The primary purpose of a pilot study is to assess the feasibility and effectiveness of a research project before the main study is conducted. It helps identify potential problems, refine research methods, and estimate required resources. By testing procedures on a smaller scale, researchers can gather preliminary data that informs the design of the larger study. This approach minimizes risks and enhances the reliability of results. Pilot studies are particularly useful in clinical trials and social science research, ensuring that the main research project can achieve its objectives effectively.