The accuracy of estimating time to contact in transversal motion and head-on motion
The accuracy of estimating time to contact in transversal motion and head-on motion

Authors: Asieh Daneshi, Hamed Azarnoush, Farzad Towhidkhah, Delphine Bernardin, Jocelyn Faubert
Publication date: 2018
Publisher: Cold Spring Harbor Laboratory
Description: The ability to estimate precisely the time to contact (TTC) of the objects is necessary for planning actions in dynamic environments. TTC estimation is involved in many everyday activities with different levels of difficulty. Although tracking a ball that moves at a constant speed and estimating the time it reaches a non-moving target can be fairly simple, tracking a fast moving car with inconsistent speeds and estimating the time it reaches another car is rather difficult. In this study, we asked participants to estimate TTC of an object in transversal and head-on motions. The object became invisible shortly after movement initiation. The results demonstrated that TTC estimation for transversal motion is more accurate than for head-on motion. We present a mathematical model to explain why humans are better in estimating TTC for transversal motion than for head-on motion.
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