Under 90

Developing / Below Average IQ Range

A below average IQ estimate is a score under 90 on the standard IQ scale, where 100 is the mean and 15 points is one standard deviation.

Developing / Below Average

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What This Range Means

A below average IQ estimate is a score under 90 on the standard IQ scale, where 100 is the mean and 15 points is one standard deviation.

How Common Is This Range?

Scores under 90 are below roughly the 25th percentile. This range is common enough that many people in school and work settings fall near it, especially when a test is stressful, unfamiliar, or not matched to their background.

Cognitive Strengths At This Level

Common Challenges Or Growth Areas

Careers And Study Paths That Fit This Range

Well-Known People Often Associated With This Range

How To Grow Your Cognitive Skills

FAQ

Is a below average score a diagnosis?

No. This online result is an educational estimate, not a clinical diagnosis.

Can stress lower my score?

Yes. Anxiety, poor sleep, rushing, and unfamiliar question types can lower performance.

Should I retake the test?

Retaking after rest can be useful, but repeated attempts can inflate scores through practice.

Can I improve?

You can improve skills, knowledge, and test strategy. Adult IQ changes are usually modest.

Who can give an official result?

A licensed psychologist can administer standardized tools such as the WAIS or Stanford-Binet.

Explore Other Ranges

This page explains an educational IQ estimate. It is not a clinical diagnosis or an official high-IQ society qualification.