what is a randomized control trial
Definition of Randomized controlled trial. Randomized controlled trial: (RCT) A study in which people are allocated at random (by chance alone) to receive one of several clinical interventions. One of these interventions is the standard of comparison or control. The control may be a standard practice, a placebo (sugar pill), or no intervention at all. Someone who takes part in a randomized controlled trial (RCT) is called a participant or subject.