摘要:The purpose of present study was to predict internet dependency by sensation seeking, big five personality factors and gender. Hence, sample of 179 undergraduate students (109 female and 70 male) were selected from University of Tehran using cluster sampling. The instruments consisted of the IAT, SSS-V and NEO-PI-R. Results revealed a positive significant relation (P<0.01) between internet dependency with overall sensation seeking and sub scales of disinhibition and boredom susceptibility; a negative significant relation (P<0.05) was also found between internet dependency with agreeableness and conscientiousness. Enter method of multiple regression analysis, with the presence of all predictor variables (sensation seeking and its four subscales, big five personality factors and gender) indicated 24 percent of changes in internet dependency.