Examined role of infant and toddler temperament in predicting 2-year olds' empathy. Found that children showed relatively more concern for mother's distress, but were also responsive to unfamiliar victims. Unreacting infants showing little affect also showed less empathy toward the unfamiliar adult almost two years later. Inhibition toward…

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…

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…

Part of an 18-month longitudinal investigation of mother-child language-teaching interactions, this study describes changes in mothers' use of elicting strategies over time as their children's language became more complex. The focus was the adjustments mothers make to fit their behavior to their child's linguistic skills and development. Samples…

The predictive relation between neonatal behavior and temperament at 24 months was examined for 67 infants selected from the full socioeconomic status (SES) distribution. Initial ratings were made when the infants were one to four days old. Irritable neonates were rated as more upset, less attentive to stimuli, and less responsive to the staff at…

Examined contribution of temperamental inhibitory control to conscience development. Found longitudinal stability in inhibitory control from toddlerhood to early school age, with inhibitory control increasing with age, and girls outperforming boys. Reaffirmed links between inhibitory control and multiple, diverse measures of children's conscience…

Assessed emotionality of firstborn boys at 3 months, parenting behaviors at 15-33 months, and infant inhibition at 36 months. Found that children's inhibition was predicted by supportive parenting and by a combination of infants' high negative emotionality rating and low positive emotionality rating. Parenting influences were more apparent for…

Free play and elicited language samples were obtained monthly for 10 to 12 months from five late talking children. Analysis indicated that three of the children resolved their late onset of speech by 33 to 35 months of age. Both quantitative factors (e.g., limited phonetic inventory) and qualitative factors (e.g., atypical error patterns) were…

Reports a study of two- and three-year-olds' acquisition of complex sentences with perception and epistemic verbs that took a second verb in their complements. Complement types, complementizer connectives, and the discourse contexts in which complementation occurred were specific to individual matrix verbs. (Author/CB)

A longitudinal study of four 17- to 33-month-olds revealed that their linguistic selection at the one-word stage was governed by principles of informativeness, while the two-word stage was characterized by new, or a combination of new and old, information. (Author/CB)

This study investigated developmental patterns of acquisition of the unrounded U.S. English vowels, by following 6 normally developing children from 22 to 30 months of age. Three classes of production errors were identified: intertrial production variability, context-sensitive substitutions, and context-free systematic substitution patterns.…

Investigated developmental patterns of cognitive performance over first 3 years of life in sample of 762 low birthweight premature children. Intelligence test scores were obtained at 12, 24, and 36 months adjusted age. Five developmental patterns were identified. Results reveal patterns of cognitive development can be discriminated by three…

Word learning by young children is viewed as a problem deriving from the use of forms of discourse texts. Uses of causal and temporal terms in private speech by a child studied longitudinally from 1;9 to 3;0 are analyzed from this perspective. (Contains 38 references.) (JL)

The development of object play was longitudinally examined in 40 children ages 11 to 27 months. The types of object play observed in nondisabled children were observed in children with disabilities at comparable developmental ages. Duration and frequency of active involvement with objects were greater for nondisabled children than for children…

Presents longitudinal case studies of the successive phonological acquisition of two Cantonese-English bilingual children, aged 2;3 to 3;1 years and 2;9 to 3; and 5 years. Children were assessed at four-week intervals. Phoneme-acquisition data and phonological process data revealed that both children had separate phonological systems for the two…