Dr Livingston Is Conducting a Study on the Effectiveness of a New

Multiple Choice

Dr. Livingston is conducting a study on the effectiveness of a new time-release antidepressant medication. Once a week, participants receive a small white pill from Dr. Stanley, which they take immediately without knowing whether the pill is the new medicine or a placebo. Dr. Livingston then observes the participants, without knowing which participants received the placebo. This type of study uses the

A) blind procedure.
B) blind procedure with placebo.
C) naturalistic observation approach.
D) double-blind procedure.