A researcher was interested in studying the effects of a new medication on depression. One group received the new medication and another group received a standard medication for depression. The researcher asked participants to answer a series of questions rating their mood levels before and after six weeks of taking the medications. Which of the following is the control condition in this study?
A
The group receiving the new medication
B
The group receiving the standard medication
с
The rating of the participant's mood levels
D
The series of questions
E
The participants