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Download full textArner, Robert S. – 1965
Man's phylogenetic development has resulted in a potential for environmental interaction in a symbolic and conceptual manner. There are ontogenetic requirements to develop such potential. The process by which man learns is sequential and involves perceptual-motor-cognitive abilities. There is an optimum respectivity period at each developmental…
Descriptors: Evolution, Guidance, Human Development, Individual Development
Peer reviewedHalford, Graeme S. – International Journal of Behavioral Development, 1978
Proposes that cognitive developmental stages can be accounted for in terms of information processing factors which limit the highest level of cognitive system which children can attain at any given age. Delineates four progressively more complex levels of cognitive mediation of the environment. Two experiments which support the developmental model…
Descriptors: Age Differences, Children, Cognitive Ability, Cognitive Development
