Method and apparatus for measuring and influencing article selection in a social network are disclosed. A learning-and-guiding module tracks access to articles by users of the social network and determines patterns of users' attraction to articles based on contents of articles and attributes of users. The module utilizes learnt user-articles characteristics to influence article selection through communicating with users through the social network. The module relies on historical usage data characterizing user's affinity to articles. To guard against usage data obsolescence due to shifting interests, usage data are frequently adjusted to place more emphasis on recent usage patterns.