Which statement best describes the stanine system?

• A. It places a score into one of nine bands and uses percentile-based scoring
• B. It is a 0-100 percentile scale
• C. It is a measure of reliability
• D. It is the same as a z-score

Answer: (A)

Stanine is a nine-point standardization that groups a person’s score into one of nine broad bands. Each band covers a wide range of performance, and a score of five sits near the middle of the distribution, with higher numbers indicating stronger performance. The key idea is that you’re not reading an exact percentile or a precise z-score; you’re getting a simple category that reflects relative standing based on where the score falls in the normative distribution. This is why the statement describing moving into nine bands and using percentile-based cutoffs to place scores is the best description. It’s not a 0–100 percentile scale, not a measure of reliability, and not the same as a z-score, which expresses distance from the mean in standard deviation units across the full distribution. Stanine provides a compact, easy-to-interpret snapshot of relative performance.