One of human needs is to interact with people around him/her. Social interaction is a dynamic relationship to build social relationships. Adolescence is a developmental transition into adulthood, involving biological, cognitive and social changes. The impetus to build affiliation also appears in adolescents because as social beings they have a wide range of needs that must be met. The popular means of communication among adolescents that can be used to interact is the means of communication

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... g social network. The objective of this study was to find out the effect of social network on the need for adolescence affiliation at Psychology Study Program of Medical Faculty, Lambung Mangkurat University. This study was a quantitative study with a sample of 90 adolescents aged 18-21 years old, the students of Psychology Study Program, Medical Faculty, Lambung Mangkurat University. The sampling technique was random sampling. The independent variable in this study was the Social Network, while the dependent variable was the Need of Affiliation. Data were analyzed using a polynominal regression with the results of r xy = 0.534, p > 0.05 indicating that there was no effect of social network on the need for adolescence affiliation at Psychology Study Program of Medical Faculty, Lambung Mangkurat University. It is suggested that adolescents should use social network in a right and wise way so as to bring positive effects on their personal development.