“…The mathematical techniques used in RGA can be used to analyse the structures of learners' concepts in science, and other curriculum subject areas, even though such concepts do not show all the characteristics required of the constructs traditionally employed in RGA. However, there are few studies that apply RGA to the study of concepts commonly found in the sciences (Bezzi, 1996;Fetherstonhaugh, 1994;Winer & Vazquez-Abad, 1995). However, its main use in educational research to date has been in studying the perceptions held by educators of their work, the children in their care or themselves 'in role'; and/of their students of them, their environment and the material they must learn (Artiles & Trent, 1990;Cuniliffe, 1994;Derry & Potts, 1998;Fang, 1996;Kubrusly, 1984;Menmuir & Christie, 1999;Munby, 1984;Nespor, 1985;Owens, 1988;Shaw, 1992;Solas, 1992;Tisher, 1983;Walker & Kleine, 1985;Watson, 1994;Williams, Pack, & Khisty, 1997)…”