Suppose that scientists want to determine if an experimental vaccine is effective in preventing a particular disease. In an experiment designed to test the vaccine, those participants who receive a placebo (nonmedicinal) solution rather than the proposed vaccine are part of what group?
A)control
B)research
C) placebo
D) experimental

Question

Quizplus · Accepted Answer

The group that receives the placebo solution is the control group. They are used as a comparison to the experimental group who receives the actual vaccine. By comparing the two groups, scientists can determine if the vaccine is effective in preventing the disease.

Suppose That Scientists Want to Determine If an Experimental Vaccine