Question

1. case-control studies are small-scale epidemiological studies.

true
false

1. participants in the experimental group receive the intervention.

true
false

1. participants in the control group receive the placebo.

true
false

Explanation:

Question 9

Case - control studies can be of various scales, not just small - scale. They are observational studies that compare people with a disease (cases) to those without (controls) to identify risk factors. So the statement that they are only small - scale is false.

In an experimental study, the experimental group is the group that is exposed to the intervention (the treatment or the variable being tested), while the control group is used for comparison (often receiving a placebo or standard treatment). So participants in the experimental group do receive the intervention.

In a typical experimental design, the control group is used to provide a baseline for comparison. Often, the control group receives a placebo (a substance with no therapeutic effect) when the experimental group receives the actual intervention. This is to determine if the intervention has a real effect. So participants in the control group often receive the placebo.

Answer:

False

Question 10