This classic book provides a comprehensive overview of the different techniques used to measure and test intelligence. It covers a wide range of topics, from basic measurement concepts and assessment tools, to more advanced topics such as factor analysis and the development of intelligence tests. It also explores the social and cultural implications of intelligence testing and the controversies surrounding its use. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.