It was hypothesized that a moving or stationary observer who samples an ambient optic array specific to egomotion over a flat plain obtains a phenomenal experience of egomotion over that environment and further that the focus of expansion need not be present in the optic array sample for an observer to perceive his heading and egomotion.…

Attempts to settle the question of whether reading units are ever larger than letters and considers the variables expected to influence the size of the reading unit. (Author/RK)

Names of cities were shock associated and then embedded in material presented to the nonattended channel in a dichotic listening and shadowing situation. A test for conditioning followed the dichotic listening task. Comparisons are made with other studies of galvanic skin responses to unattended words. (Editor/RK)

A series of experiments tested a recent suggestion that vertical symmetry of a stimulus display can serve as a visual diagnostic for responding "same" in a letter-matching task. The data of chief interest were same reaction times to vertically symmetric (e.g., AA) and asymmetric (e.g., LL) displays, each composed of two side-by-side uppercase…