Why is a placebo used?

Related questions

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

Tags

1. #study
2. #acupuncture
3. #effect
4. #devices
5. #clinical
6. #inactive
7. #often
8. #under
9. #better
10. #physical
11. #placebos
12. #treatments
13. #trials
14. #researchers
15. #overall
16. #treatment
17. #experimental
18. #evaluate
19. #control