It’s the range of scores expected from a test taker of a certain age and gender. It helps healthcare providers to determine if your baseline test scores are valid or not.
Normative data is collected by testing a large group of people representative of the population. Some of the test takers score higher and some lower, which establishes the limits of normal/typical performance.
A valid ImPACT Baseline Test means test results fell within the range expected from someone of the same age and gender. If you ever get a concussion, healthcare providers have a valid comparison tool to help determine your treatment and rehabilitation.
An invalid ImPACT Baseline Test means at least one of the test scores fell outside the range expected from someone of the same age and gender. You should take ImPACT Baseline Test again or visit your healthcare provider if you received invalid baseline test results after taking it for the second time.