One way that researchers study the effects of trans fats on people's health is by setting up controlled experiments. For example, in an experimental feeding trial, participants agree to stick to specific diets that the researchers prescribe. In this case, the researchers might vary the proportions of saturated, unsaturated, and trans fats in the diet of each participant. Throughout the study, the health status of the participants is monitored closely. Suppose that you are a researcher designing an experimental feeding trial. How would you set up your study and what limitations would you face?
Drag the labels onto the flow chart to identify the elements and limitations of your experimental design.