This study concerns experimental investigation of the effect of instructions on the apparent reversal of rotary motion in depth. It was found that subjects instructed to report apparent reversals of an elliptical shape signalled more reversals than subjects who were instructed to report the non-occurrence of reversals. This difference increased over four trials. When the stimulus object was a trapezium window instructions to report reversals led to a higher rate of reversals than did instructions to report non-occurrence, but this difference did not increase significantly over trials.
Get full access to this article
View all access options for this article.
References
1.
CapponeM. K. (1963). The effects of verbal suggestion on the reversal rate of the Ames trapezoidal illusionFordham University Unpublished Master's dissertation.
2.
DayR. H.PowerR. P. (1963). Frequency of apparent reversal of rotary motion in depth as a function of shape and pattern. Aust. J. Psychol.15, 162–74.
3.
DayR. H.PowerR. P. (1965). Apparent reversal (oscillation) of rotary motion in depth: an investigation and a general theory. Psychol, Rev. (in press).
4.
GrahamC. H. (1963). On some aspects of real and apparent movement. J. opt. Soc. Amer.53, 1019–25.
5.
McGeeJ. M. (1963). The effect of group verbal suggestion and age on the perception of the Ames trapezoidal illusion. J. Psychol.56, 447–53.
6.
MulhollandT. (1963). Instructional sets and motion perceived while viewing rotating stimulus objects. J. Psychol.56, 233–7.
7.
PowerR. P. (1964). Apparent reversal of rotary motion in depthUniversity of Sydney Unpublished Master's thesis.
8.
SherifM. (1936). The Psychology of Social Norms.New York.
9.
WinerB. J. (1962). Statistical Principles in Experimental Design.New York.
