Article from "The New York Times Magazine" presents an experiment in which patients received a placebo surgery for arthritis.

Alternative-medicine article explains what a double-blind study is and how a placebo is used in it.

Article covers a study that shows that half of the improvement in antidepressant-medication users was due to the placebo effect.

Glossary defines the medical term for a substance that is used as the study control in a clinical trial, and examines placebos in AIDS research.

Committee for the Scientific Investigation of Claims of the Paranormal deals with the placebo effect in relation to alternative medicine.

Magazine article confronts the question of the placebo effect and how double-blind trials of medications may not always provide accurate results.

Encyclopedia entry defines "placebo," which is a nonmedical substance used as a control group in medical clinical trials.

Study investigates the placebo effect in relation to the efficacy of Prozac.

Read a definition of the "placebo effect" and learn about how a control group is used during an experiment.

Read the results from this meeting of placebo specialists in Germany.

"British Medical Journal's "Placebo Effect Involves Deception" looks at the difference between intentional and unintentional placebos.