... causing the rise in question-query usage?Irrespective of the cause, given that there is anincreased use of Q-queries in spite of the seem-ingly inferior search results, there is a strong need for ... behavior in query for- mulation. In particular, this upward trend couldbe due to changes in the kind of information usersare now seeking from the Web, e.g., as a result of growing popularity of Q&A ... types of information, althoughit is possible that the rise of Q&A sites and usersentrusting search engines with more complex infor-mation needs could have indirect in uences. (b) The results...