Dembitskyi S. Theoretical validation in sociological research: methodology and methods

The dissertation reveals the essence of different types of validity. Also it describes the author's conception of theoretical validity and the related data's biases in sociological research. Special attention is dedicated to the notions of "concept" and "construct", to the role of theoretical validity in the integration of qualitative and quantitative approaches in the sociological research, to different levels of theoretical validation and to the longitudinal research design. Besides, the principles of theoretical validation have been formulated, the research strategies of theoretical validation have been considered and tested, particularly - concept mapping, grounded theory and case study.