Jingjing Liu, Chang Liu, Michael J. Cole, Nicholas J. Belkin, Xiangmin Zhang. Exploring and predicting search task difficulty. In Xue-wen Chen, Guy Lebanon, Haixun Wang, Mohammed J. Zaki, editors, 21st ACM International Conference on Information and Knowledge Management, CIKM'12, Maui, HI, USA, October 29 - November 02, 2012. pages 1313-1322, ACM, 2012. [doi]
Abstract is missing.