@article{ref1,
title="Optical specification of time-to-passage: observers' sensitivity to global tau",
journal="Journal of experimental psychology: human perception and performance",
year="1993",
author="Kaiser, M. K. and Mowafy, L.",
volume="19",
number="5",
pages="1028-1040",
abstract="Despite its general mathematical formulation, most empirical work on the visual perception of tau (defined as a quantity divided by its temporal derivative) has focused on the case of direct approach, with tau defined as image angle/rate of expansion. Empirical investigators tend to generalize image size analyses to off-axis approaches. However, this generalization is inappropriate for all but a few classes of objects. After mathematically reestablishing the appropriate optical cues specifying time to passage for noncollision cases, we report a series of studies in which we examined observers' sensitivities to this information in both relative- and absolute-judgment paradigms. In general, we found observers' judgments to be accurate and robust.<p /> <p>Language: en</p>",
language="en",
issn="0096-1523",
doi="",
url="http://dx.doi.org/"
}