What is the true cause of a placebo effects? Webster’s dictionary provides a not-cause, but no cause: “improvement in the condition of a patient that occurs in response to treatment but cannot be considered due to the specific treatment used“.
Oxford’s dictionary offers a similar definition, but suggests a cause “A beneficial effect produced by a placebo drug or treatment, which cannot be attributed to the properties of the placebo itself and must therefore be due to the patient’s belief in that treatment“.
Is Oxford’s dictionary right? Are the patient’s beliefs the ‘true cause’ of a placebo effect? Let’s look at the logic. First, what is NOT the cause of a placebo effect?
Dictionaries agree, Webseter: “cannot be considered due to the specific treatment used“, Oxford: “cannot be attributed to the properties of the placebo itself“. Continue reading →



