Medically reviewed by Dakari Quimby, PhD The intelligence quotient (IQ) is a standardized measure of cognition, or your ability to think, understand, reason, learn, and remember. By design, the ...

These four IQ quizzes are going to test your vocabulary and spelling. Then, after your brain is nice and warm, you'll face the ultimate IQ challenge with a quiz that covers all subjects. Have fun, ...

Is our level of intelligence inborn or acquired during our lifetime? Is it possible to become smarter and increase our IQ score? This is one of the hottest scientific and politically sensitive ...