Four socialization environments, all of which included some modeling of altruism by an adult, were differentially effective in altering children's responsiveness to others in circumstances of distress. (Authors)

Role theorists maintain that good same-sex parent models are necessary for children to develop knowledge of appropriate sex roles. Cognitive theorists say that development of such knowledge depends on contact with good models, but models need not be parents. In the first phase of the study, children's knowledge of adult sex roles was determined…

Human development from about ages 2 to 5 is presented in terms of the history of a child conceptualized in terms of stimulus and response functions and his interactions in current situations which consist of organismic, physical, and social conditions. The concepts describing the changes that occur during this developmental period, such as…