title: Attractive Contours of the Ebbinghaus Illusion.
abstract: There is debate as to whether or not the Ebbinghaus illusion is driven by high-level cognitive size contrast mechanisms as opposed to low-level biphasic contour interactions. In this study, we examine the variability in effects that are shared between this illusion and a different illusion that cannot be explained logically by a size contrast account. This comparison revealed that nearly one quarter of the variability for one illusion is shared with the other - demonstrating how a size-contrast account cannot be the sole explanation for the Ebbinghaus illusion.
authors.affiliation: School of Psychology and Public Health, La Trobe University, Victoria, Australia.
authors.forename: Joshua A
authors.initials: JA
authors.lastname: Sherman
authors.affiliation: School of Psychology and Public Health, La Trobe University, Victoria, Australia p.chouinard@latrobe.edu.au.
authors.forename: Philippe A
authors.initials: PA
authors.lastname: Chouinard
mesh_terms: D000293:Adolescent; D000328:Adult; D005556:Form Perception / Q000502:physiology*; D006801:Humans; D008875:Middle Aged; D009903:Optical Illusions / Q000502:physiology*; D012858:Size Perception / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*; D055815:Young Adult
keywords: Ebbinghaus illusion; biphasic contour interaction theory; size perception