This document discusses frameworks and theoretical concepts in nursing research. It defines key terms like framework, concept, construct, theory, and variables. A framework provides structure and guidance for a study. Quantitative research usually has an explicit framework while qualitative research may not. The document reviews different types of theories from grand theories, which are highly abstract, to middle range theories which are more specific. It also discusses how to evaluate existing theories and develop new research frameworks by identifying relevant theories, synthesizing from research, or proposing based on clinical experience.