The paper discuss the application of qualitative and quantitative techniques in political studies.It describes the classical proposal of Johan Galtung, known as trilateral science, which invites to the permanent contrast to confirm, validate and accept facts and ideas; then it explores Grounded Theory as a mechanism to achieve and explore data in order to identify a possible dialogue with experimental methodology.Finally, it shows social capital as a case study to demonstrate the relevance of multi-methodological applications.