Speed of apparent motion and the wagon-wheel effect Authors
Received: 24 August 1984 Accepted: 25 September 1986 DOI:
Cite this article as: Finlay, D.J. & Dodwell, P.C. Perception & Psychophysics (1987) 41: 29. doi:10.3758/BF03208210 Abstract
The speed of apparent movement of a stroboscopically illuminated spoked wheel was measured by counting the number of spokes passing a particular position per unit of time. This measure gave very stable values of speed, which compared closely to predicted speeds calculated from stimulus onset asynchrony and angular displacement values. The results provide, for the first time, a reliable measure of speed of one form of apparent motion. The traditional explanation for the wagon-wheel effect in terms of beta motion is discussed in light of several differences between the classical demonstrations of apparent motion and stroboscopic motion as seen on the wagon wheel.
This research was undertaken while the first author was on sabbatical leave at Queen’s University. The work was supported by Grant A0044 from the Natural Sciences and Engineering Research Council of Canada to P C. Dodwell and D. W. Murr D. J. Finlay was supported by a special grant from Queen’s University, and P. C. Dodwell by a Killam Research Fellowship.
Download to read the full article text References Attneave, F., & Block, G. (1973). Apparent movement in tridimensional space. Perception & Psychophysics, 13, 301–307. Bartley, S. H. (1941). Vision. New York: Van Nostrand. Caelli, T. M.
Dodwell, P. C.
(1980). On the contours of apparent motion: A new perspective on visual space-time.
CrossRef PubMed Caelli, T. M.
(1979). Frequency, phase, and colour coding in apparent motion.
CrossRef PubMed Clatworthy, J. L.
Frisby, J. P.
(1973). Real and apparent movement. Evidence for a unitary mechanism.
CrossRef Finlay, D.
(1982). Stroboscopic motion in depth.
CrossRef PubMed Finlay, D.
Caelli, T. M.
(1979). Frequency, phase, and colour coding in apparent motion 2.
CrossRef PubMed Finlay, D., Dodwell, P. C.
Caelli, T. M.
(1984). The waggon wheel effect.
CrossRef PubMed Foster, D. H.
(1975). Visual apparent motion and some preferred paths in the rotation group SO(3).
PubMed Green, M., & Von Grunau, M. (1983). Real and apparent motion One mechanism or two? ACM Siggraph/Sigart Newsletter, 17, 17–22. Kaufman, L., Cyrulnik, I., Kaplowitz, J., Melnick, G.
(1971). The complementarity of apparent and real motion.
CrossRef Kolers, P. A. (1972). Aspects of motion perception. New York: Pergamon Press. Neuhaus, W. (1930). Experimentelle Untersuchungen der Scheln bewegung. Archiv für Gesamte Psychologie, 75, 315–458. Rock, I.
(1962). Stroboscopic movement based on change of phenomenal location rather than relative location.
American Journal of Psychology
CrossRef PubMed Ullman, S. (1979). The interpretation of visual motion. Cambridge, MA, MIT Press. Wertheimer, M. (1961). Experimentelle studien uber das sehen von Bewegung. In T. Shipley (Ed.), Classics in psychology (pp 1032–1089). New York Philosophical Library (Reprinted from Zeitschrift für Psychologie, 1912, 61, 161–265). Copyright information
© Psychonomic Society, Inc. 1987