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Peer reviewedNamy, Laura L.; Waxman, Sandra R. – Child Development, 1998
Three experiments examined the relation between language acquisition and other symbolic abilities in 18- and 26-month-olds. Found that 18-month-olds spontaneously interpreted gestures, like words, as names for object categories. At 26 months, they spontaneously interpreted words as names and novel gestures as names only when given additional…
Descriptors: Age Differences, Developmental Stages, Infant Behavior, Infants
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
