Özet:

The aim of his research to determine the predictive power of self-concept on perfectionism levels of the middle adolescence period's students. In this study the correlational design was used. Within the scope of the research, self-perception and perfectionism levels of the students were examined in terms of various personal characteristics. To measure children’s self-concept levels, Piers-Harris Children’s Self-concept scale were used. And to measure children's perfectionism levels, the positive and negative perfectionism scale was used. The population of the study is students who are in the mid-adolescence period. In this study randomly cluster sampling method was used. The sample was comprised of 12 schools which are located in Nicaragua. In total, 609 students were included to study. At the end of the study, it was found that the self-perception scores significantly predicted the perfectionism scores, and the self-perception happiness subscale differed significantly between gender groups, and taking support from guidance services variable. In the positive-negative perfectionism subscales, there is no significant differences in demographic variables.

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