What does a human test subject do?

Human test subjects take part in an experiment or clinical trial to help researchers and scientists measure the effectiveness of a product or to test ideas and collect information for a scientific study. Your duties as a test subject depend on the type of tests that researchers perform. In a drug trial or mental health study, you take medication or undergo experimental treatment while researchers monitor your progress and measure the results. Other researchers gather human test subjects to conduct studies on marketing and consumer behavior. NASA uses test subjects to investigate the effectiveness of equipment or perform ground-based research.