Description: Studies of users and their use of information are a library and information science basic line of research and are undertaken for a variety of different purposes. In the main, they help to inform us about the effectiveness and efficiency of library services, the achievement of their goals regarding users, and the level of user satisfaction with services, all of which provide indicators in quality assessment processes. In Spain, research on university library users has been encouraged through the National University Quality Assessment Plan (Ciudad Universitaria, 1999). A great number of Spanish university libraries have been assessed and one of the elements used for this purpose has been the surveying of students and faculty, such as that carried out by the Spanish Universities Council (Consejo de Universidades, 2002). In Mexico, assessment processes are still on the waiting list and furthermore, so is any knowledge of how information is used by university students. From the information literacy (IL) point of view, user studies help to design programmes for users that acknowledge users’ existing deficiencies and expertise. That is to say, it is necessary to carry out an assessment of their existing skills and difficulties, and from that to design learning activities (Manchester Metropolitan University Library/Leeds University Library, 2002). In the university world, user studies attempt to show levels of awareness of library services, the nature of their use, the information access skills of students and university staff, in order to identify the skills and deficiencies which will ultimately affect future academic performance. The purpose, for the most part, is to propose measures by which the university library can help make students information literate – which includes the acquisition of wider knowledge literacies – and which in turn facilitates new, improved teaching and learning outcomes among the university community.