other. Implications for short range and long range motion processes are discussed.

Original languageEnglish (US)
Pages (from-to)969-973
Number of pages5
JournalVision research
Issue number8
StatePublished - Apr 2005
Externally publishedYes


  • 3-D motion
  • Apparent motion
  • Ternus display
  • Visual illusion

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems


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