Abstract: The present inventor devised, among other things, information retrieval systems, methods, software, and related interfaces that help users assess and if necessary bolster the quality of their manual selections from search results. One exemplary system receives a set of documents selected from search results for an input query, identifies key subjects in the selected documents, and outputs a graphic, such as a pie chart, that shows not only how well these selected documents relate to the query, but also whether there are gaps in the topical scope of the selected documents related to the input query.