Bullies and victims at school: are they the same pupils?

Background: The reported prevalence of bully-victims and aggressive/provocative victims varies quite considerably in previous research, and only a few studies have reported prevalence rates across grades. There is also a lack of detailed analyses of the extent to which victims are also bullies, and bullies are also victims.

Aims: To study the prevalence of male and female bully-victims across grade/age and to establish the degree of overlap or relative size of the bully-victim group by relating them to all victims, all bullies and all involved students.

Participation in power sports and antisocial involvement in preadolescent and adolescent boys.

Background: A limited number of mostly cross-sectional studies have examined the possible effects of power sports on aggressive and antisocial involvement in children and youth. The majority of these studies have serious methodological limitations, and results are partly contradictory. Longitudinal studies with representative, reasonably large samples and adequate dependent variables are lacking.

Personality and coping strategies during submarine missions.

Relations between personality profiles, measured by the Personality Characteristics Inventory (PCI), and habitual coping strategies, measured by the Utrecht Coping List (UCL), were investigated in a sample of submarine personnel and office employees. The predictive validity of these instruments were examined for reported stress, health complaints, and salivary cortisone measures during 3 submarine missions. PCI and UCL were completed before the missions, and questionnaires and saliva were collected weekly.