Part 10/15:
IQ tests have demonstrated construct validity through their correlations with skills like rapid problem-solving and quick manipulation of abstractions. These tests probe the speed of neural processing, a physiological marker tied to brain structure, axon thickness, and neural efficiency. Higher IQ correlates with larger brain volume, faster reflexes, and more robust neural pathways, which translate into better health outcomes and resilience.
The Enigmas of Industriousness and Self-Regulation