title: Effect of the luminance signal on adaptation-based time compression.
abstract: Traditionally, time perception has been considered the product of a central, generic, cognitive mechanism. Recent evidence, however, has shown that high temporal frequency adaptation induces local reductions in the apparent duration of brief intervals suggesting a distributive system with modality-specific sensory components. Here, we examine the effect of the luminance signal on these adaptation-based temporal distortions. Our results show that the luminance signal is crucial to generate duration compression as the effect disappears at isoluminance and that low visibility and task difficulty at isoluminance cannot explain the discrepancy. We also demonstrate that the effects of adaptation on perceived duration are dissociable from those on apparent temporal frequency. These results provide further evidence for the involvement of the magnocellular system in the neural encoding and representation of visual time.
authors.affiliation: Cognitive, Perceptual and Brain Sciences Department, University College London, London, UK. i.ayhan@ucl.ac.uk
authors.forename: Inci
authors.initials: I
authors.lastname: Ayhan
authors.forename: Aurelio
authors.initials: A
authors.lastname: Bruno
authors.forename: Shin'ya
authors.initials: S
authors.lastname: Nishida
authors.forename: Alan
authors.initials: A
authors.lastname: Johnston
mesh_terms: D000222:Adaptation, Physiological / Q000502:physiology*; D000328:Adult; D055253:Color Vision / Q000502:physiology; D015350:Contrast Sensitivity / Q000502:physiology; D004192:Discrimination, Psychological / Q000502:physiology; D005260:Female; D006801:Humans; D008027:Light; D008297:Male; D008959:Models, Neurological; D009949:Orientation / Q000502:physiology; D010469:Perceptual Distortion / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods*; D012684:Sensory Thresholds / Q000502:physiology; D013998:Time Perception / Q000502:physiology*; D014795:Visual Pathways / Q000502:physiology; D014796:Visual Perception / Q000502:physiology