The SIGIR Test of Time Award recognizes research that has had long-lasting influence, including impact on a subarea of information retrieval research, across subareas of information retrieval research, and outside of the information retrieval research community (e.g. non-information retrieval research or industry). The winning paper is selected from the set of full papers presented at the main SIGIR conference 10-12 years before. The SIGIR 2015 award will be selected from the set of full papers presented at SIGIR 2003, 2004, and 2005. The committee will select a subset of the candidates to evaluate for the award. Of the qualifying papers, the top 5 papers from the SIGIR main conference ranked by citation according to the ACM Digital Library will automatically be nominated for consideration. In addition, we encourage nominations from the community of papers not automatically selected. See the nominations page for further details.