title: Speed discrimination of stereoscopic (cyclopean) motion.
abstract: This study investigated the degree to which speed of stereoscopic translational motion (i.e. moving binocular disparity information) can be discriminated in a display that minimizes position information. Observers viewed dynamic random-element stereograms depicting arrays of randomly positioned stereoscopic dots that moved bidirectionally. Two tasks were performed: a speed discrimination task and a displacement discrimination task. Across a range of conditions, speed could be discriminated under conditions in which displacement could not. Thus, speed of stereoscopic motion can be discriminated when position information is minimal. This result indicates that stereoscopic motion is sensed in a way that cannot be explained by feature tracking or by inferring the motion from memory of position and time.
authors.affiliation: Department of Psychology, Washington State University, Pullman 99164-4820, USA. rpatter@mail.wsu.edu
authors.forename: R
authors.initials: R
authors.lastname: Patterson
authors.forename: M
authors.initials: M
authors.lastname: Donnelly
authors.forename: R E
authors.initials: RE
authors.lastname: Phinney
authors.forename: M
authors.initials: M
authors.lastname: Nawrot
authors.forename: A
authors.initials: A
authors.lastname: Whiting
authors.forename: T
authors.initials: T
authors.lastname: Eyle
mesh_terms: D003867:Depth Perception / Q000502:physiology*; D004056:Differential Threshold; D005260:Female; D006801:Humans; D008297:Male; D009039:Motion Perception / Q000502:physiology*; D010364:Pattern Recognition, Visual / Q000502:physiology; D013997:Time Factors; D015357:Vision Disparity / Q000502:physiology