This study compares the efficacy of a training session in public speaking (PST) and a training session in focused attention (FAT) in connection with a control group of university students with difficulties in public speaking. In addition, we prepared a method for evaluating public speaking skills. After the intervention, the results of the PST group exceeded those found in the other two groups. The execution in PST and FAT groups improve relative to the control group, the perceived anxiety decreases in all the groups and the attention in public speaking situations changes in PST and FAT groups. Our results indicate that a brief training for university students with difficulties in public speaking can be very effective for daily activities like class presentations or similar tasks (presentation of a balance of results, an informal talk or a summary of a work meeting).