The social networks increasingly become the arena of our lives and involve different aspects of our social presence from day to day and this requires people to play some social roles in these media as such as what they do in real life. The attitudes, perceptions, behaviors and actions people do in these platforms, shape ̳Social Identity in Social Media‘ which in regard with increase in importance of these media, this construct becomes more critical to be studied and to understand. The paper pays academic attention to the subject by focus on regional cultural differences of facebook users as most pervasive social networks. Using a framework consist of three dimension, Iranian users studied in case of variables which construct social identity, consist of Full Name exposure, benefit from Fake Profiles and level of privacy setting. These variables selected in regard with special characteristics extracted from observation of sample size behaviors during a period of two months, and believed that may reflect a new trait in social identity users may present depend on the cultural and domestic concerns. By sending a lot of request to participate in the online survey, a sample of 308 users agree to include in the online survey. The descriptive statistics felt sufficient for the purpose of study. Findings show that nearly half of Iranian users of facebook not provide their Full name, and make some distortions or using abbreviations make it difficult to find for others. Also nearly 40% of them benefit from fake profile(s) in addition to their main account to surf facebook and share the contents they not prefer to be known for them, such as satire or taboo articles. Also many of them restricted the level of access to their profiles to make the social media as a ̳private social space‘. The authors concluded that social identity joins with the real identity of the users, and thus they care about their social image in the social media space. Many users believe that despite the freedom for joy from the contents in social media, they will damage for some descent in prestige and image against the others which attend to their profiles, likes and shared articles. Thus they use some policies to joy from social media without being hurt or damaged by the activities in it. They try to make themselves hide and merely invite confident friends to join with, make restrictions to access of others to their shared articles and comments, and benefit from anonymous surfing with fake profiles. The findings of this research despite the simple method used is to attract attentions to the interdependency of identity in real life and in social media space and the effect of real life identity on the image, users tend to present in social media.
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