title: Perception of coherent motion, biological motion and form-from-motion under dim-light conditions.
abstract: Three experiments investigated several aspects of motion perception at high and low luminance levels. Detection of weak coherent motion in random dot cinematograms was unaffected by light level over a range of dot speeds. The ability to judge form from motion was, however, impaired at low light levels, as was the ability to discriminate normal from phase-scrambled biological motion sequences. The difficulty distinguishing differential motions may be explained by increased spatial pooling at low light levels.
authors.affiliation: Department of Psychology, Vanderbilt Vision Research Center, Vanderbilt University, Nashville, TN 37240, USA.
authors.forename: E D
authors.initials: ED
authors.lastname: Grossman
authors.forename: R
authors.initials: R
authors.lastname: Blake
mesh_terms: D005556:Form Perception; D006801:Humans; D008029:Lighting; D009039:Motion Perception / Q000502:physiology*