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Effects of Introverted and Extroverted Personalities on Consumptive Behavior in Students of The Private High School of Muhammadiyah in Medan

The objective of this study is to analyze the effects of extroverted and introverted personalities on consumptive behavior in students of the Private High School of Muhammadiyah in Medan. This type of research is a quantitative study using a correlational approach. The population in this study consisted of 198 female students and 132 of this population were sampled by screening which consisted of 66 introverted students and 66 extroverted students. The data collection technique is to use a personality scale and a scale of consumptive behavior. The data analysis technique is using multiple regression analysis with a significance level of = 0.05.The results of data analysis in this study indicate that there is an effect of introverted personality on consumptive behavior with a value of p = 0,000, correlation coefficient of rx1y = 0.765, and determination of r2 = 0.585 (58.5%).There is an effect of extroverted personality on consumptive behavior with a value of p = 0,000, correlation coefficient rx2y = 0.825, and determination r2 = 0.680 (68%). There is an influence of introverted and extroverted personalities with consumptive behavior in adolescents in Muhammadiyah High School Medan, with a correlation coeffisient (rx1x2y) of 0.893 with p-value = 0.000, with the determination r2 of 0.797 (79,7%). The conclusion in this study is that effects of introverted and extroverted personalities on consumptive behavior.It is recommended to students to control consumptive behavior by adopting thrifty lifestyles, and also to suppress consumptive behavior by doing things that are more beneficial in their environment, for example by saving.