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Statistical bell curve chart with markers showing how IQ scores thin out toward the gifted tail at 130
IQ Science

Is a Gifted IQ Score Reliable? The Math Says 1 in 4 Won't Repeat

July 1st, 2026

A gifted IQ score of 130 feels like a verdict, yet the reliability math expects more than 1 in 4 one-shot labels to regress below the line on a retest.

17 min•Read more
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