Excerpt from Aviation Physiologists Bulletin, Vol. 7: September 1944 First it should be noted that the sample used in this test retest study (49 men) is of such a small nature as to affect the actual reliability of the study. Nevertheless, some indications may be noted. From the Observed figures the mean of the retest scores rise. However from previous test retest data on these same tests we find approximately the same degree of mean improvement from test to retest. Therefore it is safe to assume that there is no evidence for any change in.ability' level of the 49 men retested on Reading Comprehension and Math. B caused by their prolonged exposure to partial anoxia. 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.