Investigated whether and when children establish various semantic relations between old and new words. Fifty 2-year olds were taught labels for objects previously referred to by an overextended term. Findings are discussed in light of theories of lexical development, particularly with regard to conceptualizations of constraints on the acquisition…

Ostensive definitions of words are ambiguities as to their referent. In a study of infant-mother dyads engaged in looking at picture books, 95 percent of ostensive definitions referred to the whole object depicted rather than parts, attributes, or actions. When parts were named, ambiguity was avoided by naming the part and the whole. (PJM)

The hypothesis explains the early lexical development of children and the predictions of this hypothesis are shown to be consistent with available data on overextension. (Author/NCR)

Reports two studies which investigated the acquisition of color terms by preschool children. The first was designed to clarify the role of certain conceptual factors in the acquisition of color terms. The second explored how input may interact with these conceptual factors and help to guide the acquisition of color words. (SED)

A longitudinal study of three children examined the relation between object permanence and language development. (Author/NCR)