Two experiments investigated perceptual primacy of dimensional and similarity relations in stimulus classification of mentally retarded children. Results support a distinction between separable and integral stimulus structures, but do not support an integral-to-separable shift in perceptual development. Results suggest implications for…

Investigated the effect of using gender as a functional category in elementary school students' gender stereotyping. Results support the idea that the functional use of gender categories leads to increases in gender stereotyping, particularly among those children with less-advanced classification skills. Advanced classification skills proved to…

Compared Korean American and Anglo-American preschoolers' social and play behavior to determine the influence of culture on early development and to understand how culture shapes and organizes the environment in which children's social and play activities take place. Suggests that children's social interaction and pretend play are influenced by…

Examined the stress vulnerability of infants with disorganized/disoriented attachment patterns by measuring salivatory cortisol levels in 19-month olds following the Ainsworth Strange Situation procedure. Indicates that infants' disorganized attachment behavior reflects a vulnerability to stressful stimulation, suggesting a model of stress…

Examines the effects of persistent economic hardship on children. Both black and white children who experienced persistent family economic hardship demonstrated problems in peer relations, showed conduct problems at school, and reported low self-esteem. Connections between persistent economic hardship and psychosocial adjustment were more…

Examined the effect of residential and school mobility in the academic performance of 5- to 15-year-old maltreated children. Found that maltreated children encounter more academic difficulties in part because they experience relatively high levels of residential mobility and school transfer. Found little evidence to support the role of mobility in…

Three studies examined children's ability to differentiate aggression and social withdrawal using attributional constructs. Found that even very young children understand the meaning of responsibility and are capable of using it to act as intuitive judges, weighing the evidence to make inferences about responsibility and then meting out judgments…

Investigated homesickness in boys ages 8 through 16. Results indicated that homesickness was prevalent and varied in intensity, was experienced as a combination of depression and anxiety, was presented most often as internalizing behavior, and was more typical for younger boys. The most-homesick became increasingly so during the separation,…

Examined changes in prosocial moral reasoning and gender differences in prosocial reasoning over 15 years. Found that hedonistic reasoning declined and then increased somewhat; needs-oriented and stereotypic reasoning increased and then declined with age. Direct reciprocity and approval reasoning showed no decline into early adulthood, contrary to…

Examined the role of individual characteristics and peer influences in evoking early substance abuse in young boys. Individual characteristics, such as fighting, hyperactivity, oppositional behaviors, and likability, were found to be pivotal in the development of substance abuse--more than friends' deviance. Results suggest that prevention…

Examined academic achievement under a cultural motivational framework. Asian American students' performance in mathematics was found to be between that of Chinese and Japanese students and that of Caucasian Americans. Suggests that academic achievement reflects a cultural heritage that emphasizes education and the ability of all persons to benefit…

Takes the position, contrary to that of Sandra Scarr, that the details of socialization patterns are crucial to an understanding of normal and deviant development. Research is cited to support the argument that better than adequate parenting optimizes the development of both normal and vulnerable children and that parents' belief in their own…

Key components of human behavioral genetics and Sandra Scarr's work of the past two decades are critically reviewed based on scholarship in animal neuropsychology and clinical and educational psychology. Scarr's opinion that interventions to enhance intellectual development are ineffectual for children from abuse- and neglect-free backgrounds is…

Posits that an evolutionary perspective can unite the study of the typical development for and individual variation within a species and that environments within the normal range for a species are required for species-normal development. Individual differences in children reared in normal environments arise primarily from genetic variation and…

Investigated genetic change and continuity within the domains of temperament, emotion, and cognition and language for 200 pairs of twins assessed at 14 and 20 months of age. Correlations of measures at the two ages indicated that individual differences in the second year of life showed greater change than continuity on most measures. (MDM)