Which statement defines a normal T-score?

• A. Less than -2.5.
• B. Greater than -1.0.
• C. No lower than -1.0.
• D. Between -2.0 and -1.0.

Answer: (C)

Scores on a standardized scale are interpreted by how far they lie from the mean in units of standard deviation. A normal T-score sits within one standard deviation of the average, so it should not dip below -1.0. In other words, a T-score of -1.0 or higher is considered within the normal range, while scores lower than -1.0 begin to fall outside normal and may indicate impairment. The other ranges describe more extreme deviations or miss the lower bound that defines normal.