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The experiment examined the regulative function of self distinctiveness in adolescents and tested two hypotheses. One of them was derived from the sociometer model of self-esteem, according to which self- esteem monitors others' reactions and alerts an individual to the possibility of social rejection. It was predicted that exclusion and neutral conditions lead to more negative and less positive emotional reactions than does acceptance. The second hypothesis posits that adolescents with a less distinctive self are more sensitive to evaluation from an interaction partner than are those with high self distinctiveness. The experiment indeed showed that social rejection caused more negative emotions than acceptance and that self distinctiveness might regulate negative emotion in subjects who had been rejected.
XX
In our research we explored the moderating effect of trait-anxiety on improving academic performance during one year. A large sample of 3457 adolescents (1695 girls and 1762 boys) aged from 16 to 17 years took part in the Polish extension in 2009 of the OECD (Organisation for Economic Co-operation and Development) Program for International Student Assessment (PISA) measuring mathematics, reading and science skills. After 12 months they completed the academic performance test once again, and trait and state-anxiety was measured using STAI (State-Trait Anxiety Inventory). Trait-anxiety moderated the change in performance in mathematics but not in science or reading. A high level of trait-anxiety impaired mathematics skills development. Additionally three models for mathematics, reading and science were tested in which state-anxiety predicted 2010 academic performance in these domains.
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