The effect of two short vertical lines on the apparent length of a horizontal line, which was inserted between those vertical lines, was measured by the magnitude estimation with calibration procedure. The experimental results show: (a) Effects of
f (distance between vertical lines): The inverted U-shaped curve with maximum overestimetion at
e/
f=2/3, was found, where
e indicates the length of the horizontal line. (b)
g (gap between the vertical line and the horizontal line): The inverted U-shaped curve was found, too, when only one vertical line presented. But it's maximum point did not correspond to that in (a). (c)
h (height of vertical lines): As
h increased, the magnitude of overestimation decreased, generally. These results were discussed in relation to some other illusions.
抄録全体を表示