The first goal of this study was to obtain, Child Behavior Checklist (CBCL) and Youth Self-Report (YSR) problem-scales data for youths in Croatia, and compare them to the original American sample. The second goal of this study was to compare boys -girls problem scales data and CBCL-YSR differences. The instruments were administered to school adolescents aged between 12–18 comprising a non-referred sample (n=611) drawn from the whole country. Youths, compared to their parents, rated higher scores in all scales in both sexes (p<0.001). According to parents’ reports boys had higher scores in more scales (five out of eleven). According to adolescents’ self-reports girls had higher scores in more scales (seven out of eleven). Consistent with other studies, Croatian sample confirmed a larger number of serious behavioral and emotional problems reported by adolescents. Adolescents were confirmed as the most reliable informants on their problems
