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Related to middle-range theory: grand theory
A theory comprising limited numbers of variables, each of limited scope. Middle-range theories may be descriptive, explanatory (specifying relationships between two or more concepts), or predictive (envisioning relationships between concepts or effects of certain concepts on others). Examples include the Health Belief Model, the Theory of Maternal Attachment, the Erikson Theory of Psychosocial Development, Watson's Theory of Human Caring, and the Maslow Hierarchy of Needs Theory. Middle-range theories are made up of a limited number of concepts and propositions that are written at a relatively concrete and specific level. Middle-range theories are generated or tested by means of research, and are used as the evidence for practice activities, such as assessment and intervention.
See also: theory