September 15, 2018 (Vol. 38, No. 16)
Strong Points: Large question repository, active community
Weak Points: None
With a format that will be familiar to anyone who spends his/her time on discussion forums or reddit, Cross Validated is a straightforward question-and-answer site that is likely to prove useful to researchers interested in statistics, data analysis and visualization, data mining, or machine learning. Users on Cross Validated ask questions, answer other people’s questions, and “upvote” useful answers to increase their visibility on the site. Any casual visitor to the site can view the question-and-answer threads; however, to ask a question or to contribute a response, visitors must register with the site. On the website’s homepage, users can browse the question board by newest, most frequent, most votes, most active, or unanswered questions. Individual questions can also be tagged with keywords that can then be used as search terms to find the relevant queries.