How do you read the IQ score table?
Each row pairs a listed IQ score with its percentile, its rarity as “1 in N,” and a descriptive band. A percentile shows the share of the comparison group scoring at or below that score; “1 in N” expresses rarity in that group.
Wechsler scores are standardized to a mean of 100 and a standard deviation of 15. The table describes scores from normed tests, while IQClock’s timed reasoning test does not report an IQ score. For a score not listed, use the IQ percentile calculator.
Why do equal score steps mean different things?
Equal gaps on the scale do not mean equal changes in rarity. Scores near the middle are more common, while scores in either tail are less common, so the same score gap can correspond to different percentile changes.
The IQ scale explains how standardized scores relate to the distribution. Percentiles show relative standing in that distribution, not every part of a person’s reasoning or ability.
What do the IQ bands mean?
Bands are descriptive labels for score ranges. The labels here are commonly used WISC-V labels listed by Smart Kids with Learning Disabilities, a nonprofit; they are not the test publisher’s own table.
A band groups several scores together, so it gives a broad description. It does not provide a precise percentile or a personal assessment.