182 



MEMOIRS NATIONAL ACADEMY OF SCIENCES. 



[Vol. XV, 



65 depredation 



66 promontory 



67 frustrate 



68 milksop 



69 philanthropy 



70 irony 



71 lotus 



72 drabble 



73 harpy 



74 embody 



75 infuse 



76 flaunt 



77 declivity 



78 fen 



79 ochre 



80 exaltation 



81 incrustation 



82 laity 



83 selectman 



84 sapient 



85 retroactive 



86 achromatic 



87 ambergris 



88 casuistry 



89 paleology 



90 perfunctory 



91 precipitancy 



92 theosophy 



93 piscatorial 



94 sudorific 



95 parterre 



96 homunculus 



97 cameo 



98 shagreen 



99 limpet 



100 complot 



Note. — To get the entire vocabulary, multiply the number of correct definitions by 180. 



(b) ADAPTATION FOB USE WITH ILLITERATES. 



In the examination of an illiterate subject only those tests in each year-group which are starred in the record 

 booklet should be given. When only the starred tests are given, credits should be assigned in accordance with the 

 following table: 



Years 3 to 10 3 points (or months) per test. 



Year 12 5 points (or months) per test. 



Year 14 6 points (or months) per test. 



Year 16 7£ points (or months) per test. 



Year 18 9 points (or months) per test. 



The probable error of a mental age score derived by the scale as thus abbreviated is approximately 7\ months, 

 as contrasted with a probable error of less than 6 months for the unabbreviated scale as applied to unselected adults. 



(C) EXPRESSING AND INTERPRETING RESULTS. 



As this is an age scale, the responses are ordinarily scored in terms of months. They may also be scored in 

 terms of points by those who prefer this method. When this is done, each test is given a point value corresponding 

 to its value in months. A subject is credited with the full number of points for each test below the year-group 

 actually given, and in addition with 24 points for years 1 and 2. He is also credited with the actual number of points 

 scored in the year-groups given. It is thus possible to score as high as 30 points (months) in year XVI and 36 in year 

 XVIII, making a total possible score of 234 points, or a mental age of 19 years, 6 months. If fewer than the regular 

 number of tests are used from a given year-group, each test should be assigned a proportionately higher point value. 

 If more than the regular number are used, each test should be assigned a proportionately lower value. Where half 

 credit is allowed for a response, half the number of points is given. 



The results of Stanford-Binet examinations are to be expressed in the following ways: (1) Mental age in years 

 and decimal of a year; (2) letter rating. 



Mental ages correspond to the letter ratings as follows: 



A 18.0-19.5 



B 16.5-17.9 



C+ 15.0-16.4 



C 13.0-14.9 



C- 11.0-12.9 



D 9. 5-10. 9 



D- Below 9. 5 



Subjects obtaining a score of 10 years (120 points) or more may ordinarily be recommended for regular military 

 training; subjects between 8 and 10 years (96 to 119 points) should be considered for assignment to service organization 

 or Development Battalion; subjects below 8 years (96 points) should be considered for discharge. 



Grade E should be given to all men who are recommended by the examiner for discharge, Development Battalion, 

 or service organization, and to such men only. All men whose intelligence is deemed satisfactory for regular military 

 duty shall be given rating of D— or higher. 



4. PERFORMANCE SCALE EXAMINATION, 

 (a) PROCEDURE. 



Test 1, the ship test. 



Materials. — A frame and 10 pieces which, when properly fitted together, form a ship. 



Directions. — Examiner shows subject the frame with the pieces properly fitted therein, and says, " This is a picture 

 of a ship. Look at it carefully." Subject is allowed to look at the picture for 10 seconds; then examiner withdraws the 

 picture from view, removes the pieces, and presents the empty frame and the pieces arranged as in figure H. The 

 pieces may be numbered on the edge toward examiner from left to right to indicate their positions. The frame is 

 next the subject. Examiner says, ' ' Put these pieces in the frame as quickly as you can so as to make the ship you just saw." 



Subject is given five minutes, and is allowed to make any changes he wishes within the time limit; but examiner 

 must not suggest the changes. 



Scoring. — A score of one is allowed for each of the lower or upper pieces, if placed in the lower or upper portion 

 of the frame — i. e., the "water" pieces at the bottom and the "sky " pieces at the top, except that no credit is given 

 for an inverted piece. In addition to this, a score of one is given to each piece that is in its correct relative position 

 in the upper or lower row. The maximum score for accuracy is thus 20 points. 



If the score for accuracy is 18 or more, additional credit is given for time as follows: 

 Time. 



0-20 



21-30 



31-50 



The maximum raw score is therefore 25 points. 



Credit. 

 . 5 

 . 4 

 . 3 



Time. 



51- 80. 



81-120. 

 121-300. 



Credit. 

 .. 2 

 .. 1 

 .. 



