DrGomez Is Investigating a New Drug Designed to Reduce Anxiety

Multiple Choice

Dr.Gomez is investigating a new drug designed to reduce anxiety.Patients with an anxiety disorder are treated with either the drug or a sugar pill (placebo) for some time,and Dr.Gomez records their anxiety levels at weekly appointments.If a double-blind procedure is used,who will know if a placebo or drug was administered?

A) the patients but not Dr.Gomez
B) Dr.Gomez but not the patients
C) neither Dr.Gomez nor the patients
D) both Dr.Gomez and the patients