Placebo-controlled study
Placebo-controlled study
A Placebo-controlled study (pronunciation: /pləˈsiboʊ kənˈtroʊld ˈstʌdi/) is a type of clinical trial in which the effects of a new treatment or drug are compared with the effects of a placebo.
Etymology
The term "placebo-controlled study" is derived from the Latin word "placebo", meaning "I shall please", and the English word "controlled study", which refers to a study in which one group is controlled for comparison with another group.
Definition
In a placebo-controlled study, participants are divided into two groups. One group receives the treatment or drug being studied, while the other group receives a placebo. The placebo is a substance that looks like the treatment or drug being studied, but does not have any therapeutic effect. The purpose of using a placebo is to eliminate any bias that might be introduced if people know they are receiving a treatment.
Related Terms
- Double-blind study: A type of placebo-controlled study in which neither the participants nor the researchers know who is receiving the treatment and who is receiving the placebo.
- Randomized controlled trial: A type of study in which participants are randomly assigned to either the treatment group or the placebo group.
- Clinical trial: A research study in which new treatments or drugs are tested in people.
- Bias: A tendency to favor one group or result over another for reasons that are not related to the study's design or data.
See Also
External links
- Medical encyclopedia article on Placebo-controlled study
- Wikipedia's article - Placebo-controlled study
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