Author:

Keywords:

Adaptation, Ocular, Figural Aftereffect, Form Perception, Humans, Motion Perception, Optical Illusions, Psychometrics, Rotation, Science & Technology, Social Sciences, Life Sciences & Biomedicine, Neurosciences, Ophthalmology, Psychology, Neurosciences & Neurology, TILT AFTEREFFECT, ILLUSORY CONTOURS, CONTOUR INVARIANCE, SUBJECTIVE CONTOURS, ORIENTATION DISCRIMINATION, SPATIAL-FREQUENCY, CONTRAST, COLOR, MECHANISMS, 11 Medical and Health Sciences, 17 Psychology and Cognitive Sciences, Experimental Psychology, 3212 Ophthalmology and optometry

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.