double-blind study

A double-blind study is a type of research design used to eliminate bias in experiments. In this setup, neither the participants nor the researchers know who is receiving the treatment and who is receiving a placebo (a non-active substance). This helps ensure that expectations or beliefs do not influence the results. By keeping both parties unaware, the study provides more reliable data about the effectiveness of a treatment, as it reduces the risk of people's perceptions or behaviors affecting the outcomes. Double-blind studies are commonly used in clinical trials to test new medications or interventions.