Placebos and Double-Blind Trials
To ensure a drug study is unbiased, scientists use placebos and double-blind techniques.
What is a "double-blind" trial?
What is Placebos and Double-Blind Trials?
"A double-blind study is one in which neither the participants nor the experimenters know who is receiving a particular treatment."
Why might a placebo be used in a double-blind clinical trial?
Choose the best explanation: why might a placebo be used in a double-blind clinical trial?
Select why might a placebo be used in a double-blind clinical trial?
Eliminating Bias
A placebo is a "fake" drug that has no active effect.
In a blind trial, the patient doesn't know if they have the real drug.
In a double-blind trial, neither the doctor nor the patient knows.
Double-blind trials prevent doctors from accidentally influencing the results with their expectations.
Accelerate your revision
Master placebos and double-blind trials and more with our exam-focused practice app.