title: Pulling the other one: 1st- and 2nd-order visual information interact to determine perceived location.
abstract: We demonstrate that the 1st- and 2nd-order characteristics of a visual stimulus can have a profound influence on each other in terms of perceived position. We use the parameter of spatial separation to selectively manipulate the effect of one characteristic upon the other. 1st-order features have their largest effect upon the perceived position of 2nd-order structure when separation is small, whilst the reciprocal effect is maximal at large separations. Implications for models of 1st- and 2nd-order interaction are discussed.
authors.affiliation: Department of Optometry, University of Bradford, Richmond Road, Bradford BD7 1DP, West Yorkshire, UK. d.j.whitaker@bradford.ac.uk
authors.forename: David
authors.initials: D
authors.lastname: Whitaker
authors.forename: Paul V
authors.initials: PV
authors.lastname: McGraw
authors.forename: David R T
authors.initials: DR
authors.lastname: Keeble
authors.forename: Jennifer
authors.initials: J
authors.lastname: Skillen
mesh_terms: D003463:Cues; D006801:Humans; D009903:Optical Illusions; D011594:Psychometrics; D011601:Psychophysics; D014796:Visual Perception / Q000502:physiology*