Although the scientific method should be an integral part of all nutrition research, a study can be designed in a wide variety of ways. each study design presents unique advantages and challenges with implementation, and also in the type of data that can be collected. choose the item below that correctly describes a type of research study. although the scientific method should be an integral part of all nutrition research, a study can be designed in a wide variety of ways. each study design presents unique advantages and challenges with implementation, and also in the type of data that can be collected. choose the item below that correctly describes a type of research study. a clinical trial is an example of an epidemiological study. a study that compares a group of people with diabetes to a similar group of people without diabetes is an example of a case-control study. in a single-blind experiment, the researchers do not know which group receives the treatment. observational studies can be used to prove cause and effect.