A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Going to Scale: A Nonrandomized Nationwide Trial of the KiVa Antibullying Program for Grades 1-9
Tekijät: Karna A, Voeten M, Little TD, Poskiparta E, Alanen E, Salmivalli C
Kustantaja: AMER PSYCHOLOGICAL ASSOC
Julkaisuvuosi: 2011
Journal: Journal of Consulting and Clinical Psychology
Tietokannassa oleva lehden nimi: JOURNAL OF CONSULTING AND CLINICAL PSYCHOLOGY
Lehden akronyymi: J CONSULT CLIN PSYCH
Numero sarjassa: 6
Vuosikerta: 79
Numero: 6
Aloitussivu: 796
Lopetussivu: 805
Sivujen määrä: 10
ISSN: 0022-006X
DOI: https://doi.org/10.1037/a0025740
Tiivistelmä
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.
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.
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