Blinding is the process of preventing those involved in a Clinical trials are research studies involving people who use healthcare services. They often compare a new or different treatment with the best treatment currently available. This is to test whether the new or different treatment is safe, effective and any better than what is currently used. No matter how promising a new treatment may appear during tests in a laboratory, it must go through clinical trials before its benefits and risks can really be known. More from knowing to which comparison group a particular A person who takes part in a trial, often but not necessarily a patient. More belongs.