This paper outlines a proposal to cover four very early stages for the acquisition of negation systems in natural languages. It emphasizes the formal linguistic devices as the major variables that determine the various language-specific developmental sequences. (CHK)

Presents an outline for a theory of syntax acquisition, surveys other approaches to language acquisition, and addresses the following methodological issues: (1) the relevance of linguistic theory to the model; (2) how the model is tested; and (3) the domain of the theory. (Author/AM)

The ability of children between the ages of two years and four years, eight months, to produce locative pre- or postpositions was investigated in English, Italian, Serbocroatian, and Turkish to discover universals of conceptual and communicative development. (Author/AM)

This study of the acquisition of kinship terms in English is a test of the hypothesis that lexical items are learned in their order of complexity and of the validity of relational analysis in predicting the order of the acquisition of kinship terms. Earlier studies of kinship terms, Piaget's in particular, are first discussed, as well as the…