Based on a doctoral dissertation presented by the first-named author in partial fulfillment of the requirements for the Ph.D. degree under the supervision of the second-named author

Longitudinal data concerning fear responses in 30 boys and 30 girls observed from ages one month to 8 1/2 years suggest that in males--but not in females--a predisposition to a particular level of fearfulness is set by events that occurred before 6 months of age. (Author/MG)

Investigated sex differences in the behavior patterns of toddlers and subsequent parental reactions. Data was obtained from observations in the homes of subjects, and compared to parents' answers on a child rearing questionnaire. (DP)

Five studies are reported which examine the free vs. earned reward phenomenon in humans. The 420 subjects were distributed over all grade levels from preschool through college. Candies and coins were used as rewards. In preschool through sixth grade groups, black, as well as white subjects and experimenters were used. The California Psychological…

Tests the ability of 43 children, ranging in age from 20 months to 40 months, to discriminate between pictures of boys and girls and male and female adults. Compares children who passed this gender-task with those who failed it on three behaviors most often categorized as sex-typed: toy choice, aggression, and peer playmate selection. (HOD)

Recent research indicates that early right brain hemisphere specialization for spatial tasks may be due to sex differences. Early specialization has been demonstrated in males asked to perform spatial tasks. An apparently longer period of female brain plasticity may explain why males have a higher incidence of developmental language problems. (MA)

Analyzes relationships between directly observed infant and mother behavior and infant temperament characteristics, as described in maternal ratings; separates the effects of different variance components in prediction of the observed behaviors; and explores possible interactions between infant sex and infant temperament in determining both infant…

This paper presents a model workshop focused on sex-typed behavior and developmental psychology, which is designed to examine the major theories based on biology, socialization or a complex developmental process. The materials concentrate on the three main theoretical approaches underlying the development of sex-role behaviors, i.e.,…

Observes parents' socialization practices in 24 homes of families with first-born infants at 11, 14, and 17 months of age. Four kinds of socializing practices were observed and compared by parents' sex, infants' age, and infants' sex. (HOD)

Presents the behavioral diversity "win-win" model that teaches individuals to discover powerful insights about themselves and others. Providing a clearer understanding of the unique characteristics of individuals, the model also provides a basis for comprehending the behavior of others, enabling people to achieve positive outcomes from…

Investigated the role of behavioral style and cognitive performance as predictors of cognitive development in extremely low-birth-weight children assessed at age 2 and again at age 4. Found stability of cognitive performance from 2 to 4 years of age; this as well as behavior style and orientation-engagement predicted subsequent cognitive…

Fixation time, smiling, vocalization, and fret/cry were recorded to obtain a complete picture of infants' responses to facial stimuli over the first year of life. Four stimuli were presented to 120 infants. Results of fixation data indicate that (1) there is a marked decrease in fixation toward facial stimuli within the first year, (2) at all ages…

In response to reports that have received widespread attention decrying the failure of science education in the United States to prepare sufficient numbers of scientists, projects have sought to determine what can be done to encourage academically oriented youths to enroll in more science courses in high school and preserve their option of going…

This book, the first in a series on development and behavior of human infants and animals, contains a collection of articles dealing with the significance of the interaction between mother and infant and the subtle contributions that each makes to the other in shaping their ongoing dyadic behavior. It emphasizes that the infant is no mere passive…