Translated tests are being used increasingly for assessing the knowledge and skills of individuals who speak different languages. There is little research exploring why translated items sometimes function differently across languages. If the sources of differential item functioning (DIF) across languages could be predicted, it could have important implications on test development, scoring and equating. This study focuses on two questions: “Is DIF related to item type?”, “What are the causes of DIF?” The data were taken from the Israeli Psychometric Entrance Test in Hebrew (source) and Russian (translated). The results indicated that 34% of the items functioned differentially across languages. The analogy items were the most problematic with 65% showing DIF, mostly in favor of the Russian‐speaking examinees. The sentence completion items were also a problem (45% D1F). The main reasons for DIF were changes in word difficulty, changes in item format, differences in cultural relevance, and changes in content.

Activity in the area of language testing is expanding beyond second language acquisition. In many contexts, tests that measure language skills are being translated into several different languages so that parallel versions exist for use in multilingual contexts. To ensure that translated items are equivalent to their original versions, both statistical and qualitative analyses are necessary. In this article, we describe a statistical method for evaluating the translation equivalence of test items that are scored dichotomously. We provide an illustration of the method to a portion of the verbal subtest of the Psychometric Entrance Test, which is a large-scale postsecondary admissions test used in Israel. By evaluating translated items statistically, language test-developers can ensure the comparability of tests across languages and they can identify the types of problems that should be avoided in future translation efforts.