Five research questions were investigated in the study of tagging:

• How strongly does personal tendency affect personal tagging behavior?  Our data show a strong effect from personal tendency.
• How strongly does community influence affect personal tagging behavior.  Our data show that the tags a person has seen from the community also strongly influence future tagging, though less strongly than personal tendency.
• How does the tag selection algorithm influence the evolution of the community's vocabulary?  Our data show significant differences among the experimental groups in tagging behavior, though it is hard to know for certain that the tag selection algorithm is the cause of the difference in behavior, given the strong effects of personal and community tendencies.
• How does the tag selection algorithm affect users' satisfaction with the system?  Our data show strong differences in satisfaction with the different algorithms, though the differences in overall satisfaction are less strong.
• Are different tag classes more or less well-suited to various user tasks?  Our data show that users definitely prefer factual tags for learning about movies, subjective tags for choosing movies, and personal tags for categorizing movies.

Title	Authors	Appears In	Publication Date	Date added
tagging, communities, vocabulary, evolution	Sen, S., et al.,	Proceedings of CSCW 06	2006	07.13.06