Factor Structure of the Internet Addiction Test in Online Gamers and Poker Players (2015)

2015 Apr 22;2(2):e12. doi: 10.2196/mental.3805.

Khazaal Y1, Achab S1, Billieux J2, Thorens G1, Zullino D1, Dufour M3, Rothen S1.



The Internet Addiction Test (IAT) is the most widely used questionnaire to screen for problematic Internet use. Nevertheless, its factorial structure is still debated, which complicates comparisons among existing studies. Most previous studies were performed with students or community samples despite the probability of there being more problematic Internet use among users of specific applications, such as online gaming or gambling.


To assess the factorial structure of a modified version of the IAT that addresses specific applications, such as video games and online poker.


Two adult samples-one sample of Internet gamers (n=920) and one sample of online poker players (n=214)-were recruited and completed an online version of the modified IAT. Both samples were split into two subsamples. Two principal component analyses (PCAs) followed by two confirmatory factor analyses (CFAs) were run separately.


The results of principal component analysis indicated that a one-factor model fit the data well across both samples. In consideration of the weakness of some IAT items, a 17-item modified version of the IAT was proposed.


This study assessed, for the first time, the factorial structure of a modified version of an Internet-administered IAT on a sample of Internet gamers and a sample of online poker players. The scale seems appropriate for the assessment of such online behaviors. Further studies on the modified 17-item IAT version are needed.


Internet Addiction Test (IAT); Internet addiction; World of Warcraft; factorial structure; massively multiplayer online role playing; poker players; validation