Which type of study design would be best to use in donducting this research : 1. Do couples who cohabit prior to marriage experience greaater success in keeping the marriage together? AND 2 How do gorillas mate? AND 3. How do people in elevators behave? AND 4. Does takin Vitamin C reduce the number of colds? AND 5. Does touch affect the physical growth of children? AND 6. Are people who eat fast more likely to be obese?
An experiment is an orderly procedure carried out with the goal of verifying, refuting, or establishing the validity of a hypothesis. Experiments provide insight into cause-and-effect
by demonstrating what outcome occurs when a particular factor is
manipulated. Experiments vary greatly in their goal and scale, but
always rely on repeatable procedure and logical analysis of the results.
There also exist natural experimental studies.