1. A method of creating a session log for studying usability of one or more computing devices used for social networking, the method comprising: receiving, by a usability engine from at least one usability expert, usability observations observed by the usability expert during a usability session for studying interaction support provided by one or more computing devices to a plurality of users interacting within a social network through the computing devices; recording, by the usability engine, the usability observations in a session log; detecting, by an event listener on at least one of the computing devices, an event generated by the computing device as a result of an interaction among the plurality of users within the social network; notifying, by the event listener, the usability engine of the event; and recording, by the usability engine, a description of the event in the session log.