Media analysts are challenged to acquire selections of documents that are representative of their topics of interest. Conventional search and selection processes are often constrained because of an inability to efficiently filter large amounts of potentially relevant documents and thus pose the risk of introducing bias. We describe a computer-assisted approach to increase the probability of identifying all articles relevant to a topic (in this case, marijuana), and provide an evaluation of its effectiveness in reducing bias while minimizing time expenditure. Using our system, we filtered 23,755 articles in 24.4 h. Relative to conventional processes, a substantial reduction in bias was achieved. Our system significantly reduced the risk of bias while retaining efficiency and accuracy in document selection. [ABSTRACT FROM AUTHOR]