KMAN Publication Inc. (KMANPUB) Journal of Adolescent and Youth Psychological Studies (JAYPS) 2981-2526 4 Serial Number 15 2023 09 01 Structural Relationships between brain- behavior systems and Cloninger Temperament and Character model with Tetrad dark sides of personality Structural Relationships between brain- behavior systems and Cloninger Temperament and Character model with Tetrad dark sides of personality 79 88 10.61838/kman.jayps.4.9.9 EN Journal Article Background and Aim: It seems that one of the important factors affecting the dark dimensions of personality is brain-behavioral systems and dimensions of temperament and character, so the purpose of the present study is the relationship between brain-behavioral systems and temperament and character with dark dimensions of personality in students. Methods: The design of this research was a correlation method in terms of applied purpose and in terms of controlling variables. The statistical population of the study was all male and female students of national, free and non-profit universities of Tabriz in the academic year 2021. From this population, 450 people were selected by cluster random sampling and studied. The questionnaire of dark personality traits, brain-behavioral systems and temperament was used to collect data. Data has been analyzed using Pearson correlation coefficient and structural equation methods. Results: The results showed that there is a positive and significant relationship between behavioral activation system and dark dimensions of personality. There is also a significant negative relationship between behavioral deterrence system and war and escape with the dark dimensions of personality. On the other hand, innovation, self-avoidance, reward of dependence and self-escape with the dark dimensions of personality have a positive relationship and there is a negative and significant relationship between perseverance, self-direction and cooperation with the dark dimensions of personality. On the other hand, the results of path analysis showed that the variables of behavioral activation system and behavioral inhibition play a mediating role between temperament and character with dark personality traits. Conclusion: The results of this research show that paying attention to the variables of behavioral brain systems and temperament and character play an important role in the dark dimensions of personality.

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