The association between interpersonal relationships, perceived social support, and depressive symptoms in adolescents was investigated in the present study. The Center for Epidemiologic Studies Depressive Symptoms Scale (CES-D-SF), Multidimensional Scale of Perceived Social Support (MSPSS), and Interpersonal Relationship Scale (IRS) were administered to 1,573 high school students. There were four main findings: all three types of interpersonal relationships (same-sex peer, opposite-sex peer, and teacher-student relationship) and perceived social support had direct effects on depressive symptoms; perceived social support was a mediator in the relationship between interpersonal relationships and depressive symptoms; gender differences were present in the relationship between interpersonal relationships and depressive symptoms; and the three types of interpersonal relationships exerted different effects on depressive symptoms between adolescent boys and girls.Same-sex relationships exerted the strongest effect on depressive symptoms among girls, whereas teacher-student relationships exerted the strongest effect among boys.
Although the negative effects of overconfidence are more likely to be mentioned in the literature, some researchers have argued that the benefits of overconfidence may outweigh its costs. We attempted to explore the positive effects of overconfidence in competitive situations. We had participants compete against fake opponents who were overconfident and then measured their competitive performance in two studies. In Study 1 we examined the effects of overconfidence on competitive performance in a competitive situation and the possible mechanism for this overconfidence. In Study 2 we investigated the characteristics of the performance in a competition after a mismatch between the level of confidence and the fake opponent's actual competence was revealed. Our results indicated that overconfident individuals tend to be perceived as more competent and more likely to benefit in the process of competition. Even after a mismatch between the level of confidence and the real competence was revealed, the overconfident individuals were not punished in that they made as much money as the less overconfident and still got higher competence ratings. Together those studies suggested that overconfidence has its advantages in competitive situations.
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