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APPENDIX 
where it belongs. Each piece fits loosely, so don’t try to 
force it. Do this quickly and carefully.” After subject 
has finished, repeat the test. 
Record: Each attempt to place a piece in the wrong space 
counts as an error. Mistrials of a piece in the right space 
are not counted, (i) because it is impossible to count them; 
(2) the total time compensates for them automatically. 
Record, for trial a and b, the time and number of mistakes. 
Rating: Point of reference, completion of test in 56 seconds; 
RU, 14; RU, 4, E count 1. Apply formula II. 
91. Machine Operator’s Test 
Description: See Chapter X. 
Instructions: Examiner in preparation makes sure that the dial 
is revolving at a speed of 35 R. P. M. “I want you to 
drop a ball through the slot into the funnel like this: 
(Examiner drops five or six balls in succession.) Use this 
hand (demonstrating with the left hand) to pick up the 
balls and pass the balls to your other hand one at a time 
like this. (Examiner drops three more balls.) If the ball 
fails to go through the slot or falls on. the floor, don’t pay 
any attention to it but keep right on with the others. See 
how many balls you can drop through the funnel. Now, 
try it. All right? Start.” Subject is allowed to go on for 
two minutes with occasional suggestions from examiner 
to correct bad practices. Then allow an interval of one 
minute during which the examiner makes his records and 
engages the subject in conversation. Another trial of two 
minutes is then given. After another minute interval, a 
third trial of two minutes is given, this time with the slot 
half closed. Each time the examiner makes a reading on 
the Veeder counters at the beginning and at the end of 
the trial in order to determine the R. P. M. and the num 
ber of successful attempts made by the subject. 
Record: There are three trials, to be designated a, b, and c.