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Kim and Oh looked at the comments given by users on choosing best answers and showed that content completeness, solution feasibility and personal agreement/confirmation were the most significant criteria.

*Names have been changed to protect identities En español She wrote him first. In the summer, when the trees leafed out, you couldn't even see the road or the neighbors. She'd grown up here, in a conservative pocket of Virginia. When it came to meeting new people, however, her choices were limited. The holidays were coming, and she didn't want to face them alone.There are also levels (with point thresholds), which give more site access.Points and levels have no real world value, cannot be traded, and serve only to indicate how active a user has been on the site.Studies of user typology on the site have revealed that some users answer from personal knowledge – "specialists" – while others use external sources to construct answers – "synthesists", with synthesists tending to accumulate more reward points. looked at the ego networks of users and showed that it is possible to distinguish "answer people" from "discussion people" with the former found in specialist categories for factual information, such as mathematics and the latter more common in general interest categories, such as marriage and wrestling.They also show that answer length is a good predictor of "best answer" choice.