When you implement social networking within a company, you can expect varying levels of participation from employees. Some will immediately start contributing content through blogs, wikis, and comments. These users are generally referred to as creators or contributors. Others will prefer to just read content created by others. These users become spectators. You will also have those employees who never use social networking at all and are considered inactive.
Forrester has defined six levels of participation that include Creators, Critics, Collectors, Joiners, Spectators and Inactives. Furthermore, Forrester has created a Social Technology Profile Tool. You can use to find out approximately how many people fall into each level of participation, based on the age group, country and gender you specify.