The ability to reason and solve problems, or general intelligence.

Condition in which a person’s behavioral and cognitive skills exist at an earlier developmental stage than the skills of others who are the same chronological age; may also be referred to as developmentally delayed. This condition was formerly known as mental retardation.

The awareness of and ability to manage one’s own emotions to facilitate thinking and attain goals, as well as the ability to understand emotions in others.

The 2% of the population falling on the upper end of the normal curve and typically possessing an IQ of 130 or above.

A number representing a measure of intelligence, resulting from the division of one’s mental age by one’s chronological age and then multiplying the quotient by 100.

The tendency of a test to produce the same scores again and again each time it is given to the same people.

The degree to which a test actually measures what it’s supposed to measure.

Condition in which being made aware of a negative performance stereotype interferes with the performance of someone that considers himself or herself part of that group.