Gamito, Pedro S.Morais, Diogo G.Oliveira, Jorge G.Brito, RodrigoRosa, Pedro J.Matos, Margarida Gaspar de2016-04-292016-04-292016Computers in Human Behavior, 58, 471-478. doi:10.1016/j.chb.2016.01.0130747-5632http://hdl.handle.net/10400.12/4604This paper reports an exploratory analysis of the relation between Internet addiction and patterns of use among Portuguese adolescents (n ¼ 2617) from the WHO 2010 Health Behavior in School-aged children study, with a short version of Young's Internet Addiction Test (the brief Internet Addiction Questionnaire e bIAQ) and self-reports on online behaviors and access. Two-Step Cluster analysis identified two clusters of users based on their usage pattern: a minority of high-frequency users, with higher bIAQ scores, and a majority of low-frequency users, with lower bIAQ scores. Low and high-frequency users are particularly distinct in specific activities, which converges with previous research showing addiction to specific Internet activities rather than to the Internet as a whole.engAdolescentsInternet addictionInternet usejournal article10.1016/j.chb.2016.01.013