For the past 25 years, researchers have investigated language input to children from high- and low-socioeconomic status (SES) families. Hart and Risley first reported a "30 Million Word Gap" between high-SES and low-SES children. More recent studies have challenged the size or even existence of this gap. The present study is a…

Children's speech development begins in infancy. The pattern of this development has been explored in studies over a number of years using a range of research methodology and approaches to investigation. A systematic review of the existing literature was carried out to determine the collective contribution of this literature to our understanding…

An infant's vocal capacity develops significantly during the first year of life. Research suggests early measures of pre-speech development, such as canonical babbling and volubility, can differentiate typical versus disordered development. This study offers a new contribution by comparing early vocal development in 10 infants with Fragile X…

The purpose of this study was to establish a set of normative data (growth curve and centiles) for the Infant Monitor of vocal Production (IMP) using a representative population of infants with typically developing hearing. A linear mixed effect model and regression was used to derive 'stage-for-age' trajectory and growth centiles from the…

Background: Early intervention for children identified as late talkers (LTs) at the age of 24 months is still a controversial issue in research and clinical routine. Previous studies have shown inconsistent results regarding predictors of early lexical deficits on school-age outcomes of late-talking toddlers. Methods: In a five-wave follow-up…

Examines phonetic variation in multisyllable babbling of infants from 7 to 11 months of age. The investigation was to verify assumptions that, in infant vocal development, there is a systematic increase in the phonetic variation of these babbles, and separate stages of repetitive and nonrepetitive babbling are posited. (22 references) (GLR)

The acquisition of two types of anaphora, reflexive and non-reflexive personal pronouns, was investigated. It was hypothesized that the two types of anaphora are acquired at different developmental stages. The three experiments involved Dutch children of age 6 and 7 and adults. Interpretations of sentences containing third person reflexive…

Describes a study designed to explore the nature of early use of two forms of the perfect--the present perfect and the present perfect progressive--by children over three years old. Three factors were found to influence children's selective imitation and paraphrasing of the perfect: verb form, semantic sense of the perfect, and duration of the…

Describes a study that tried to answer the following: (1) Are the passives of all actional verbs equally easy to understand? (2) Are the passives of all experiential verbs in a child's vocabulary about equally hard to understand? (3) Does comprehension of passives differ from verb to verb in a category? (SED)

Describes a study designed to discover how children approach the mass-count distinction as it applies to the use of "much" and "many." Results indicate that children do not approach the co-occurrence conditions of "much" and "many" with various nouns from a semantic point of view, but rather from a…

Examines the understanding of the pragmatic function of mental terms ("think,""know,""guess") to express the relative certainty of 69 children aged 3-11. Results showed an improvement with age for the "know-think" and "know-guess" contrasts, but no improvement with age for the…

Two studies investigated linguistic representations underlying English-speaking 2.5-year-olds' production of transitive utterances. Findings indicated that children trained with pronouns and nouns could produce a transitive utterance creatively with a novel verb. Results suggest that English-speaking children build many of their early linguistic…

The basis for acquisition of categories in child language was investigated. The early encoding of the distinction between mass and count nouns was examined to determine whether children categorize them on the basis of semantic type or syntactic regularities. An experiment was designed in which semantic and syntactic cues were in competition:…

Children's acquisition of agent nouns within a framework of morphological structural principles is explored. Language acquisition has been conceptualized as a process of parameter setting in which the learner is richly endowed with a vocabulary of primitives and rule schemata. Exposure to the primary data will be filled in from the range of…

Examines factors that contributed to unexpectedly large gains in verbal competence among a diverse and representative sample of urban first graders. Concludes that exceptionally high growth in the first grade is associated prominently with the characteristics of teachers and the maturity/personality and academic self-image of the students.…