DSM-IV's three-factor model of posttraumatic stress disorder (PTSD) is rarely empirically supported, whereas other four-factor models (King et al., 1998; Simms, Watson, & Doebbeling, 2002) have proven to be better representations of PTSD's latent structure. To date, a clear consensus as to which model provides the best representation of PTSD's underlying dimensions has yet to be reached. The current study investigated whether gender is associated with factor structure differences using the King et al. (1998) model of reexperiencing, avoidance, numbing, and hyperarousal PTSD symptoms. Participants were war-exposed Bosnian secondary/high school boys and girls (N=1572) assessed nearly two years after the 1992-1995 Bosnian conflict. Confirmatory factor analytic tests of measurement invariance across PTSD model parameters revealed many significant sex-linked differences. Implications regarding the potential role of gender as a moderator of the King et al. (1998) model's factor structure are discussed.

BACKGROUND The aim of this research was to examine differences among two groups of girls, models and ballerinas (with risk factors - experimental group) and young students (control group), in body image preception, body mass index, neurotic perfectionism, body - image distortion and simptoms of eating disorders. SUBJECTS AND METHODS The research was conducted with 91 participants divided in two groups, control group - 55 students at University of Sarajevo and experimental group - 13 professional ballerinas, 23 professional models. During this research work we used several measuring instruments: Body mass index; Body Mass Index - Silhouette Matching Test; Neurotic Perfectionism Questioner; Eating Disorders Inventory. RESULTS In this study statistically significant differences occur between these two groups of girls which are related to body - image perception and objective position on the body mass index chart. All 91 participants saw themselves as obese. Statistically significant differences occur in body - image distortion and simptoms of eating disorders in the experimental group, they have high scores on body - image distortion, on eating disorders inventory and neurotic perfectionism simptoms. CONCLUSION Based on th results in this study, we may conclude that there are groups of people who have risk factors for developing some kind of eating disorder, so it would be desirable to create a preventive intervention for young ballerinas and models, but also for those people who coach them, trainers, instructors and managers. For other population groups with risky behavior such as young children, a prevention plan and modifications of cultural influences on people's opinion of body image are extremely important.