intervals of time, so that the judgments of the various traits should be influenced as little as possible by the memory of where the different individuals in the list had been placed for other traits on previous occasions. In addition to this part of the experiment, each person was put through a series of seven psychological tests, all of which had been rather generally found to give results which revealed, to a very high degree of correctness, the general intelligence of people when this was determined in other ways, as by mental age, school grade, academic marks, opinions of teachers, judgments of friends, etc. The particular tests used were the Graded Completion Test, described in a previous section, and six so-called Association Tests, recommended by the Committee on Standardization of Tests of the American Psychological Association. They are usually known as Directions Test, Opposites Test, Supraordinate Concept Test, Whole-Part Test, Action-Agent Test, and Mixed Relations Test. Copies of the forms used in these tests are given in the Appendix. All of these tests involve the demand for the quick and accurate perception of and reaction to the relations of things or ideas to each other. Everything indicates that this ability is most important and determining in the composition of that characteristic which we vaguely call "general intelligence," especially if we are dealing with people with school experience. Furthermore, the academic marks of scholarship assigned to these twenty-five students by their instructors in different college branches during three terms of college work were secured from the official records. Judgments of the degree to which the different students had been prominent in extra-academic activities during their college career were made by officers of the college who had known them during this time. Photographs of the twenty-five persons, of the same general style and size, were secured also, as well as characteristic specimens of their handwriting. This experiment having been completed, a similar investigation was undertaken with twenty-five members of the senior class. The same method of procedure was followed as in the first case, the same traits judged, the same tests administered, etc. This second investigation thus affords a check on the results of the first study. When the results from the two investigations are averaged we have figures of considerable reliability, and fairly accurate data on numerous interesting questions.