title: Flicker adaptation can be explained by probability summation between ON- and OFF-mechanisms.
abstract: This study considered whether the dynamics of flicker adaptation can be explained in terms of probability summation over time between independent ON- and OFF-processors. Foveal thresholds were measured for flickering probes, and for static ON- and OFF-probes that have durations consistent with the flicker duty cycle. Thresholds were obtained using a probe-flash stimulus onset asynchrony paradigm. The outcome of the experiment suggests that flicker thresholds are lower than the component ON- and OFF-thresholds, and that the flicker response can be predicted by assuming probability summation between the ON- and OFF-mechanisms.
authors.affiliation: Department of Optometry & Vision Sciences, University of Melbourne, Victoria, Australia.
authors.forename: A J
authors.initials: AJ
authors.lastname: Zele
authors.forename: A J
authors.initials: AJ
authors.lastname: Vingrys
mesh_terms: D000221:Adaptation, Ocular / Q000502:physiology*; D005584:Fovea Centralis / Q000502:physiology; D006801:Humans; D008027:Light; D011336:Probability; D012684:Sensory Thresholds / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*