Brain & IQ
Plain-English guides to IQ tests, what the scores mean, how matrix puzzles work and how to train memory and reasoning.
Understand the problem
Scores
- Average IQ by Country: Read the Rankings Before You Quote Them
- IQ Score Chart: Every Range and Percentile in One Place
- What Is a Good IQ Score? A Plain-English Guide
Taking a test
Compare your options
Improving
- Brain Training Games That Work, and What to Expect From Them
- How to Improve Working Memory: Drills, Habits, a Routine
- How to Increase Your IQ: What the Evidence Supports