Purpose: This descriptive correlational study was designed to examine the relationship of perfectionism to anger thought and problem behaviors. In addition, the mediating effect of anger thought in relation to perfectionism and problem behaviors was investigated. Methods: Data were collected from 807 students in a girls' high school, and descriptive statistics, t-test, ANOVA, and hierachical multiple regression were used with SPSS/PC 18.0 program to analyze the data. Results: There were

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... ant differences in anger thought (primary and secondary angerthought) and problem behaviors between the upper 25% and lower 25% group for perfectionism. Primary and secondary anger-thought had a significant mediating effect in relation to perfectionism and problem behaviors. Conclusion: For effective management and prevention of adolescent women's problem behaviors, programs including perfectionism and anger thought should be developed. Further research is necessary in order to draw a consensus on cognitive factors as mediators between the related factors of problem behaviors.