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Example of a Placebo Effect: Sham Surgery
Sham surgery is a simulated surgical procedure used as a rigorous control condition to evaluate the true efficacy of an operation. In a notable study on osteoarthritis of the knee, control participants received a tranquilizer and small incisions but no actual procedure. These participants demonstrated physiological improvements in knee pain and function equal to those who received the real arthroscopic surgery, powerfully illustrating that physiological disorders can be positively impacted by the placebo effect.
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Research Methods in Psychology - 4th American Edition @ KPU
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Pain relief (pathological)
Example of a Placebo Effect: Sham Surgery
Comparing to the Best Available Alternative Treatment
What term describes a positive outcome resulting from a simulated treatment, driven largely by an individual's expectation that they will improve?
Control Condition Examples
No-Treatment Control Condition
Placebo Control Condition
Wait-List Control Condition
Example of a Placebo Effect: Sham Surgery
Comparing to the Best Available Alternative Treatment
In an experiment, how is a control condition defined?