title: Blackness enhancement.
abstract: Since apparent brightness increases as an intermittent luminous source decreases from flicker fusion to approximately 10 cps, the phenomenal blackness induced by an intermittent annulus should also increase as a result of brightness contrast. However, data from 5 observers showed the phenomenal blackness occurring with a 10-cps inducer was greater than that expected on the basis of brightness contrast.
authors.affiliation: Department of Psychology, Appalachian State University, Boone, NC, 28607.
authors.forename: W L
authors.initials: WL
authors.lastname: Brigner
authors.forename: J R
authors.initials: JR
authors.lastname: Deni
mesh_terms: D000328:Adult; D001288:Attention; D004193:Discrimination Learning; D005425:Flicker Fusion; D006801:Humans; D008027:Light; D011601:Psychophysics; D012684:Sensory Thresholds