Huang, LanMilne, David N.Frank, EibeWitten, Ian H.2012-07-252012-07-252012Huang, L., Milne, D.N., Frank, E. & Witten, I.H. (2012). Learning a concept-based document similarity measure. Journal of American Society for Information Science and Technology, 63(8), 1593-1608 .https://hdl.handle.net/10289/6561Document similarity measures are crucial components of many text-analysis tasks, including information retrieval, document classification, and document clustering. Conventional measures are brittle: They estimate the surface overlap between documents based on the words they mention and ignore deeper semantic connections. We propose a new measure that assesses similarity at both the lexical and semantic levels, and learns from human judgments how to combine them by using machine-learning techniques. Experiments show that the new measure produces values for documents that are more consistent with people's judgments than people are with each other. We also use it to classify and cluster large document sets covering different genres and topics, and find that it improves both classification and clustering performance.application/pdfenThis is a preprint of an article accepted for publication in Journal of the American Society for Information Science and Technology. © 2012 (American Society for Information Science and Technology)content analysistext miningsemantic analysisMachine learningJournal Article10.1002/asi.22689