Roy's Adaptation Model is a nursing theory developed by Sister Callista Roy in the 1970s. It focuses on how individuals adapt to changes in their environment, emphasizing the importance of promoting health and well-being. The model identifies four adaptive modes: physiological, self-concept, role function, and interdependence, which help nurses assess patients' needs and responses to stressors. The model encourages nurses to view patients holistically, considering both physical and emotional aspects of health. By understanding how patients adapt, nurses can create tailored interventions that support their coping mechanisms and enhance their overall quality of life.