IQ Blog

Alfred Binet created the first modern IQ test in 1905 with Théodore Simon. Learn why it was built, how it works, and how Stanford–Binet and Wechsler evolved it.

See what a real IQ test includes: verbal, visual-spatial, working memory, and processing speed plus sample tasks, timing, scoring, and how online tests differ.

Take the 3-Question IQ Test (Cognitive Reflection Test); solve three fast puzzles, see answers, and learn why it measures reflection, not a full IQ.

Learn how to prepare for an IQ test with study tips, test-taking strategies, and a 7-day prep plan to boost performance and show your true ability.

From Binet–Simon to Stanford–Binet, Army Alpha/Beta, and Wechsler—trace the history of IQ tests, key debates, and modern, ethical uses.

Debunking IQ myths with evidence: what IQ tests really measure, how they predict outcomes, EQ vs IQ, effects of schooling, and how to use tests fairly in practice.

Celebrity IQ lists, TV geniuses, and viral quizzes see how pop culture portrays intelligence and what research really says about testing, myths, and measurement.

Explore the science of IQ testing its history, methods, theories, and limits and discover how it’s used in education, psychology, and research.

Discover 8 science-backed ways to improve your IQ, from memory training to music lessons. Boost your brain power with proven, everyday habits.

Discover the differences between IQ and EQ, why both matter in the workplace, and how to improve them for personal growth and career success.

With an average score of 100 and different IQ scale ranges, the GBI’s IQ test results tell you about your IQ score, IQ ranking, and which facets of cognitive ability you are strong and weak at.

Although IQ test results can differ, a common benchmark for the average IQ score across various tests is 100, with approximately 68% of scores falling within the range of 85 to 115. With a median IQ score of 100 and a deviation of 15, approximately 68% of people fall within the "normal" or "average" range of intelligence when taking the IQ tests. The average IQ