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.

Question

Quizplus · Accepted Answer

This study is an example of a double-blind procedure because neither the participants nor the researcher (Dr. Livingston) knows who has received the placebo or the actual medication, eliminating bias from both the subjects and the observer.

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