DrLivingston 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 if 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.