title: The vertical-horizontal illusion: assessing the contributions of anisotropy, abutting, and crossing to the misperception of simple line stimuli.
abstract: Mamassian and de Montalembert (2010) have proposed a simple model of the vertical-horizontal illusion. This model identified two components, an anisotropy which results in horizontal lines being perceived approximately 6% shorter than verticals and a bisection component which results in a bisected line being perceived approximately 16% shorter. We have shown that this bisection component confounds two effects: One when lines cross one another and a second effect when one line abuts another. We propose an extension to the Mamassian-de Montalembert model in which their bisection component is replaced by separate crossing and abutting components.
authors.affiliation: Department of Translational Research on New Technologies in Medicine and Surgery, University of Pisa, Italy. kyriaki.mikellidou@for.unipi.it
authors.forename: Kyriaki
authors.initials: K
authors.lastname: Mikellidou
authors.forename: Peter
authors.initials: P
authors.lastname: Thompson
mesh_terms: D000293:Adolescent; D000328:Adult; D016880:Anisotropy; D005260:Female; D006801:Humans; D008297:Male; D008962:Models, Theoretical; D009903:Optical Illusions / Q000502:physiology*; D010468:Perceptual Disorders / Q000523:psychology*; D010775:Photic Stimulation; D011594:Psychometrics; D014796:Visual Perception / Q000502:physiology*; D055815:Young Adult
keywords: abutting; anisotropy; bisection; crossing; illusion; model; vertical-horizontal