A doctor gives some of the patients a new drug for treating acne and the rest of the patients receive the old drug. Neither the patient nor the doctor knows who is getting which drug. Is this a blind experiment, double blind experiment, or neither? Why? Double blind. Neither the doctor or the patients know who is getting which drug. Blind. The doctor would know which drug the patient receives. Blind. The patients would know which drug they receive. Neither. Both the doctor and the patients would know who gets what drug.