Knowledge about guns and the relation between play with guns and aggressivity was assessed in a group of 5-9 year old children. Each child was questioned about his gun play and his understanding of guns after he was shown a display of two toy and two real guns. This data was then correlated with a teacher rating of aggression for each child.…

Frequency of aggression in 5- to 8-year-old children was examined in relation to frequency of helping, comforting and sharing. Subjects (39 boys and 40 girls attending a summer day camp) were each observed for two hours and their aggressive and prosocial behaviors recorded. This study differed from previous investigations of this issue in two…

Changes from the expected life course can arise from at least three different reasons in longitudinal work: developmental novelty, errors in diagnosis, and errors in expectation. This longitudinal study examined the social development of 220 fourth graders and 475 seventh graders over a period of 10 years with over 98 percent of the original…