The UPC diagnostic test (see DT) has been administered at the Mathematics and Statistics School (September 2007 and 2008) and at the Civil Engineering School (2008). There are indications that suggest a high predictive power, in the sense that scores higher than 60% succeed in the first year, which has selective character, and that scores less than 50% fail. A case study has been undertaken by M. R. Estela, F. Massanés and S. Xambó to find robust evidence for this hypothesis, or otherwise.