Handicapped Orientation

Since visual discrimination is one of the factors involved in learning from instructional media, the present study was designed (1) tc investigate the effects of hue contrast, illuminant intensity, brightness contrast, and viewing distance on the discriminaticn accuracy of those who see color normally and those who do not, and (2) to investigate the extent to which the discrimination accuracy of color deficients improves, as compared with that of color normals, as a function of brightness contrast. Color deficiencies of two types--deuternopia (green blindness) and protanopia (red blindness)--were represented by six children each in the experiment. With six color normals, they were paid to discriminate the orientation of the gap in chromatic rings presented on chromatic surrounds. The degrees of hue contrast in Part I of the study were 36, 72, 108, 144, and 180 on the Munsell Hue Circle. The illuminan