Category Intelligence

A standard score turns raw performance into a common scale so that a result can be interpreted relative to a reference distribution.

An IQ percentile describes relative standing in a norm group. It is not the percentage of questions answered correctly and not the percentage of intelligence a person possesses.

“Average” is not a kind of person. It is a position within a reference distribution created by comparing performance with an appropriate norm group.

People can change substantially while their relative standing compared with others becomes increasingly stable. Those are not contradictory facts.

Intelligence can help a person reason well. Wisdom asks a different question: how well is judgment used when values, uncertainty, other people and the consequences of action matter?

Intelligence helps us reason through problems; creativity concerns producing ideas or products that are both original and appropriate.

Executive functions help control thought and action toward a goal. Intelligence is broader—and the overlap between them is real without making them identical.

Ability helps produce achievement, but an achievement is the result of ability plus learning, effort, opportunity and many other conditions.

Intelligence helps us acquire and use knowledge. Knowledge is what experience and learning have already put at our disposal.

How psychologists infer ability from observable performance, why the same person can perform differently across occasions, and where context belongs without turning every score into…