Human Efficiency and Levels of Intelligence

This is an OCR edition without illustrations or index. It may have numerous typos or missing text. However, purchasers can download a free scanned copy of the original rare book from GeneralBooksClub.com. You can also preview excerpts from the book there. Purchasers are also entitled to a free trial membership in the General Books Club where they can select from more than a million books without charge. Original Published by: Princeton University Press in 1920 in 144 pages; Subjects: Education / Educational Psychology; Education / Testing & Measurement; History / General; Psychology / General; Psychology / Cognitive Psychology;