what type of content writing is this?
Check if the candidate has previous experience in content writing in the required subject.
Check required experience versus held experience. if you can get more inputs from your existing content writers on the type of project they are working on, you can check if the candidate has relevant similar experience.
Hope this helps. Do keep me posted.
22nd October 2012 From India, Madras
Thanks and regards
7th April 2013 From India, Chandigarh