This special issue is devoted to the cultural-historical school of thought about mental development based on the work of Lev Vygotsky. The research of Vygotsky addressed the sociocultural basis of higher-level cognitive functions, and ascribed an influential role to human speech and other mediational tools in originating changes in cognition and…

Two influential theories of intellectual development are reviewed and analyzed: the psychometric framework, based on the factorial composition of intelligence, and the Piagetian model, based on assimilation and accomodation through four stages of intellectual development. A third concept is the componential theory of intelligence, based on…