This article is a preliminary result of the research Aggressiveness in children. A perspective from dynamic psychology, the family and the critical pedagogy, funded by the Fundacion Universitaria Luis Amigo in 2010. This research links the research areas: Family, development and quality of life, social psychology and mental health and education and pedagogy. Its purpose is to report some results of the first phase of the investigation, which is expected to perform a comprehensive literature review to allow an epistemological approach to the phenomenon that the crew wishes to understand: the aggressiveness in children between 5 and 7 years. This text will focus on three aspects of the study: the conceptual delimitation of dynamic psychology, an epistemological approach to this theoretical psychology approach and some comments about the current status of research from this branch of psychology. It was found that the found bibliographical sources address two fundamental concepts: relational psychoanalysis and psychoanalytic psychotherapy in order to describe what are known in the academic field of Medellin as dynamic psychology. In addition, it was found that the relational paradigm in psychoanalysis uses theoretical conceptions consistent with the externalist anthropology and constructivist epistemology approaches, also with theoretical models related to complex thought. It was also verified that the research in relational psychoanalysis now abound, in general, two major themes: child development in its relational aspects and the relational conception in the clinical praxis. The methodological design of these investigations vary: the use of projective assessment techniques, such as the Test of Rorschach and Pata Negra, some quantitative tools, the clinical interview, case study, records and analysis of psychotherapy sessions with a focus in extratransference and within sessions phenomena. It was found, like a new, a high prevalence of oral material hermeneutic analysis, and the use of discourse analysis techniques very close to linguistics. Finally, there is a frequent use, increasing today, of David Liberman Algorithm (DLA), like a tool for oral material analysis. © Revista Colombiana de Ciencias Sociales.