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, wherein each usability expert has a particular role in studying the interaction support provided by the computing devices and recording the usability observations in a session log further comprises filtering the usability observations in dependence upon the particular role of each usability expert, including determining whether an observation type of each of the usability observations is authorized for storage in the session log in dependence upon usability expert profiles.