Excerpt from The Measurement of Intelligence: The Investigations and Results Reported in This Volume Were Made Possible by a Grant From the Carnegie Corporation This volume represents the fruits of three years of investigation (from July 1, 1922, to July 1, 1925) by the Division of Psychology of the Institute of Educational Research. It attempts to answer the essential questions concerning the nature and meaning of the measurement of a mental fact in the sample case of intelligence, or rather of a defined segment thereof. Its conclusions, in so far as they are warranted, should become the basis of sound practice in the construction and calibration of scales for use in mental mea surement. According to them, the present theory and practice of measurement of mental abilities are justified to a remarkable de gree in certain respects, but in others should be almost recreated. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.