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The model is one of the most commonly used frameworks that have shaped evidence-based nursing. [2] The model was developed by Dr. Kathleen Stevens at the Academic Center for Evidence-Based Practice located at the University of Texas Health Science Center at San Antonio. [3]
The degree of change as evidenced by change in behaviour, is determined. Ineffective behaviours would be reassessed, and the interventions would be revised. [1] The model had its inception in 1964 when Roy was a graduate student. She was challenged by nursing faculty member Dorothy E. Johnson to develop
It also examines the effectiveness of different types of intervention. The term is used across a range of social and medical practices, including health care, child protection and law enforcement. It is also used in business studies. Within the theory of nursing, intervention theory is included within a larger scope of practice theories.
Theory of Change extends beyond Goals (commonly named Outcomes in Theory of Change terminology) and Objectives to include Impact – the anticipated result of achieving stated goals. Theory of Change is focused not just on generating knowledge about whether a program is effective, but also on explaining what methods it uses to be effective. [3]
While building such models, it must be assumed that the population size in a compartment is differentiable with respect to time and that the epidemic process is deterministic. In other words, the changes in population of a compartment can be calculated using only the history that was used to develop the model. [7]
PICOT formatted questions address the patient population (P), issue of interest or intervention (I), comparison group (C), outcome (O), and time frame (T). Asking questions in this format assists in generating a search that produces the most relevant, quality information related to a topic, while also decreasing the amount of time needed to produce these search results.
The second two levels form a taxonomy in which each intervention is grouped into 27 classes, and each class is grouped into six domains. An intent of this structure is to make it easier for a nurse to select an intervention for the situation, and to use a computer to describe the intervention in terms of standardized labels for classes and domains.
Nursing theory is defined as "a creative and conscientious structuring of ideas that project a tentative, purposeful, and systematic view of phenomena". [1] Through systematic inquiry, whether in nursing research or practice, nurses are able to develop knowledge relevant to improving the care of patients.