Stability and predictive validity in the language and play development of 41 toddlers were studied. Links between language and symbolic play of toddlers were examined at 13 and 20 months in terms of homotypic, heterotypic, or mediated models of association. In the homotypic model, performance on a variable is related to performance on the same…

The incidence and nature of depressed and nondepressed mothers' unpremeditated "teaching" behaviors was investigated during 8-minute periods of videotaped interactions between each mother and her toddler and a suitcase full of toys. Diagnosed mothers had experienced depressive episodes during their child's lifetime. Nondepressed mothers…

Stability of temperament over successive ages in the first 2 years was evaluated for 109 full-term and 81 preterm infants who were assessed at 6, 9, 12, 18, and 24 months of age. At each age subjects were engaged in a series of age-appropriate vignettes in the laboratory; experimenters used a structured sequence of activities. Composite ratings…

Case studies are presented for two early talkers, one of whom represents a striking dissociation between vocabulary size and mean length of utterance. Each child is compared to controls in the same language stage, and the data are examined to determine whether the dissociation is best characterized as one between grammar and semantics, or a…

The development of a new parent report instrument, Inventario del Desarollo de Habilidades Communicativas, is reported and 5 studies carried out with the instrument for 328 children aged 8 months to 2 years/7 months are presented. Among the findings are similar trajectories of development for Spanish- and English-speaking children and for children…

Professionals and 16 mothers of disabled infants/toddlers completed the Evaluation and Programing System-I and the Parent Form Level I, respectively. Results indicated moderate to high correlations between professionals' assessments and mothers' assessments, though mothers tended to rate children higher. (Author/JDD)

Examined word retrieval in 14- to 24-month-olds. Found that children with limited productive vocabularies were less likely to produce labels of hidden objects than children with larger vocabularies, even though all could name them and did well when asked to find them. Pictorial cues facilitated word retrieval. Naming errors peaked among children…

Topic choice, topic synchrony, and utterance function during mother-child play sessions at age 3 were examined in 32 late talkers and 21 comparison children, matched at intake on age, socioeconomic status, and nonverbal ability. Late talkers and comparison children did not differ in number of utterances, topic initiation, topic synchrony, use of…

Expressive language outcomes measured by MLU and the Index of Productive Syntax (IPSyn) at ages 3 and 4 were investigated in 34 late talkers with normal receptive language and in 16 typically developing comparison children matched on age, socioeconomic status, and nonverbal ability. Late talkers made greater gains than comparison children between…

This article reports 2 experiments examining the changing role of iconicity in symbol learning and its implications regarding the mechanisms supporting symbol-to-referent mapping. Experiment 1 compared 18- and 26-month-olds' mapping of iconic gestures (e.g., hopping gesture for a rabbit) vs. arbitrary gestures (e.g., dropping motion for a rabbit).…

Background: This study investigated the occurrence, cross-informant agreement, 1-year stability, and context characteristics of externalizing behaviors in 12-month-old children, as compared to 24- and 36-month-olds. Method: In a general population sample of 786 12-month-olds, 720 24-month-olds, and 744 36-month-olds, the CBCL/1 1/2-5 was obtained…

Purpose: The purpose of this study was to examine and compare the development of proto-imperative and proto-declarative utterances in normally developing, non-neonatally screened, profoundly deaf toddlers. Method: Both types of proto-declarative are considered to be the most basic prelinguistic and early linguistic communicative functions.…

The home-based intervention program Video-feedback Intervention to promote Positive Parenting and Sensitive Discipline (VIPP-SD) was tested in a randomized controlled trial with 237 families screened for their 1- to 3-year-old children's relatively high scores on externalizing behavior. VIPP-SD, based on attachment theory and coercion theory,…

A random sample of 95 toddlers in day care was rated by parents on the Child Behavior Checklist/2-3 (CBCL/2-3). Toddlers received nonparental care an average of 33 hours per week and the majority began day care by 5 months of age. The sample consisted of middle-class toddlers in medium-size cities in Connecticut. Day care was from relatives,…

Babbling samples from 11 normally hearing infants and 14 hearing-impaired (HI) subjects, aged 4-39 months, were analyzed. Differences were observed between consonantal phone inventories of hearing-impaired subjects and hearing infants, between inventories of HI subjects with sensori-neural loss and those with conductive loss, and between younger…