For the further aid of the experienced examiner a condensed record blank has also been prepared. Although this is considerably cheaper than the original Record Booklet and in certain respects perhaps somewhat more convenient, it is not recommended as a satisfactory substitute except when used by thoroughly trained examiners. Beginners, at least, should continue to use the complete Record Booklet both because of the accuracy of procedure which it fosters and because of the advantages of having a complete verbatim record of the responses. Besides being indispensable for the analytical study of the child's mental processes, the complete record makes possible the correction of errors in scoring and permits interesting qualitative comparisons between earlier and later performances by the same subject. It is believed that only for the veteran examiner, and perhaps even then only in special cases, are these advantages outweighed by the lower cost of the abbreviated blank. The labor of preparing this _Guide_ was made considerably lighter than it would otherwise have been by the fact that a similar guide had been prepared in the Office of the Surgeon-General for use in the army. I am greatly indebted to Dr. J. W. Bridges and to Major H. C. Bingham for assistance in the preparation of the latter. Their careful work has saved me many hours and has doubtless made the _Condensed Guide_ more accurate and serviceable than it could otherwise have been. LEWIS M. TERMAN _Stanford University, March 31, 1920_ GENERAL DIRECTIONS General directions for the use of the Stanford Revision have been fully set forth in chapter VIII of _The Measurement of Intelligence_. As this guide is only a handbook of procedure for the tests themselves, I shall not here undertake either to summarize that chapter or to add to it. I trust it may safely be assumed that no responsible person will attempt to apply the tests who is not familiar with the book which explains them and presents the general considerations which should govern their use. However, extended observation of the difficulties which students and teachers encounter in learning to use the Stanford Revision has taught me that there are certain injunctions which cannot easily be too often repeated. Among these the following "ten commandments" have been selected for reemphasis here: