MOTION PERCEPTION - A MODERN VIEW OF WERTHEIMERS 1912 MONOGRAPH

Max Wertheimer's 1912 monograph on apparent motion is a seminal contri bution to the study of visual motion, but its actual contents are not widely known. This article attempts to clarify what the monograph did and did not contribute, emphasizing links between Wertheimer's princip al findings and the results of subsequent investigations of motion per ception, including currently active lines of research. The topics disc ussed include Wertheimer's experimental tests of explanations for appa rent motion; his work with motion phenomena that lie between successio n and optimum motion; his studies of the influence of attention on mot ion; explorations of various forms of hysteresis and motion transparen cy; and Wertheimer's work with a motion-blind patient.