Various aspects, interpretations and definitions of test bias are reviewed to set past and future research on the topic in proper perspective. Conclusions reached are the following: 1) There is widespread failure to interpret test scores appropriately, especially in making the distinctions between aptitude and achievement tests; 2) Some research, especially that on differential validity and questions of particular content of the test questions, is yielding disappointing results despite its initial promise; 3) Other research—questions of bias in the selection model and in the criterion measures—is leading us to examine our own value systems. 4) Inappropriateness of the tests to a particular population is a real problem that possibly can be addressed through tailored testing of those populations. The report cites many kinds of interpretations and misinterpretations of test scores: confusion of achievement test and aptitude testing; interpretation of mean differences as test bias; overinterpretation of scores, i.e. the belief that the tests measure more than they actually do; sexism in the language of test questions; and quarrels with test content as bias.