The Wechsler tests are the internationally dominating IQ-tests. They are generally regarded as scientific tools that measure universal, culture-independent aspects of the human mind. This claim rest partly on cross-national comparison of test results from culturally and linguistically different populations. The translation, adaptation, and use of the same tests in nations worldwide is therefore an important element in the development of the tests and in establishing and validating the universality of the constructs that the tests measure. This talk presents findings from a historical study of the translation and adaptation of shifting Norwegian versions of the WISC tests (WISC-R, WISC III, WISC IV, AND WISC V). It aims to explore the explicit and implicit methodological and theoretical premises upon which these processes have been based, focusing in particular on the concepts of culture, representativeness, ethnicity, and class that are at play.