Adam, Bob, Eric, and Nathan are participating in a study. The researcher asks if any of them are married. Bob and Eric both raise their hands. The researcher sends Bob and Nathan to condition one and Adam and Eric to condition two. What kind of experimental design is the researcher using?

Answer: Correlated group design

Explanation: The experimental design adopted in the scenario above is called the correlated design grouping or matched pairs which are not random. The correlated group design technique is a study design in which subjects in both groups of the experiment are related with a certain characteristics. In the scenario above, the correlating feature is marital status where married subjects are placed in a group and the single subjects in the other.