Intuition Another set of evaluation metrics is inspired by the resemblance of the USF data structure to the typical output of ad-hoc IR systems (Manning et al., 2008;Pound et al., 2010).
each cue word w c can be thought of as an input query issued against some target concept collection V r , where the goal of our association retrieval system is to rank items from the target collection according to their relevance (i.e., their association strength) to the issued query.