Predebon J, 1994, "Convergence responses to monocularly viewed objects: implications for distance perception" Perception 23(3) 303 – 319
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Convergence responses to monocularly viewed objects: implications for distance perception
Received 9 April 1993, in revised form 23 November 1993
Abstract. In four experiments the role of dark vergence and the implied distance from the familiar-size and suggested-size cues to distance on the convergence response was investigated A nonius-alignment technique was used to measure the convergence response in total darkness (dark vergence) and the fusion-free convergence response no monocularly viewed objects presented at a distance of 75 cm under otherwise reduced stimulus conditions. Observers also estimated the size and distance of the objects. The results indicated a significant association between individuals' dank-vergence distances and the convergence distances to the objects Furthermore, the convergence response was influenced by the implied distance from the familiar size cue but not by the implied distance from size suggestions. Both the familiar-size and the suggested-size cues influenced reports of distance. The implications of these findings for distance perception are discussed with particular reference to the familiar-size cue to distance.
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