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T-scores for Cognitive Abilities
±14.9 IQ Margin of Error

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Developed by Dr. Russell T. Warne

Meet Dr. Russell T. Warne - Chief Scientist and IQ researcher behind the RIOT IQ test.

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Russell T. Warne, PhD

Chief Scientist

About Dr. Russell T. Warne

Dr. Russell T. Warne is a distinguished educational psychology scholar specializing in research, measurement, and statistics. He earned his Ph.D. from Texas A&M University and spent over a decade as a faculty member at Utah Valley University.Dr. Warne's research on human intelligence and giftedness is widely recognized. He has published numerous articles in esteemed journals such as Psychological Bulletin and Intelligence. He is also the author of In the Know: Debunking 35 Myths About Human Intelligence, published by Cambridge University Press in 2020.As a member of the International Society for Intelligence Research and the editorial board of Intelligence and Cognitive Abilities, Dr. Warne actively contributes to advancing the field. He has received awards from prestigious organizations, including the MENSA Foundation and the National Association for Gifted Children.With his expertise and dedication to scholarship, Dr. Warne continues to shape the discourse and understanding of intelligence research, making significant contributions to the field.

Russell's articles & journals

Factor structure of intelligence and divergent thinking subtests: A registered report The relationship between Advanced Placement mathematics courses and students Possible economic benefits of full-grade acceleration Research on the academic benefits of the Advanced Placement program Spearman's g Found in 31 Non-Western Nations: Strong Evidence That g Is a Universal Phenomenon Five Reasons to Put the g Back Into Giftedness: An Argument for Applying the Cattell-Horn-Carroll Theory of Intelligence to Gifted Education Research and Practice Low base rates and a high IQ selection threshold prevented Terman from identifying future Nobelists

Russell's books

Journal of psychoeducational assessment cover

Free RIOT IQ Test

Explore this IQ Test

Learn how the test is structured and what it measures.

General details

Test Administration Details

Current version1.0 (2025)
Age range18+
ScoresGlobal IQ
NormsVolunteers who took the free RIOT IQ test online

Benefits

Score Report Overview

After completing the Free IQ Test, you'll receive your score report immediately. Your results will remain accessible as long as you have a Riot IQ account. This is our free IQ test, so your report will not be as robust as a paid Full IQ test. This score report includes:

Your IQ score (±14.9 IQ points margin of error)
A brief explanation of your IQ score
Your IQ score compared to other RIOT test-takers
Your T-scores compared to other RIOT test-takers

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