TY - JOUR
T1 - Going to scale
T2 - A nonrandomized nationwide trial of the KiVa antibullying program for grades 1-9
AU - Kärnä, Antti
AU - Voeten, Marinus
AU - Little, Todd D.
AU - Poskiparta, Elisa
AU - Alanen, Erkki
AU - Salmivalli, Christina
PY - 2011/12
Y1 - 2011/12
N2 - Objective: The effects of school-based antibullying programs have typically been examined on small samples, with number of schools ranging from 1 to 78 (Farrington & Ttofi, 2009). This study investigated the effectiveness of the KiVa antibullying program in the beginning of its nationwide implementation in Finland. Method: At each time point, the participants included 888 schools with approximately 150,000 students in 11,200 classrooms in Grades 1-9 (8-16 years of age; 51 boys and 49 girls). Victims and bullies were identified with the global questions from the Revised Olweus Bully/Victim Questionnaire (Olweus, 1996), utilizing the criteria suggested by Solberg and Olweus (2003). The program effects were examined by calculating odds ratios based on a cohort-longitudinal design, correcting the standard errors for clustering. Results: During the first 9 months of implementation, the KiVa program reduced both victimization and bullying, with a control/intervention group odds ratio of 1.22 (95 CI [1.19, 1.24]) for victimization and 1.18 (95 CI [1.15, 1.21]) for bullying. Conclusions: Generalized to the Finnish population of 500,000 students, this would mean a reduction of approximately 7,500 bullies and 12,500 victims.
AB - Objective: The effects of school-based antibullying programs have typically been examined on small samples, with number of schools ranging from 1 to 78 (Farrington & Ttofi, 2009). This study investigated the effectiveness of the KiVa antibullying program in the beginning of its nationwide implementation in Finland. Method: At each time point, the participants included 888 schools with approximately 150,000 students in 11,200 classrooms in Grades 1-9 (8-16 years of age; 51 boys and 49 girls). Victims and bullies were identified with the global questions from the Revised Olweus Bully/Victim Questionnaire (Olweus, 1996), utilizing the criteria suggested by Solberg and Olweus (2003). The program effects were examined by calculating odds ratios based on a cohort-longitudinal design, correcting the standard errors for clustering. Results: During the first 9 months of implementation, the KiVa program reduced both victimization and bullying, with a control/intervention group odds ratio of 1.22 (95 CI [1.19, 1.24]) for victimization and 1.18 (95 CI [1.15, 1.21]) for bullying. Conclusions: Generalized to the Finnish population of 500,000 students, this would mean a reduction of approximately 7,500 bullies and 12,500 victims.
KW - bullying
KW - dissemination
KW - evaluation
KW - intervention
KW - victimization
UR - http://www.scopus.com/inward/record.url?scp=82955239967&partnerID=8YFLogxK
U2 - 10.1037/a0025740
DO - 10.1037/a0025740
M3 - Article
C2 - 21967491
AN - SCOPUS:82955239967
SN - 0022-006X
VL - 79
SP - 796
EP - 805
JO - Journal of consulting and clinical psychology
JF - Journal of consulting and clinical psychology
IS - 6
ER -