No. 1.] 



PSYCHOLOGICAL EXAMINING IN THE UNITED STATES ARMY. 



193 



(f) EXPRESSING AND rNTEKPRETING RESULTS. 



Tbe results of the performance-scale examination should be expressed in the following ways: CI) Total weighted 

 score; (2) letter rating; (3) mental age. The letter ratings corresponding to various scores and mental ages are as 

 follows: 



Letter ratings should be assigned as follows: 



Complete scale. Short scale. 



A . 260-311 275-308 



B 240-259 250-274 



C+ 215-239 220-249 



C 190-214 190-219 



C- 150-189 145-189 



D 90-149 85-144 



D- 0-89 0-84 



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. 



Subjects obtaining a score of 100 points or more (short scale) may ordinarily be recommended for regular military 

 training; subjects obtaining 40 to 99 points should be considered for assignment to service organization or Development 

 Battalion; those below 40 points should ordinarily be considered for discharge. 



5. MECHANICAL-SKILL TEST. 



The mechanical test is intended for use (1) in aiding decision in doubtful cases under individual consideration, 

 and (2) as a special test of mechanical skill. 



Materials. — One set mechanical test (Stenquist), single series 1. 



Directions. — Place the open box before subject with the cover toward him. Say, "Here are some things that have 

 been taken apart. You are to put them together. Begin here (pointing to A) ; lake the parts and put them together so that the thing 

 will work. Then go on to this one (pointing to B); then to the next, and so on. If you come to one that seems very hard, 

 go on to the next one, andif there is time later try it again. The more things you get done the larger your score. Ready — Go. " 



Time for the entire test, 30 minutes. 



Scoring. — Give 10 points for the complete and correct assembling of each object. Total possible score, 100. 



If the assembling of any object is only partially correct, give partial credit, according to the schedule. A list 

 of the possible steps in the assembling is given for each object. Note in each case of partial solution which steps have 

 been completed, and give credit for each step as indicated. The items indented are alternative reactions, therefore 

 give credit of only one number of points from any group of indented items. 



It will be noted in D, for example, that, failing only to screw cover on, subject gets but 6 points, while screwing 

 the cover on counts but 1 point. The additional 3 points of penalty are for lack of "workability." If any step is 

 omitted in the solution of any object except E, then item of "workability" is considered as lacking. In E, however, 

 credit of 2 points is given for workability if the solution is correct except only 2 sides snapped or caps out of order, 

 or both. 



In case of the lock, the spring is properly inserted when the bend is hooked over the projection in the frame to 

 prevent slipping. By "Spring inserted workably" is meant one of the three other workable positions in which it 

 is possible to place the spring, but which make no use of the bend. 



