title: DISTANCE PRECEPTION IN DARKNESS.
abstract: Human subjects viewed round stimuli located equidistantly in the horizontal and vertical planes of vision under conditions where presumed cues to size were present and where they were systematically eliminated. Two experiments revealed a consistent tendency for the horizon object to be judged the closer. Cues introduced reduced the effect.
mesh_terms: D035843:Biomedical Research; D003463:Cues; D003624:Darkness; D003867:Depth Perception; D004215:Distance Perception; D006801:Humans
keywords: CLINICAL RESEARCH; DARKNESS; DEPTH PERCEPTION