The aim of this paper is to describe the rationale and evaluation of the Black Intelligence Scale of Cultural Homogeneity (BITCH). A "culture specific" test is used to determine the taker's ability to function symbolically or to think in terms of his own culture and environment. A combination of dialect specific and culture specific tests would certainly enhance the possibility of measuring what is inside the black child's head; this is the basic rationale for the BITCH-100. Over two years, a 100-item test was developed. The purpose of the first experiment was to demonstrate that the test would discriminate black from white takers. One hundred white and 100 black high school students ranging in age from 16 to 18 years, half from low socioeconomic levels and half from middle income levels, from the city of St. Louis took the BITCH-100. The black group showed a clear superiority over the white group. The distribution of scores approximated a normal distribution in which blacks comprise the upper half, whites the lower half. Twenty-eight black Neighborhood Youth Corps high school "drop outs" were administered the BITCH and the California Achievement Test in the second experiment. The results confirm the hypothesis regarding the sensitivity of the BITCH in picking up "intellectual indicators" not commonly found in conventional tests. (Author/JM)