Tresilian (1999) argued that the informativeness of tau as a measure of time to contact is limited because:

Question

Quizplus · Accepted Answer

Tresilian argues that tau is limited in informativeness because it ignores accelerations in object velocity (A), it can only provide information about time to contact with the eyes (B), it is only accurate when applied to objects that are spherically symmetrical (C), and it requires that image size and object expansion are both detectable (D). Therefore, all of the above options are correct.

Tresilian (1999) Argued That the Informativeness of Tau as a Measure