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Direct linkKellogg, David; Shin, Ji-young – British Journal of Educational Studies, 2018
Vygotsky measured his 'zone of proximal development' in years. To do this, he needed a scheme of age periods, and a set of tasks that could diagnose the next age period without defining it. In this paper, we compare the age periods in his late lectures with Halliday's categories of logico-semantic expansion as used by three adolescent…
Descriptors: Developmental Stages, Adolescent Development, Problem Solving, Ability
