Research stands in a reciprocal relationship to theory construction on the one hand and practice on the other. Theory construction is one of the aims of research, but at the same time, any research approach is also theory-laden. The ultimate aim of both theory and research is to improve control of practical issues, which means improving practice. Thus, research, theory and practice can be said to stand in a triangular relationship in which each construct has an impact on and is influenced by the other two constructs.