Objective(s): To examine the problem of internet addiction within the perspective of consumers· personality, behavior and demographic characteristics. Methods: This cross-sectional study was performed using 3 questionnaires, including Youngchr('39')s scale to measure the degree of tendency towards internet addiction and Mayerchr('39')s - Briggs Type indicator (MBTI)• which has four dimensions for personality- and Deanchr('39')s Alienation Scales (DAS) to measure alienation. There were a total

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... 732 respondents, aged 15 to 39 years. Responses were analyzed using factor analysis, analysis of variance, and multiple regression techniques. Results: Thirty percent of the respondents were addicted to the internet and showed various degrees of alienation, a sense of being powerless, isolated, introverted or excessively emotional. Conclusion: It is essential to organize educational programs and counseling services to decrease internet addiction within Iranian families.