Intelligence: All That Matters

"A wonderful, readable summary of what we know about intelligence." Dylan Wiliam, Institute of Education The scientific evidence is clear: IQ tests are extraordinarily useful. IQ scores are related to a huge variety of important life outcomes like educational success, income, and even life expectancy, and biological studies have shown they are genetically influenced and linked to measures of the brain. Studies of intelligence and IQ are regularly published in the world's top scientific journals.