An early study in psychology and intelligence testing, conducted by Cyrus Witt De Mead at the University of Michigan in 1904. De Mead explores the correlations between general intelligence, sensory acuity, motor skills and reaction times, using various experimental methods and statistical analyses. This book is a valuable historical document of the early days of modern psychology and cognitive science. 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.