title: Illusory, motion, and luminance-defined contours interact in the human visual system.
abstract: Psychophysical studies of interactions between contours defined by different image attributes report that luminance-defined and illusory contours show little if any interaction. Because the contours defined by these attributes may vary in perceptual saliency, we employed the tilt aftereffect (TAE) and a cross-adaptation procedure to evaluate interaction effects between luminance-defined and illusory contours under varying saliency conditions as well as to explore the interaction between illusory and motion-defined contours. When contour salience of the adaptation or test stimuli was modified by the addition of various amounts of static noise, we observed a TAE for all combinations of contour types including the novel motion-illusory and illusory-motion pairs. The interactions demonstrated between the contour classes in this as well as other studies suggests contour invariance in the orientation domain.
authors.affiliation: Laboratorium voor Neuro-en Psychophysiologie, Katholieke Universiteit, Leuven, Belgium.
authors.forename: M A
authors.initials: MA
authors.lastname: Berkley
authors.forename: B
authors.initials: B
authors.lastname: Debruyn
authors.forename: G
authors.initials: G
authors.lastname: Orban
mesh_terms: D000221:Adaptation, Ocular; D005366:Figural Aftereffect / Q000502:physiology; D005556:Form Perception / Q000502:physiology*; D006801:Humans; D009039:Motion Perception / Q000502:physiology*; D009903:Optical Illusions / Q000502:physiology*; D011594:Psychometrics; D012399:Rotation