What else is there? Search diversity examined

This paper describes a study on diversity in image search results. One of the first test collections explicitly built to study diversity - the ImageCLEFPhoto 2008 collection - was used in an evaluation exercise in the summer of 2008. Analyzing 200 of the runs submitted by 24 research groups enabled the relationship between precision and result diversity to be studied. In addition, the level of diversity present in search results produced by retrieval systems built without explicit support for diversity was computed. The remaining potential to improve on diversity was calculated and finally, a significant preference by users for divers search results was shown. © Springer-Verlag Berlin Heidelberg 2009.