Two studies examined children's and adolescents' attitudes toward aggression. Found that boys viewed physical aggression as more hurtful than social aggression and girls rated social aggression as more hurtful. Girls rated an aggressor as more angry than did boys. Middle and high school participants viewed social aggression as indicating more…

Examined the development of proportional reasoning by means of a temperature mixture task. Results show the importance of distinguishing between intuitive knowledge and formal computational knowledge of proportional concepts. Provides a new perspective on the relation of intuitive and computational knowledge during development. (GLR)

Categorization responses of 6 and 11 year olds and adults to test stimuli were examined against predictions derived from 2 models that stressed prototypical features or information about exemplars. For six year olds, only the prototype model fit the data. For the two older groups, both models explained variance in performance. (PAM)

Examined infant facial expressions at two, four, and six months of age during face-to-face play and a still-face interaction with their mothers. Contrary to differential emotions theory, at no age did proportions or durations of discrete and blended negative expressions differ; they also showed different patterns of developmental change. (MM)

Tested children's ability to compute perspectives from locational and structural descriptions of scenes. Children from 4 to 10 years of age were given perspective-taking problems that involved abstract multicomponent scenes; responses entailed the reconstruction of alternate views. Four-year olds were unsuccessful; 10-year olds were successful…

Tested understanding of correspondence on the part of 2.5- to 3.5-year olds who watched a toy hidden in a model and tried to find an analogous toy in a room. Retrieval scores increased with increasing model-room similarity; were higher for older than younger children; and were affected by object and size similarity. (BC)

Recent research supports Vygotsky's "zone of proximal development" theory; children receiving peer assistance can stretch their learning beyond their individual accomplishment. A study of a multiage classroom revealed three strategies used by children working together to solve math problems--modeling, tutoring, and pairing/sharing…

Using a 1987 sample of 526 undergraduates, this study examines changes in student alcohol use, alcohol abuse, and attitudes toward drinking over their college careers. The maturation of attitude and behavior observed in females was not seen in males, for whom college may represent a period of protracted adolescence. (SLD)

Used time-lapse video to record sleep/wake states of preterm infants for three 24-hour periods at 33 and 35 weeks conceptional age. Found that very-low-birthweight preterm infants showed marked stability and developmental change in the organization of sleep/wake states from a very early age, and their states were related to demographic variables…

Surveys the worries of adolescents in Northern Ireland, with a focus on identifying age and gender differences. Analysis reveals that females report worrying significantly more frequently than males, particularly in regard to transition from school and personal and academic issues. Students over 16 report worrying significantly less than their…

Examined Hong Kong primary schoolchildren's self-concept in several domains over two years. Found that younger children had higher self-concept than older. Self-concept dropped drastically from grade one to three and leveled off thereafter. Girls had higher self-concepts than boys but had a greater drop. Self-concept level predicted depression,…

A population of 12-19 year-old adolescents (n = 994) was selected from a pool of 7264 students in order to study adolescent's perception of autonomy. Eleven behavioural autonomy items were elected by the adolescents and used to evaluate the frequency of desire, achievement and disobeying parents in early (12-13 year-old) and late (18-19 year-old)…

This study reviews the literature on gender issues in human development, focuses on student revealing differences in specific abilities of males and females, and discusses whether those differences are as well established as the literature suggests. The research literature is examined from the following perspectives: perception, physical/motor…

This technical report describes a series of three studies designed to instruct students in the relationship between texts, comprehension questions, and two sources of answer information--the text to which a given question refers and their own background knowledge. The focus of the technical report is on individual differences in the amount and…

This study explored adolescent age and gender differences in patterns of emotional self-disclosure to parents and friends. An additional purpose was to describe how familial and individual developmental characteristics influence patterns of adolescent emotional disclosure. The sample consisted of 174 junior high school students between 12 and 15…