Grand or middle-range nursing theories. Select one of the grand or middle-range nursing theories. How does the theory demonstrate evidence of the utilization of social, behavioral, or bioscience theories? Also read: Select one of the grand or middle-range nursing theories. Choose a middle-range theory or grand theory that, in your opinion, can be applied to research. What are the assumptions underpinning this theory? Orem, Mid-range & Grand Theories describe, evaluate and discuss application of a nursing grand or mid-range theory. Describe, evaluate and discuss application of a nursing grand or mid-range theory. Discuss how a specific middle-range nursing theory has been or could b Middle range nursing theory that is a borrowed theory and applies to CAUTI Middle range nursing theory that is a borrowed theory and applies to CAUTI