Investigation of field - qualitative approach. A mode of research in the social sciences field research is understood as the systematic analysis of problems in reality, in order to either describe them, interpret them, understand their nature and factors constituents, explain its causes and effects, or predict its occurrence, making use of known characteristic of any paradigms or approaches to research methods or in development. Another feature of the field investigation is that interest data are collected directly from reality. This type of modality of research in the social sciences, can be inserted in the qualitative approach, and hence will have an interpretative descriptive perspective that goes in line with the epistemological concept of the constructivist paradigm. In this order of ideas, Perez Serrano (1988) defines qualitative research such as: an active, systematic and rigorous process of directed inquiry, in the which decisions about the searchable, as long as you're in the field subject of study, (p. 46). For its part, Wittrock (1989) proposes that in qualitative research, researchers believe that humans create significant interpretations of the physical and conceptual objects that surround them in their environment and act at a time of such interpretations, which allows thorough study of all the activities of a group of people. A definition provided by Denzin and Lincoln (1994), cited by Rodriguez, Gil and Garcia in 1999, emphasizes that qualitative research is multimetodica on the approach, involves an interpretive, naturalistic approach towards their object of study. This means that qualitative researchers study reality in its natural context, as it happens, trying to interpret phenomena according to the meanings that have for the people involved in the study. For the author of this article defines qualitative research as a process of inquiry through which you try to identify the nature deep realities constructed by the subjects involved in the study, through the description of the complex events that occur in the interaction as natural environment or context of occurrence.