This test is modelled directly upon the Vocabulary test included in the Stanford Revision of the Binet tests. It has been shown by careful scientific investigations that a test of this type is very reliable as a measure of general intellectual capacity. The excuse for having, at the end of the series, words which are little known and of no great practical value is that without such words it would be impossible to obtain a real measure of the vocabulary of writers, well-trained lawyers, and other specialists in the use of the English language. The good scientific test of intelligence always begins with elements which are so simple that the dullest mind will master them and progresses steadily to elements which are so complex and difficult that even the keenest minds have difficulty in reaching satisfactory solutions. A test of this sort measuring general vocabulary will be very useful to employers in the selection of stenographers and other clerical workers. In the public schoolroom teachers will find it very helpful in the classification of new pupils coming to their room for the first time or in the comparison of pupils who have been observed for a long period. The disadvantage of the test is that it must be given to one individual at a time. Such procedure makes it possible, however, for the teacher or the psychologist to study the more or less intangible attitudes and reactions of the pupil which cannot be observed in group examinations. These peculiarities of the pupil are of tremendous value to the trained psychologist or to the psychiatrist in making a careful diagnosis of special mental defects. _Directions for Giving the Test._ This test should not be given in the presence of outsiders. The examiner should take the individual to as quiet a place as possible, should seat the candidate in a comfortable chair, and converse with him until he is thoroughly at ease and ready to answer any sort of question. The examiner may write on his list the response which is made by the candidate to each word in the vocabulary. The formula which should be used by the examiner should be as nearly as possible that of ordinary conversation, although care must be used to avoid suggesting by the form of the question any clue to the proper response. Beginning with the first word, after introducing the general idea by some such phrase as “Now, I am going to ask you the meanings of a list of words,” the examiner should say, “The first word is coat. What is a coat?” If the candidate does not seem to understand, the question may be repeated or it may be presented as follows: “You know what a coat is, do you not? Well, what is a coat?”