_MENTIMETER NO. 1_: Typical Performances of Young Children. Success in this test is measured by performances in response to _situations_ created by the examiner to a much greater degree than by answers to _questions_ asked by the examiner. The directions themselves give the answers in most cases, and in the other cases the correct answers depend upon such facts as the name or sex of the individual being tested. No set of answers is printed here for these tests, therefore, since to do so would be to reprint exactly the directions appearing on pages 115 to 128, which the reader should consult carefully and even commit to memory before undertaking to apply the tests to any infants or young children. _MENTIMETER NO. 2_: Pictorial Absurdities. In order to receive credit the check mark on each picture should be placed in such a way as to indicate unmistakably the part of the picture which is incorrect—in such a way as to leave no doubt whatever as to the candidate’s having found and identified the incongruous element. The following are the elements that should be checked in each picture: 1. The front leg or foot. 2. The lower spout on the water pitcher. 3. The mouth on the forehead. 4. The horns (either one may be checked) on the horse’s head. 5. The candle on the right arm of the electric fixture. 6. The rat’s ears. 7. Either end of the spy-glass. 8. The next window to the rear on the third floor. 9. The postage stamp. 10. The sock used as a necktie. 11. The long stem of the lowest leaf. 12. The flag (flying in the opposite direction from the smoke and weather vane). 13. Either of the lights on the Ford. 14. The left front foot. 15. The man between first and second base (third man from the right). 16. The space between 4 and 5. 17. The claw hammer with which the man is driving the spike. 18. Either of the five fingers of the right hand. 19. The driver (facing the tail). 20. The ball being played by the man at the right. 21. The incandescent electric bulb. 22. Either of the roller skates. 23. The knife in the man’s right hand. 24. Either of the counterbalance weights on the drivewheels. _MENTIMETER NO. 3_: Maze Threading. No list of correct answers can be printed for this test. The stencil provided with the test blanks shows exactly what the correct and most economical threading of each maze is, but the reader can find this solution for himself if he will take the time and make the effort. No credit should be given for any maze not completely traced or for any maze in which a printed line has been crossed. A candidate who has gotten into a “blind alley” but has retraced his way and ultimately been successful in getting through the maze should have full credit for that particular maze. _MENTIMETER NO. 4_: Dot Pattern Correction.