A widely used term that can refer to specific learning or other events that influence the course of development. Even more broadly, it has been taken to mean the contribution to development of the effects of stimulation from all available sources, both external and internal. None of these meanings is particularly satisfactory as they ignore the active construction of experience by the developing organism through the medium, for example, of exploration
See Constructivism, Core concepts, Developmental outcomes, Education, Experience-dependent processes, Exploration, Learning, Nativism, Nature-nurture debate, Non-core concepts, Ontogenetic skills, Plasticity (experiential), Pragmatism