The Problem of the Invisible in Education
The paper presents a theoretical perspective based on the assumption that we deal with the “problem of the invisible” in education. Modern medicine would be impossible without the invention of microscope that made previously invisible class of organisms visible. The authors assume that in educational research we are able neither to detect a certain kind of phenomena nor measure it, the phenomenon being the relations among the participants of the educational process. The structure of relations may dramatically affect the impact of various educational interventions, which on average may produce low or contradictory effect sizes. Human relations may be the ultimate hidden variable of the education research.