Greg Dunn Jurgen Wiersema Jaap Ham Lora Aroyo Evaluating Interface Variants on Personality Acquisition for Recommender Systems. 259-270 2009 UMAP http://dx.doi.org/10.1007/978-3-642-02247-0_25 conf/um/2009 db/conf/um/umap2009.html#DunnWHA09