Various studies, including retrieving the accumulated question-answer pairs to find the related answer for a new question, finding the expert in a specific domain, summarizing single or multiple answers to provide a concise result, are conducted in the Community QA sites (Jeon et al., 2005;Adamic et al., 2008;Liu et al., 2008;Song et al., 2008;Si et al., 2010a;Figueroa and Atkinson, 2011).
an important issue which has been neglected so far is the detection of deceptive answers.