Notes two faulty aspects of the Reznick et al., twin study (PS 526 688): the expressive language measure at 14 months, which has practically no spread of item difficulty, as well as measures included to assess specific cognitive characteristics; and the notion of infant transition as it affects interpretation of the results. (HTH)

This article summarizes proposed benefits of children's play and critically reviews the empirical evidence which supports or refutes the explanatory model. It concludes with suggestions for future research to explicate more fully the developmental benefits of play for the child. (JD)

This article suggests that a Piagetian approach to education of the deaf can be applied to understanding what occurs as a deaf child comes to a point of knowledge. The article reviews current research on the relationship between language acquisition and cognitive development, and applies this research to education of deaf children. (Author/JDD)

Results of three investigations of the development of word definitions indicated that younger childrens' definitions, including use or lack of use of superordinate categorical terms, fell short of adult informativeness, while, by age 10, children generally met such criteria in their definitions. (Author/CB)

In a study of early functions of negation (rejection and denial), 48 children under age 3 were asked easy yes/no questions. The most likely age range for the appearance of error-free denial "no" at 1 year/8 months to 2 years/1 month supports the continuity theory of negation development. (Contains 27 references.) (Author/LB)

Assessments of temperament, emotion, cognition, and language acquisition were obtained for 200 pairs of 14-month-old twins. Comparisons between the assessment correlations for identical and fraternal twins indicated an influence of genetics on inhibition, activity, temperament, empathy, negative emotion, spatial memory, categorization skills, and…

In response to Leonard (EC 600 867), two aspects of language development are identified in which the discrepancies between domains of language and/or cognitive development often observed in specific language impairment children occur naturally as a consequence of individual variation in rate of development together with relative independence of…

Reviews some of the major cognitive, social, and emotional achievements of young children and discusses some of their limitations. Divides description of development into intellectual, language, social, and emotional development. Notes that this division represents adult categories of thought and does not represent young children's actual modes of…

This response to Fey (EC 604 058) reviews recent advances in phonological theories, including autosegmental, metrical, and lexical phonology, and their potential applications. A new theory of developmental change that is also cognitive in orientation is presented, along with some suggestions for clinical applications. (DB)

Reviews research on quantitative and qualitative indexes of play, and relationships between play and language. Finds consistent relationships between duration and level of play throughout early development, and parallel developments in play and language. Indicates that measures of spontaneous activity and habituation in infancy predict…

Preschoolers' performance on two tasks demonstrated that, given a perceptually available set of dolls, they were able to use number words to determine the quantity of a hidden or nonexistent set of items that was in a known ratio to the available set. (MM)

Four studies examined the influence of essentialist information such as internal properties and perceptual similarity on 3-, 4-, and 5-year olds' interpretations of labels. Results suggested that children have essentialist beliefs about animals, but not about artifacts, and that these beliefs interact with children's assumptions about word meaning…

Six match-to-sample picture/object selection experiments explored 3- to 5-year-olds' knowledge about superordinate words and acquisition of this knowledge. Findings indicated that number of standards (one versus two), types of standards (different versus same basic-level categories), and nature of representation (pictures versus objects)…

Presents emergentist coalition theory of language development characterizing lexical acquisition as the emergent product of cognitive constraints, social-pragmatic factors, and global attentional mechanisms. Details 12 experiments with 12- to 25-month-olds using the development of reference as test case of the theory. Presents evidence that…

Describes the richness of Hollich et al.'s model of language acquisition. Presents concerns about focus on object words in word learning research, the phantom child in the model, and the missing affect in theories and research on word learning. Suggests that experimental work inspired by principles and constraints theory and observational work…