Regarding the stability of IQ test scores throughout the lifespan, what is the earliest age at which IQ scores reliably predict later adult outcomes?

Question

Quizplus · Accepted Answer

Studies have shown that IQ scores become increasingly stable throughout childhood and into adolescence. By late childhood (around age 10), IQ scores can reliably predict later adult outcomes such as educational attainment and occupational success. Infancy is too early to make accurate predictions, and IQ scores may still be influenced by environmental factors during adolescence and early adulthood.

Regarding the Stability of IQ Test Scores Throughout the Lifespan