A blind test, also known as a blind trial or blind study, is a scientific or market research method in which the participants are unaware of certain key information, such as the identity of the product being tested or the purpose of the study. This is done to eliminate bias and ensure objective results. In a blind test, the participants are typically given samples or information without any identifying labels or branding, allowing them to evaluate the product or information solely based on its quality or effectiveness. Blind tests are commonly used in fields such as medicine, psychology, and consumer research to gather unbiased data and make informed decisions.