A Vygotskian approach to assessment is proposed by invoking the distinction between the development of lower and higher psychological functions. Higher psychological functions are specifically human and develop with the use of cultural tools via mediation. Accordingly, a distinction is made between tests that are based on association, which have…

This article reports the results of a study of potential sources of item nonequivalence between English and Chinese language versions of a cognitive development test for preschool-aged children. Items were flagged for potential nonequivalence through statistical and judgment-based procedures, and the relationship between flag status and item…