Person:

Pan, Barbara

This study investigated predictors of growth in toddlers’ vocabulary production between the ages of 1 and 3 years by analyzing mother – child communication in 108 low-income families. Individual growth modeling was used to describe patterns of growth in children’s observed vocabulary production and predictors of initial status and between-person change. Results indicate large variation in growth across children. Observed variation was positively related to diversity of maternal lexical input and maternal language and literacy skills, and negatively related to maternal depression. Maternal talkativeness was not related to growth in children’s vocabulary production in this sample. Implications of the examination of longitudinal data from this relatively large sample of low-income families are discussed.

This study examined parental report as a source of information about toddlers’ productive vocabulary in 105 low-income families living in either urban or rural communities. Parental report using the MacArthur Communicative Development Inventory – Short Form (CDI) at child age 2;0 was compared to concurrent spontaneous speech measures and standardized language assessments, and the utility of each source of data for predicting receptive vocabulary at age 3;0 (Peabody Picture Vocabulary Test) was evaluated. Relations between language measures of interest and background variables such as maternal age, education, and race/ethnicity were also considered. Results showed that for the sample as a whole, parental report was moderately associated with other language measures at age 2;0 and accounted for unique variance in PPVT at age 3;0, controlling for child language skills derived from a standard cognitive assessment. However, predictive validity differed by community, being stronger in the rural than in the urban community. Implications of significant differences in background characteristics of mothers in the two sites are discussed.

Objective. The goals of this study were (1) to examine the extent of variation in amount and lexical diversity of maternal talk to young children within a sample of low-income families, (2) to determine the patterns of change over time in maternal talk during the early childhood years, and (3) to consider specific predictors of variation in maternal communicative input. Design. Low-income mother – child dyads (n = 108) were videotaped at child ages 14, 24, and 36 months during semistructured play in the home. Videotapes were transcribed and analyzed using the conventions of the Child Language Data Exchange System to determine amount (word tokens) and lexical diversity (word types) of maternal talk to children. Background information collected from mothers at study entry served as predictors of variation in communicative input. Individual growth modeling methods were used to analyze data. Results. Mothers varied greatly in the number of tokens and types produced during interaction. Mothers were found to increase in their total amount of talk and diversity of vocabulary as children aged. In addition to child age, maternal education, language and literacy skills, depression, and age helped explain variation in level of maternal talk, but none of the predictors explained variation in growth. Different combinations of predictors explained variation in tokens versus types. Conclusions. Findings highlight the importance of studying specific predictors of parental talk to children, as even in low-income samples large variation in communicative input is evident.

The purpose of this study was to provide descriptive information about low-income fathers’ and mothers’ talk to toddlers and to re-examine the bridge hypothesis (Gleason, 1975) in light of current changes in family structure and childcare responsibilities. Thirty-three father–child and mother–child dyads were videotaped during semi-structured free play at home. Fathers’ and mothers’ talk to children did not differ in amount, diversity of vocabulary, or linguistic complexity as measured by mean length of utterance. However, fathers produced more wh-questions and explicit clarification requests, thus presenting more conversational challenges to children. Resident fathers employed more direct forms of prohibitives. Results suggest the need for closer examination of factors related to child-directed speech in varying family configurations.