Yahoo! Answers has attracted a large number of active users. As of March, 2008, Yahoo! Answers had perhaps 25 million U.S. users and 135 million users world-wide. The U.S. and world-wide users have created 237 million and 500 million answers, respectively. The number of users is currently growing about 35% per year in the U.S. and 85% per year world-wide.[1]
Yahoo! Answers organizes users’ interactions in a “question and answer” (Q&A) format. Q&A is a extremely simple, widely understood communicative form. It’s one of the first forms that kids learn (young kids’ incessant question-asking is a common source of temporary parental insanity). Communicative forms that require relatively little effort to use are relatively attractive to users.
Q&A supports both information-transfer and sociality in communication. In Yahoo! Answers, some top level categories such as “cars & transportation,” “science & mathematics,” and “local business” favor information transfer. See, e.g., “What’s the best way to make your exhaust pipes on your truck as loud as possible?” Much different from such questions are calls for empathy (“Is looking different ok?”), relationship advice, and other, non-factual discussion requests. Q&A is a communicative form with much more general value than just for seeking high-quality knowledge.
User behavior in Yahoo! Answers suggests the importance of immediate, personal user interests. The shares of users that ask questions, answer questions, and vote on the best answer to questions are 70%, 55%, and 24%, respectively.[2] A user’s immediate needs drive a question. Answering a question is a response to an opportunity that arises. Voting on the best answer to a question requires evaluating what others have written about another’s question. Decreasing user activity is associated with less immediate, less personal user interest.
Yahoo! Answers is facing increasing competition for users. Google launched Q&A sites in Russia and China in June and August of 2007, and more countries are expected to be added to the service.[3] Microsoft Live Search QnA, launched in Beta in May, 2006, is being steadily improved. WikiAnswers is a Q&A site that has grown rapidly in the past year, attracting a significant share of Q&A activity. The increasing competition for Yahoo! Answers indicates recognition of the value of Q&A for attracting users and generating user activity.
* * * * *
Notes:
[1] Figures from Matt McGee. I have not been able to find the company source for this data. A Yahoo! Answers blog post for Jan. 10, 2008, states, “Since the U.S. launch in December 2005, Yahoo! Answers has become the largest knowledge-sharing community on the Web with more than 20 million users in the U.S. and more than 90 million worldwide.” McGee’s U.S. data indicate a ratio of answers per user of 7.6 and 9.5 in Aug. 2007 and Mar. 2008, respectively. Data from Gyöngyi et. al. (2008), mainly for early 2006 and English-language, probably U.S. only, has 11.0 answers per user. Data from Adamic et. al. (2008), for one month, apparently in the second half of 2007, given that about 11 million answers were created in the month, English-language, probably U.S. only, has 11.8 answer per user. The number of answers is more obviously defined than the number of users. The McGee user count may include some users who registered but did not engage in any activity.
[2] Gyöngyi et. al. (2008) p. 5, Fig. 4.
[3] Google Answers, which was an attempt to establish a commercial market for information, shut down for lack of success in December, 2006. Q&A as a communicative form was only a small component of that endeavor.
References:
Adamic, Lada A., Jun Zhang, Eytan Bakshy, Mark S. Ackerman, Knowledge Sharing and Yahoo Answers: Everyone Knows Something. WWW 2008 / Refereed Track: Social Networks & Web 2.0 -Analysis of Social Networks & Online Interaction, Beijing, China, 2008.
Gyöngyi, Zoltán, Georgia Koutrika, Jan Pedersen, Hector Garcia-Molina. Questioning Yahoo! Answers. First Workshop on Question Answering on the Web (at the 17th International World Wide Web Conference), Beijing, China, 2008.