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    Glossary Placebo-Controlled

    comparison involves an inactive substance to test treatment efficacy

    A placebo-controlled study is a type of clinical trial where one group of participants receives the experimental treatment, while another group receives a placebo—a substance with no therapeutic effect, often a sugar pill. This design helps researchers determine the actual effectiveness of the treatment by comparing outcomes between the treated group and the placebo group, thereby accounting for the placebo effect, where participants may experience perceived or actual improvements in their condition simply because they believe they are receiving treatment.

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