Research theory serves as a structured framework that guides the investigation of phenomena. It is built on existing knowledge, observation, and logical reasoning, providing a foundation for understanding, explaining, and predicting outcomes. This theory is essential for conducting rigorous, reliable, and valid research across various fields, including social sciences, natural sciences, and humanities.

A core function of research theory is to establish a methodological framework that dictates how data is collected, analyzed, and interpreted. It defines key concepts, proposes relationships between them, and suggests how these relationships work. Different types of theories, such as descriptive, explanatory, and predictive, serve distinct purposes in the research process. Descriptive theories outline what is happening, explanatory theories explain why, and predictive theories forecast future outcomes based on established relationships.