This article presents data concerning an intervention in a group focusing on psychological maturity and strategies for coping with stressful life events. The sample consisted of 32 students at the School of Health and Welfare Professions of the Technological Educational Institute (TEI) of Patras. The aim of the study was to investigate the relationship between psychological maturity and coping strategies in the life of undergraduate students. In addition, the study investigates the degree to which an intervention may influence the psychological maturity of the participating subjects and their consequent coping strategies. Assessment was based on a combination of qualitative and quantitative measures. The results of the study show that the intervention ameliorated the psychological maturity level of the experimental group. The individuals under investigation used a variety of coping strategies, an attitude that is probably more functional, given that the character of coping can change according to circumstances. It appears that the participants learned through experience and that the support offered by the group is one of the most important and functional coping strategies.