23 www.pedijatrijadanas.com Objective - The aim of the present study was to assess if girls and boys who are classified as bullies, victims, bully/victims and neutral differ in Eysenck's personality dimensions. Subjects and method - Three hundred and seventy-two chil- dren, age range 10 to 14 years (mean age 12.3±1.6 years) com- pleted a School Relationship Questionnaire (SRQ) and the Junior Eysenck Personality Questionnaire (EPQ Junior). To examine whether there are differences in the studied dimensions of per- sonality with regard to their roles in bullying behavior and the gender of the respondents, we used one–way analysis of variance (ANOVA) with Tukey HSD Post Hoc analysis. Results - Based on the results of the SRQ, 57% of children were classified as involved in bullying behavior, either as bullies (13%), victims (16%) or bullies/victims (28%), while 41% were neutral. Girls showed significantly higher levels of neuroticism (F (1.325) = 9.983, p<0.001) and dissimulation tendency (F(1.331) = 7.270, p<0.05) than boys, while boys showed significantly higher le- vels of psychoticism (F(1.331) = 37.632, p<0.001). Bullies and bully/victims had higher levels of extraversion (F(3.323) = 3.105, p <0.05) while victims and bully/victims were found to have higher levels of neuroticism (F (3.325) = 20.390, p<0.001) com- pared to neutral. Significantly higher levels of psychoticism (F (3.331) = 13.929, p<0.001) were found for bully/victims in re- lation to bullies, victims and neutrals. Victims had significantly higher levels of psychoticism in relation to neutral, and bullies in relation to victims and neutrals. Significantly higher levels of affinity towards dissimulation (F (3.331) = 23.916, p<0.001) were found for neutrals in relation to bullies and bully/victims, and for victims in relation to bullies and bully/victims. Conclusion - Differences in Eysenck’s personality dimensions were found with regard to gender and role in bullying behavior. A higher level of psychoticism was found in boys, while girls had Kristina SESAR 1 , Nataša ŠIMIĆ 2 , Marijana BARIŠIĆ 3 ROLES IN BULLYING BEHAVIOR AND EYSENCK'S PERSONALITY DIMENSIONS IN ELEMENTARY SCHOOL CHILDREN 1 Center for Mental Health Siroki Brijeg Health Care Center Bosnia and Herzegovina 2 Department of Psychology University of Zadar, Croatia 3 Department of Psychology University of Mostar Mostar, Bosnia and Herzegovina Kristina Sesar Center for Mental Health Siroki Brijeg Health Care Center Dr. J. Grubišića 11 88220 Široki Brijeg Bosnia and Herzegovina e-mail: kristina.sesar@tel.net.ba Tel.: + 387 39 703 870 Fax: + 387 39 704 936 Received: May 31, 2010 Accepted: January 12, 2011 Copyright © 2009 by University Clinical Center Tuzla. E-mail for permission to publish: pedijatrijadanas@ukctuzla.ba Original article Paediatrics Today 2011;7(1)26-36 DOI 10.5457/p2005-114.11