Tested a normally developing child several times between 16 and 27 months of age for his ability to derive the relations between stimuli. Found that the child derived "mutual entailment" relations and showed "nonverbal exclusion" as early as 17 months. "Combinatorial entailment" relations and "verbal…

Observed toddlers' imitation and responses to maternal control. Found that girls imitated more than boys. Responsive imitation measures were coherent and longitudinally stable, and correlated significantly with responsiveness to maternal control. Suggested that a young child's willingness to imitate parent in a teaching context and to comply in a…

Examined data from NICHD study to determine relationship of children's child care experience to peer competence at 24 and 36 months, after controlling for effects of family and child characteristics. Found consistent, modest relations between early child-care experiences and peer competencies. Maternal sensitivity and children's cognitive and…

This is the 31st Annual Report to Congress on the Implementation of the "Individuals with Disabilities Education Act," 2009. Section 664(d) of the "Individuals with Disabilities Education Act" ("IDEA") (P.L. 108-446), as reauthorized in 2004, requires that the Department of Education report annually on the progress…

This study was designed to assess genetic influence on behavioral inhibition and its varying expression in 92 monozygotic and 86 dizygotic twin pairs. Infant behavior and mother-child interaction were observed and videotaped during structured play sessions at age 14, 20, 24, and 36 months. Analysis of the results suggests that most of the overlap…

A longitudinal investigation of the social and cognitive development of male twins was conducted when twins were 2.5 years of age, and again when they were 8- to 10-years-old. This study was designed to re-examine the heritability of the traits studied at the earlier age and, thus, to address the question of the stability of genetic determination.…

Examined in a longitudinal study of children were correspondences and correlations between early language development on the one hand, and the manipulation of objects and play development on the other. There were developmental correspondences between the onset of five language landmarks (the emergence of first word, referential word, demonstrative…

Examined how parenting style and inter-parental conflict lead to changes in toddler boys' inhibition between ages 1 and 3. Found that boys who are less inhibited than expected at age 3 have parents who are relatively more insensitive, intrusive, and negative in parenting style than are parents of children who remain more consistent over time.…

As part of a larger longitudinal study, scores of 239 children (ages 1 to 4) with disabilities on the Battelle Developmental Inventory (BDI) were compared with scores on the Woodcock-Johnson Test of Achievement (Revised) 1 to 3 years later. The BDI scores from children at or above age 2 predicted later achievement scores (mean correlation .74).…

Longitudinal data for 63 inner-city African American and Puerto Rican adolescent mothers and their firstborn children were used to examine relations among level of maternal depressive symptoms, mother-toddler conflict and contingent responses observed in play interactions, and maternal reports of child problem behaviors of toddlers of different…

Examined data on 900 European American children from the NICHD Study of Early Child Care to explore links between maternal employment during the child's first year and child cognitive outcomes. Found that maternal employment by the child's ninth month related to lower school readiness scores at 36 months, with more pronounced effects for certain…

This longitudinal study examined the development, antecedents, and concomitants of empathic concern in the second year of life among 125 first-born girls. Findings indicated that empathic concern for mother's simulated distress increased from 16 to 22 months, whereas empathy for a stranger's simulated distress decreased. Fearful temperament and…

Assessed the attachment of 101 toddlers to their mothers and day care teachers by the Strange Situation Procedure or Q-Set measures. Results were consistent with the hypothesis that children's relationships with their parents and day care teachers would show similar attachment classifications. (BC)

The vocalizations and speech production of 20 infants with hearing impairments were examined at three age levels: between 5-13 months, 2-5 years, and 5-10 years. Degree of hearing loss had a significant and moderately strong relationship with speech outcome at the second and third age levels. (Contains extensive references.) (Author/CR)

Longitudinally compared the production of syllable shapes in 10-minute spontaneous speech samples of 20 children with expressive specific language impairment (SLI-E) and 15 typically developing (TD) peers from 24 to 36 months of age. Results are discussed. (Author/VWL)