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Journal of Vision
Fast interceptive actions, such as catching a ball, rely upon accurate and precise information from vision. Recent models rely on flexible combinations of visual angle and its rate of expansion of which the tau parameter is a specific case. When an object approaches an observer, however, its trajectory may introduce bias into tau-like parameters that render these computations unacceptable as the sole source of information for actions. Here we show that observer knowledge of object sizedoi:10.1167/7.13.11 pmid:17997639 fatcat:nyyihggvh5hq3guu62mq7zpwqe