What is the purpose of a placebo in an experiment?

Related questions

1. What is placebo used for?
2. What is an example of a placebo?
3. Do placebos work?
4. Is prayer a placebo?
5. Is placebo real?
6. Can doctors prescribe placebos?
7. Why is a placebo used?
8. What is Brian Molko worth?
9. Do placebos work if you know it's a placebo?
10. Is Brian Molko American?

Tags

1. #placebo
2. #doing
3. #purpose
4. #while
5. #placebos
6. #study
7. #other
8. #determine
9. #treatment
10. #medical
11. #administered
12. #patients
13. #participants
14. #whether
15. #research
16. #actual
17. #effect
18. #receive