Human Growth and Development / Unit 18 HGD 2588 short lesson, about 20 seconds
Fluid and Crystallized Across Adulthood
Captions available
The idea
Cattell's two abilities, entry 0930, follow different paths: fluid intelligence peaks in the twenties, entry 1543, while crystallized intelligence keeps rising through midlife, entry 1828, and holds past sixty, entry 2130.
In practice
A fifty-five-year-old editor who knows more words than ever but learns new software more slowly, entry 1828.
Where people slip
The two change together within individuals rather than compensating, entry 2130 found.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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