According to Campbell, Why Is Regression to the Mean Such

question 56

Multiple Choice

According to Campbell, why is regression to the mean such a likely explanation when evaluating the effects of social programs (e.g., speeding crackdowns) ?

• A)programs to fix some problem are usually begun after an especially bad year
• B)program evaluation is always correlational rather than experimental
• C)it is usually easy to rule out all other confounds
• D)regression is the one confound that cannot be evaluated by comparison with a control group

---

Definitions:

Water Volume

The quantity of three-dimensional space occupied by a liquid or gas, often measured in liters, gallons, or cubic meters.

Fish Kills

Events where a significant number of fish die suddenly in a particular area, often due to factors like pollution, lack of oxygen, or disease.

Industrial Chemicals

Substances produced for various industrial and manufacturing processes, often used in creating products or in operations.

Water Temperatures

The measure of how hot or cold water is, which can significantly affect aquatic life and ecosystem health.