A middle-range theory contains fewer concepts and propositions than a grand theory, but they both align with nursing practise and guide research. Conceptual models direct the development of propositions and empirically testable hypotheses used to develop or refine middle-range theories. The transition from conceptual model to middle-range theory can be identified by reviewing King’s theory of goal attainment (middle-range theory), which is derived from King’s conceptual system (conceptual model).

Select a conceptual model and a middle-range theory.

1) Explain how the concepts of the conceptual model and middle-range theory are consistent and linked.