Dr Q is conducting an experiment to determine if vitamin Z can reduce blood pressure in a group of middle-aged adults.Dr Q asks a collegue,who is not involved in the study,to use a computer programme that assigns the students to one or two groups,purely on the basis of chance.One group receives a capsule of vitamin Z and the other group receives a vitamin-free pill that tastes and looks identical to the vitamin Z capsule.Neither Dr Q nor the participants know who is receiving the vitamin and who is receiving the vitamin-free pill.Which statement best describes the experiment?

Question

Quizplus · Accepted Answer

This is a double-blind intervention trial that is randomized, meaning that participants are assigned to either the treatment group receiving vitamin Z or the control group receiving a placebo purely on the basis of chance. It is also double-blind because neither the participants nor the researchers know who is receiving the vitamin and who is receiving the placebo. The control group is important because it allows for comparison with the treatment group, which is designed to show a causal relationship between vitamin Z and blood pressure.

Dr Q Is Conducting an Experiment to Determine If Vitamin