The author assumes that practice became prominent in nursing theory in the first two decades of the 21st century. The end of the last century saw a burgeoning of literature on what is known as grand theories, their implementation, and evaluation. The era of healthcare quality research began when the Institute of Medicine issued a report on building a safer health system. At this time, the 21st-century literature in nursing took a distinct turn toward practice, influencing nursing theory. The

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... ement to individualize care acted to further this influence. The nurse and patient relationship is the source of data for knowledge development. Established research approaches such as grounded theory and new approaches such as story theory were being used to create nursing theory from practice. Grand theory work moved to the development of instruments to measure the effects of theory in practice, such as that of Watson and Roy. The middle-range theories were developed and seen as closer to and easier to use in practice. The evidence-based practice movement also contributed to the role of theory in practice. These knowledge developments led to nurses having expanded roles in nursing.