Our research group established by the Department of Psychology at the College of Nyíregyháza investigates the phenomena of school bullying and harassment. The term 'school bullying covers the behaviour where the aggressive act has no obvious cause (non-reactive aggression).Our research focuses on the question that among upper school primary school students and high school students what kind of background factors may stand in the background of aggressive attitude and behavior patterns of school bullying (bully, victim, bystander, intervener participant and helper participant). During our research, we charted those background factors, which help to understand the process of the development of bully, victim, participant and bystander behavior patterns, as well as they allow the development of the options of efficient mental hygiene.In this book we examined the relation between Assistant (intervener participant) and Samaritan (helper participant) behavior patterns in school bullying and certain parental treatments (such as; parental solicitude, parental overprotection and parental restriction). We wanted to find an answer to the question: what kind of temperament and character traits the students have, who become bullies through school bullying and what their typical emotional reactions are.