What is a typical disadvantage of natural experiments?

What is a typical disadvantage of natural experiments?

• A. They have complete control over extraneous variables
• B. They provide random allocation
• C. Lack of random allocation can create confounding variables
• D. They always take place in a lab

Answer: (C)

A typical disadvantage is the lack of random allocation, which allows confounding variables to influence the results. In natural experiments, the researcher doesn’t control how participants end up in each group, so pre-existing differences or outside factors can account for observed effects. This threatens internal validity and makes it harder to conclude that the independent variable caused the outcome. For example, comparing regions with and without a policy might be affected by other regional differences like economy or policing, rather than the policy itself. Because of that, statements about complete control over extraneous variables or random allocation aren’t true for natural experiments, and they don’t have to occur in a lab.

A typical disadvantage is the lack of random allocation, which allows confounding variables to influence the results. In natural experiments, the researcher doesn’t control how participants end up in each group, so pre-existing differences or outside factors can account for observed effects. This threatens internal validity and makes it harder to conclude that the independent variable caused the outcome. For example, comparing regions with and without a policy might be affected by other regional differences like economy or policing, rather than the policy itself.

Because of that, statements about complete control over extraneous variables or random allocation aren’t true for natural experiments, and they don’t have to occur in a lab.