If you were to conduct an experiment on prayer and healing, what would be the best way to acquire your sample so as to eliminate any bias?

Answer 1

Before you get your sample, you need to answer these questions.

Are you talking about the patient praying, or others praying for the patient?

What are you trying to heal?

Answer 2

How can you attempt to control for any extraneous variables within your sample in your experiment on prayer and healing?