The factors that influenced the development of the model included: family, education, religious background, mentors, and clinical experience. Roy's model asks the questions:
Who is the focus of nursing care?
What is the target of nursing care?
When is nursing care indicated?
Roy explained that adaptation occurs when people respond positively to environmental changes, and it is the process and outcome of individuals and groups who use conscious awareness, self-reflection, and choice to create human and environmental integration.