Grounded theory. Development of a methodology

Grounded theory is a procedure based on empirical data, elaborated to create meso theories generated through systematic methodological steps from the data. In his study the author present this cognitive and methodological approach which is little known in Hungary and is generally used in qualitative research. He also covers the historical changes and development trends of this methodology, which is of particular significance not only as providing information on the history of science but also because it sheds light on the differing paradigms of scientific investigation.