Clinical Trial

I am proving that I learned something off of the clinical trials website....
I learned that in a trial there has to be at least 2 groups participating. In mine on narcolepsy there were three groups, one got a real drug for a certain dose, one got the same drug for a different dose, and the final got a placebo drug. The protocol said that the trial had to be a double-blind, which means that only the high and mighty scientists know who gets what drug. The subjects don't know and the people handing out the pills don't know. (lucky for them they didn't spill the pills) They do the double-blind experiment because it helps keep the results unbiased and true. This way the patients can't fake any of their symptoms and doctors can't falsify the reports for their own benefit. (People are greedy...)