Mental age (MA)心理年龄—measure of an individual’s level of mental development
Chronological age生理年龄— the number of years since birh
Origins of Intelligence Testing
Intelligence is a very general mental capability that involves the ability to reason,plan, solve problems, think abstractly, comprehend complex ideas, and learn from experience.
It provided a base for the concept of intelligence quotient (IQ)
Intelligence quotient (IQ)
IQ
score
=
mental age chronological
(MA) X age (CA).
100
The Wechsler Intelligence Scales
Significantly sub-average intellectual functioning
Limitations in adaptive skills (such as communication, self care, social skills, health and safety, work).
Construct validity结构效度
Norms and Standardization 常模与标准化