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…

A longstanding and fundamental debate in developmental science is whether knowledge is acquired through domain-specific or domain-general mechanisms. To date, there exists no tool to determine whether experimental data support one theoretical approach or the other. In this article, we argue that the U- and N-shaped curves found in a number of…