Internet and social network site characteristics.

aChi-squared test; b independent t-test; c U Mann-Whitney test.*pSNG: lifetime number of social network groups; SNTW: number of social network contacts contacted at least once over two weeks; SNN: social network number or lifetime total number of friends; G-ESNS: expected knowledge of SNS terms according to generation; SNS terms: familiarity with social network site terms; Correct SNS: number of correct answers in the social network site term test; Number of SNS: lifetime number of social network sites used; Frequency of use of SNS: frequency of use of social network sites; FBN: Facebook number of friends; Close contacts on Facebook: close contacts added to Facebook; Acquaintances on Facebook: people seen once added to Facebook; Virtual friendships: people never seen offline but added to Facebook; Frequency of use of Facebook: frequency of activities on Facebook;Frequency of Internet use: frequency of use of the Internet; G-EFI: expected frequency of Internet use according to generation; Digital devices: number of technological devices.