Contrary to popular opinion, it is very difficult to find any objective evidence of culture bias that could account for social class and racial differences in performance on current standard tests of intelligence, even those like the Peabody Picture Vocabulary Test (PPVT), which give the appearance of being highly culture-loaded. They may be culture-loaded, but there is no evidence one has been able to find that the culture-loading differentially affects the performance of Negro and white children. Difference in mean score cannot be a criterion of culture bias. One must seek other evidence. The following types of evidence have been examined in the PPVT, the Lorge-Thorndike Intelligence Test, and Raven's Progressive Matrices, these studies having involved very large samples of Negro and white children in several California school districts: (1) The rank order of item difficulty is virtually the same for Negroes and whites; (2) The matrix of item intercorrelations and the factor structure of these tests is not significantly different for white and Negro samples when these are roughly matched for mental age or total score; (3) In multiple-choice tests, there is no systematic or significant racial difference in the choice of distractors on those items that are answered "wrong"; and, (4) The intelligence tests show essentially the same correlations with scholastic achievement in Negro and white samples. (Author/JM)