So let's keep going here. Before taking the pills, and a day afterwards, the patients were asked to fill out questionnaires regarding their condition. Then the doctors analyzed the overall changes in questionnaires for each group and compared them. All right, so first of all, what type of study is this? Well, we're taking our groups, we are randomly putting them into two different groups. You could call the placebo group, maybe the control group, and then you're putting the real pill as your actual experimental group. And so this is a classic experiment.