VALIDASI MODUL �BERBAGI UNTUK SAHABAT� BAGI PEER FACILITATOR DALAM PENCEGAHAN BULLYING

Bullying at school has become a important social issue, because it has a negative impact on psychological and social adjustment of student, (Ttofi & Farrington, 2008). The result of initial survey by researchers on July-August 2013 to 739 student of senior highschool in Yogyakarta, explained that 13,53% had experienced bullying and 53,58% students had seen bullying at school. Preventive programs by peers is one of the efforts that can be done to prevent bullying at school. The purpose of this study is pilot training modules to improve skills of peer facilitator through case discussions method, in delivering antibullying information. The design of research used untreated control group design with pre�post test (Shadish, Cook, Campbell, 2002). Quantitative data analysis using non-parametric statistical Mann-Whitney U test by analyzing gain scores. Results of analysis shows there�s a significant skills difference in gain score between experiment group than control group. It means that hypothesis accepted, Z= -4,172 and significant p=0,001 (p