INTRODUCTION: Internet addiction refers to the excessive use of the internet that causes mental,
social, and physical problems. According to the high prevalence of internet addiction among university
students, this study aimed to determine the effect of an educational intervention on preventive
behaviors of internet addiction among Tehran University of Medical Sciences students.
MATERIALS AND METHODS: This study was a quasi‑experimental study conducted among female
college students who live in the dormitories of Tehran University of Medical Sciences. Two‑stage
cluster sampling was used for selection of eighty participants in each study groups; data were
collected using “Young’s Internet Addiction” and unstructured questionnaire. Validity and reliability
of unstructured questionnaire were evaluated by expert panel and were reported as Cronbach’s
alpha. Information of study groups before and 4 months after the intervention was compared using
statistical methods by SPSS 16.
RESULTS: After the intervention, the mean scores of internet addiction, perceived barriers
construct, and the prevalence of internet addiction significantly decreased in the intervention group
than that in the control group and the mean scores of knowledge and Health Belief Model (HBM)
constructs (susceptibility, severity, benefits, self‑efficacy) significantly increased.
CONCLUSIONS: Education based on the HBM was effective on the reduction and prevention of
internet addiction among female college students, and educational interventions in this field are
highly recommended.


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