Before revision: The book is about the topic of the general factor of human mental ability, or g. Summary The book traced the origins of the idea of individual differences in general mental ability to 19th century researchers Herbert Spencer and Francis Galton.
After revision: The book is about the topic of the general factor of human mental ability, or g. Summary The book traces the origins of the idea of individual differences in general mental ability to 19th century researchers Herbert Spencer and Francis Galton.