Towards an integrated analysis of bias in cross-cultural assessment

A central methodological aspect of cross-cultural assessment is the interpretability of intergroup differences: Do scores obtained by subjects from different cultural groups have the same psychological meaning? Equivalence (or the absence of bias) is required in making valid cross-cultural comparisons. As cross-cultural comparisons are becoming increasingly popular and important, the problem of bias and its detection is receiving increased attention from researchers. Three kinds of bias are discussed and illustrated, namely construct bias, method bias, and item bias (or differential item functioning). Methods to identify bias are reviewed. An overview is given of common sources of each kind of bias. It is argued that an integrated treatment of all forms of bias is needed to enhance the validity of cross-cultural comparisons. The predominant focus on item bias techniques has the unfortunate implication that construct and method bias are examined insufficiently.