Wl. Brigner et al., A SIZE ILLUSION FROM SIMULTANEOUS CHANGES IN LENGTH AND DIRECTION OF A LINE PATTERN, Perceptual and motor skills, 80(1), 1995, pp. 115-118
A circle was attached to one of three lines which were changing in len
gth and direction simultaneously. This configuration of moving lines h
ad been found previously to induce the perception of depth. Of 26 obse
rvers 20 reported that the moving circle appeared smaller in size than
a physically equal stationary circle which was located outside the ch
anging, depth-inducing configuration.