— IQ Score Explained
What does an IQ of 115 mean?
An IQ of 115 sits one full standard deviation above the population mean of 100. In a normed distribution that places you in the top 16% of test-takers — roughly one in six adults. Most clinical frameworks classify this score as "High Average" or "Bright Normal", just below the Superior range that starts at 120.
This is the score range that quietly fills a disproportionate share of professional and technical work. People at this level pick up new procedures faster than colleagues, handle higher-density information without overload, and can hold longer chains of inference in working memory.
What 115 actually represents
One standard deviation above the mean translates to:
- Noticeably faster pattern recognition on novel material
- Stronger working memory for multi-step reasoning
- Easier mastery of abstract systems (math, logic, programming, formal languages)
- Most undergraduate university programmes within reach without strain
Importantly, the gap between 115 and 100 is much smaller than the gap between 130 and 115 — the IQ scale is normal, not linear, so each additional standard deviation cuts a much smaller fraction of the population.
How 115 compares to other scores
- IQ 85 — one SD below mean, 16th percentile
- IQ 100 — the population mean, 50th percentile
- IQ 115 — top 16%, "High Average" (you are here)
- IQ 120 — top 9% (Superior)
- IQ 130 — top 2.3% (Highly Gifted, Mensa cutoff)
- IQ 140 — top 0.4% (Genius)
How to test your actual IQ
Most free online tests inflate scores to make them shareable. A real estimate requires item response theory — each question has known difficulty and discrimination parameters, and your final score is calculated from the specific pattern of right and wrong answers.
Core Brain uses 3PL Bayesian MAP estimation under a normed prior. Twenty minutes, 40 calibrated items, six cognitive axes, a normed score with a 95% confidence interval.
Take the Core Brain IQ test →Frequently asked
Is 115 considered gifted?
No. The conventional cutoff for giftedness is 130. 115 is "High Average" or "Bright Normal" — above the median but well below the gifted threshold.
How rare is an IQ of 115?
About 1 in 6 adults score 115 or higher. In a typical 30-person office, roughly 5 people would meet or exceed this score on a properly normed test.
Will an IQ of 115 get me into Mensa?
No. Mensa requires the 98th percentile, which corresponds to an IQ of 130 on most scales. 115 is the 84th percentile — significantly below the threshold.