In response to community concern about developmental effects on children who play with toys that portray antisocial, violent, or militaristic themes, two government committees were set up to investigate the issue. Psychologists have argued that playing with such toys may increase antisocial and aggressive behavior in children and have long-term…

Researchers have found it difficult to measure various forms of indirect aggression, such as exclusion from groups, because such behaviors are difficult to observe in field settings such as school playgrounds. This study examined gender and developmental differences in aggression, investigated across-gender aggression, and looked at teachers'…