At the time the call was made for volunteer subjects, it was clearly explained that no college credit would be given for service in the experiment and it was emphasized that the work would require considerable time and attention from those who entered. It is reasonable to believe that under these conditions those who offered themselves would be serious-minded and such as had previously done at least fairly well were taking the secretarial course and 9 the physical course with their college studies and who might feel that they could assume the added work without prohibitive difficulty.

1 This refers to the final personnel of Squad A, and includes Kontner but not Fretter. Of Squad B, 3.

In selecting the personnel for Squad A from the volunteers who offered, preference was given to those in the senior class and to men who were of age. No stress was placed on scholastic standing, but it is not surprising to discover that the men of this group have college records which average slightly higher than those of their fellow classmen. The college grades have been carefully investigated in reference to this matter, the college registrar, Mr. John F. Simons, kindly cooperating in this as on many another occasion. The record sheets were placed at our disposal and from these the grades were transcribed and later studied. Eight of the men of Squad A (Brown, Canfield, Gardner, Gullickson, Mover, Peckham, Tompkins, and Veal) were seniors.1 Their average college grade, which includes all the term grades given in all the subjects which these men had taken at the International Y. M. C. A. College prior to September 1917, was 88.6 per cent. There were 31 other men in the senior class. The average grade for the latter group, computed in identically the same manner as for the men of Squad A, was 86.3 per cent. Three of the men of Squad A as finally made up were sophomores (Montague, Peabody, and Spencer). The average grade of these in courses taken before September 1917 was 84 and that for a group of 27 fellow classmen was 83 per cent. The differences between averages, while in favor of the Squad A men, are rather small and would indicate that our subjects were not so much above the average student in ability that they could do average work without effort. Any prolonged and serious interference with mental efficiency would therefore probably show itself in their college class work.