The assumptions underlying the classfication rule-learning description of concept acquisition are critically examined. An alternative characterization of what it means to have a primacy hypothesis and Gibson's position that knowledge of the world is a product of direct perception are discusssed. (Author/RD)

A review of available research supports the observation that the young child who lives and grows in the midst of dual language opportunities may enjoy benefits of mental flexibility or may suffer burdens of mental confusion. Further research must explore the language-thought relationship, consider the effects of dual language learning on cognitive…