It cannot be claimed that these tests, especially those below the three-year-old level, have been fully standardized. They are, however, very much better than the average parent or relative would be able to prepare for him or herself. The mental age score which will result from the use of these tests is not as reliable as will result from the use of the Stanford Revision of the Binet tests with older children, but its reliability is sufficient to point out cases of retardation in intelligence or of distinct brilliance of mind. THREE MONTHS _Control of Eyes._ Both of the eyes should look in the same direction and the child should be able to follow with its eyes the movements of bright objects in order to obtain credit in this test. _Hearing._ It will not be necessary for the child to react with a start or scream to loud noises and also to react by turning the eyes in the direction of less startling noises in order to obtain credit for hearing. Either evidence, if clear, will be sufficient to warrant giving credit. _Muscular Control._ The grasping of a pencil or rattle should not be taken as sufficient evidence of muscular control. The ability of the child, however, to move his hand directly to his mouth as described above will be in itself abundant evidence that the child merits a credit in this test. SIX MONTHS _Muscular Control._ Either balancing the head or sitting with some support for as much as ten minutes should be accepted as worthy of credit. _Self-direction._ The attempt to pull himself to a sitting posture should not be taken by itself as evidence of credit in this test. Only when it is accompanied by one of the other two evidences should it be credited. _Enjoyment._ Any two of the evidences of pleasure or displeasure listed may be taken together as indication of credit being deserved. ONE YEAR _Imitation of Movement._ Any one of the movements described, which the child learns within a short time by imitation, should give credit in this test. _Locomotion._ Either of the two methods of demonstration will be sufficient. _Understanding._ At least three familiar objects should be used in this test with success before credit is allowed. _Obedience._ At least two simple commands should be understood and obeyed before allowing credit. _Speech._ Not less than three different syllables should be used before credit is allowed. _Calling Attention._ No credit should be given at this point unless the child very evidently attempts to excite interest and attention in two or three different objects. TWO YEARS _Speech._ Any four distinct articles mentioned by the child when it desires them should be sufficient evidence to give credit here. _Pictures._ At least four different objects should be recognized and pointed out before credit is allowed.