Examined acquisition of the mass/count distinction in English. Results indicated that at 7 years bilinguals did not infer from the linguistic context whether new nouns referred to objects or a substance. By 9 years, bilinguals who were strong in English responded similarly to monolingual peers, but bilinguals with lower English abilities still…

Three studies examined the developmental relationship between early linguistic and cognitive achievements. Findings showed that children's ability to classify objects in a spatial or temporal order was independent of advances in productive vocabulary growth, suggesting that developments in categorization and naming depend on abilities in addition…

Examined validity of Strange Situation attachment classifications for infants with and without extensive child-care experience and the association of early child-care experience with attachment security. Found that infants were less likely to be secure when low maternal sensitivity was combined with poor quality child care, more than minimal…

Investigated predictors of peer sociometric nominations among boys with and without attention-deficit hyperactivity disorder (ADHD). Found that aggression, covert antisocial behavior, and authoritative parenting beliefs predicted negative peer status and peer social preference. Aggression predicted peer rejection more strongly for comparison than…

Assessed parents' beliefs about former Head Start children's abilities and values in academics, sports, and social skills during their kindergarten year. Found that there were ethnic differences in parents' beliefs about children's abilities and future prospects in different areas. Parents' beliefs related to children's attitudes toward school and…

Examined effects of early supportive parenting on children's school adjustment. Found that supportive parenting (maternal warmth, proactive teaching, inductive discipline, and positive involvement) predicted adjustment (behavior problems, social skills, and academic performance) in grade 6, even after controlling for kindergarten adjustment and…

Compared Chinese and Canadian 7-, 9-, and 11-year-olds' moral evaluations of lie- and truth-telling in stories involving pro- and antisocial behavior. Found that Chinese children rated truth-telling less positively and lie-telling more positively in prosocial settings than Canadians. Both rated truth-telling positively and lie-telling negatively…

Examined influences on African-American children's cognitive development between 6 months and 8 years. Found that more optimal patterns of development were associated with intensive early educational child care, responsive home stimulation, and higher maternal IQ. Child care experiences were related to cognitive performance through enhancing…

Used two path models to examine the influence of ethnic identity and intergroup contact on adolescents' attitudes toward other ethnic groups: (1) ethnic identity increases with age and predicts positive in-group attitudes which contribute to positive out-group attitudes; and (2) diversity outside school leads to more out-group interaction in…

Two major advances in developmental brain sciences have implications for understanding development: (1) neuroimaging; and (2) molecular and cellular events that give rise to the developing brain and ways in which the brain is modified by experiences. Critical, new knowledge of behavioral development can be achieved by considering the…

Conducted meta-analysis of 66 studies on parental antecedents of attachment security. Found that maternal sensitivity was an important but not exclusive condition of attachment security in normal settings. Mutuality, Synchrony, Stimulation, Positive Attitude, and Emotional Support were associated with security. Advocated a contextual level to…

Focuses on definition of sensitivity, developmental changes in sensitivity, and clinical implications of attachment. Maintains that promptness, consistency, and appropriateness are the main components of sensitivity across parenting dimensions. Suggests that studying infant antecedents to attachment security is equally important to that of parent…

Suggests future directions for study of sensitivity and its impact on early psychosocial development: (1) renewed attention to growth of attachment in context of other developing features of the parent-child relationship; (2) factors that moderate impact of sensitivity on developing security; (3) origins of individual differences in sensitivity;…

Maintains that it is important to distinguish theory testing from effect-size evaluation when considering the impact of mothering on attachment security. Contends that it is possible that the De Wolff and van IJzendoorn meta-analysis both over- and underestimates mothering effects, as would be the case if infants varied in their susceptibility to…

Argues that although meta-analysis makes an important contribution to summarizing attachment studies, it limits the conceptual understanding to simple causal models and ignores family systems models that could illuminate the development of secure and insecure attachment. Maintains that fathers' role in attachment and the impact of the quality of…