What Are Fluid and Crystallized Intelligence?
What it means to reason through a new problem versus use knowledge you have already acquired, how the two are measured, and why they are related rather than separate minds.
What Is Fluid Reasoning?
Fluid reasoning is the broad ability involved when a
Is Intelligence One Ability or Many?
Why human cognitive ability is neither one undivided faculty nor a collection of unrelated talents—and what “both” means in practice.
What Is Processing Speed?
Processing speed is not simply "how fast your brain works."
What Is General Intelligence (g)?
What the general factor is, how researchers obtain it from many different cognitive tests, what an individual's g score means, and why g is not the same thing as IQ.
What Is Working Memory?
Working memory is the limited system that keeps information available for use in ongoing thought. It matters whenever we must hold onto something while doing something else with it.
What Is Intelligence?
A scientific guide to what we mean by intelligence—in humans, other animals, artificial systems and the study of cognitive ability.
How Intelligence Is Used in Real Life
Intelligence does not enter real life alone. Ability becomes performance through an encounter with knowledge, task demands, current state, tools and environment.
Why Intelligence Is More Than a Score
A cognitive score is useful because it compresses information. Understanding what survives that compression—and what does not—is the beginning of responsible interpretation.
Where Do We Start When We Talk About Intelligence?
Before asking how intelligent someone is, it helps to ask what intelligence is supposed to explain—and what our measurements can actually tell us.