Book excerpt: Excerpt from The Journal of Applied Psychology, 1922, Vol. 6 The New Castle County survey by the United States Public Health Service confined itself entirely to the school children of the county and, as has been noted, gave a considerably larger percent of mentally defective and probably mentally defective children. In a number of the surveys reviewed, it is evident that there must have been a good deal of variation in the judgments of different investigators engaged in the same survey. Although the fact is not stated, it is evident that a number of investigators must have been engaged simultane ously in this survey as 3793 children were studied in four months. A part of the preliminary examination given con sisted of questions suited in a general way to the child's age and school grade, and a part of the secondary examination consisted of tests and exercises that could not help but vary a great deal in the case of different examiners when these tests and questions had not been previously standardized or were incapable of standardization. Even though the per centage quoted here is higher than some of the others, it is evident that it is too low when cases which have a chrono logical age of 15 and a mental age of or a chronological age of 14 and a mental age of are accepted as normal because so considered, in spite of the above evidence, and even though the fact that the Goddard Scale measures somewhat short for these ages is taken into consideration. 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.