What is a primary reason to update normative data periodically?

• A. To reflect changes in demographics and training practices
• B. Because norms are published by large agencies
• C. Because performance trends and populations change over time, requiring updated norms
• D. Because the original norms are always accurate

Answer: (C)

Norms must be updated because how people perform on tests and who is being tested change over time. Demographics shift, training practices evolve, and testing conditions differ, all of which can move where the average and typical performance lie. Updating norms with current data keeps score interpretations accurate and fair for today’s population, so a person’s score reflects how they compare to today’s reference group rather than to a past group. The other ideas—such as norms being published by a big agency or the belief that original norms are always accurate—don’t explain why updates are needed.