Colour and luminance selectivity of spatial and temporal interactions in orientation perception

• Published in: Vision research (Oxford) Vol. 43; no. 27; pp. 2885 - 2893
• Main Authors: Clifford, Colin W.G., Pearson, Joel, Forte, Jason D., Spehar, Branka
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.12.2003; Elsevier Science
• Subjects: Adaptation; Biological and medical sciences; Color Perception - physiology; Contrast Sensitivity - physiology; Fundamental and applied biological sciences. Psychology; Human psychophysics; Humans; Optical Illusions - physiology; Orientation; Perception; Psychology. Psychoanalysis. Psychiatry; Psychology. Psychophysiology; Sensory coding; Sensory Thresholds - physiology; Tilt aftereffect; Tilt illusion; Vision; Visual cortex; Visual Cortex - physiology; Human psychophysics; Visual cortex; Tilt aftereffect; Tilt illusion; Sensory coding; Adaptation; After effect; Human; Central nervous system; Color; Spatial orientation; Experimental study; Encephalon; Luminance; Visual stimulus; Visual pathway; Coding; Vision; Perception; Tilt
• ISSN: 0042-6989; 1878-5646
• DOI: 10.1016/j.visres.2003.08.005

Previous studies have commented upon the similar phenomenology of simultaneous and successive interactions in the perception of orientation. These similarities have been taken as evidence of common mechanisms underlying the simultaneous tilt illusion (TI) and the successive tilt aftereffect (TAE). We measured the TI and TAE for four subjects for combinations of test and inducing stimuli modulated along either the same or orthogonal axes of colour space within the L+ M+ S, L– M colour–luminance plane. The largest TI and TAE were found when test and inducer were modulated along the same axis of colour space. The TI consistently showed greater selectivity for colour/luminance than the TAE. The results are discussed in relation to the known chromatic properties of the primate visual pathways. Specifically, we suggest that both the TI and TAE involve colour- and luminance-specific neurons in primary visual cortex as well as cue-invariant mechanisms in extrastriate cortex.