An Experimental Study on the Size Constancy of Colored Wall at Long Distance in Open Air Field

Abstract

Someone says that a house Iying at a remote distance appears 10cm in size, while the other may say that the same house appears to be 5cm in size, According to the law of the geometrical optics or perspective. the size must be inversely proportienal to the distance of the house from an observer, or must be proportional to visuat angle whose vertex is the observer's eye. According to a psychological law, however, the house appears larger than the geometrically diminished size, sometimes close to the real size. The apparent size varies depending on individuals. Psychologists call the phenomena as`S ize Constnncy". This means that the apparent size or perceptive size remains constantly, to a certain fiegree, at the real size.