Psychometric properties of the MacArthur Communicative Development Inventory (CDI) were examined. Findings suggested that the CDI reflects the progress of language development within the age range 10 to 27 months. Findings support caution in using results to identify individuals at risk for language deficits, to compare groups with different…

Presents data showing that the MacArthur Communicative Development Inventory's (CDI) large variability, lack of stability, and insufficient ability to predict early language delay are authentic reflections of individual differences in early language development rather than measurement deficiencies. Responds to critiques regarding sociodemographic…

Examined dual representation among toddlers and preschoolers in four studies. Found that dual representation was as difficult for 2.5-year-olds with a set of individual objects as it was with an integrated model. Decreasing the physical salience of a scale model made representation easier for 2.5-year-olds. Increasing the model's salience made…

Examined whether parenting and child characteristics of term and preterm 2- and 3.5-year-olds had common paths of influence on children's independent cognitive and social functioning at age 4.5 years. Found that high levels of mothers' maintaining children's interests across these ages supported later independence, but directiveness needed to…

An extended longitudinal study compared cognitive development in children adopted from Romania before 24 months and in United Kingdom adoptees with an additional sample of Romanian children adopted after 24 months. Findings indicated that there was considerable catch-up among late-placed Romanian children but they exhibited lower cognitive scores…

Examined degree to which analytic and holistic modes of processing play a role in children's and adults' categorization of faces. Found a developmental trend from analytic to holistic processing and an effect of face inversion with increasing age. Seven-year-olds processed faces comparably to nonfacial visual stimuli, whereas a growing proportion…

Investigated children's representational ability as a cognitive factor underlying the suggestibility of their eyewitness memory. Found that the eyewitness memory of children lacking multirepresentational abilities or sufficient general memory abilities (most 3- and 4-year-olds) was less accurate than eyewitness memory of those with…

Examined the long-term consequences of mother-child mutually responsive orientation for the development of conscience at early school age. Found that mutually responsive orientation at toddler and preschool ages predicted children's conscience, even after controlling for developmental continuity of conscience. Toddler mutually responsive…

Compared behavioral, self-evaluative, and attributional responses of boys with attention deficit hyperactivity disorder (ADHD) to those of typically-developing boys on a social success and failure laboratory task. Found that ADHD boys rated their own performance more favorably than controls, were more likely to attribute success to external…

Examined loneliness and friendship among 22 high-functioning children with autism and 19 typically developing children equated for IQ, chronological age, gender, mother's education, and ethnic group. Found that children with autism were lonelier than typically developing children, had less complete understanding of loneliness, and had poorer…

Observed 18- to 30-month-olds' use of force against peers. Found no sex differences in average aggression levels or in mothers' aggression ratings. Rate of hitting peers and mothers' ratings were stable over 6 months for girls only. Toddlers especially sensitive to peers' possible intentions hit peers more and were more likely than to use force…

Examined environmental and gene-environment processes linking parenting (affect, control, responsiveness) and preschoolers' behavioral adjustment difficulties (noncompliance, conduct problems). Found that estimates of shared environmental variance and mediation were greatest for observational data, and estimates of child genetic variance and…

Tested model relating girls' pubertal timing to mothers' history of psychopathology, mediated by family discord and father absence/stepfather presence. Found that mothers' history of mood disorders predicted earlier daughters' puberty, with the relation fully mediated by dyadic stress and biological father absence. Stepfather presence best…

Examined antecedents and moderators of antisocial behavior among children interviewed annually through high school and in early adulthood. Analyses identified four configurations differing in early school dropout and criminal arrests. School extracurricular activity participation related to reduced rates of early dropout and criminal arrest among…

Examined gender and cultural differences in over 3,000 children's ideas about what leads to academic success. Found close correspondence between children's achievement and competence-related beliefs, with the exception that young girls appeared to specifically discount their talent. The effect held regardless of children's achievement,…