Showing papers by "Andrew B. Watson published in 1980"

TL;DR: The small amount of summation observed at low spatial and high temporal frequencies is approximately consistent with the action of direction-selective mechanisms, as proposed by Levinson and Sekuler (1975) , provided that probability summation between such mechanisms is taken into account.

TL;DR: The sum of two just detectable sinusoidal gratings is only slightly more detectable than either one alone, provided that their frequencies are at least an octave apart (Sachs et al., 1971).