28 
EMPLOYMENT PSYCHOLOGY 
number of errors recorded. The object of this test was 
to bring out the subject’s ability to pick out the essential 
element from a more or less heterogeneous collection of 
elements, and also, in some measure, to bring out the 
deftness of the subject in handling the cards. These cards 
were so marked and numbered on their reverse side that, 
after every test, it was possible for the experimenter to 
sort them back into their original order and to observe 
the number of mistakes that had been made. In this 
way it was made possible for every subject to perform this 
test in exactly the same manner. 
3. The Woodworth-Wells cancellation test (see Appen 
dix, test number 6). The subject was requested to cross 
out, with a pencil, every “7”. 
4. The Woodworth-Wells “Easy Directions” test. 
5. The Woodworth-Wells number checking test, in 
which the subject was asked to place a check opposite 
every group which contained both a “7” and a “1” (see 
Appendix, test number 8). 
6. A modification of the tapping test, in which the sub 
ject was requested to push down, as rapidly as possible, 
a telegraph key to which was attached a Veeder counter. 
The number of recorded thrusts over a period of one min 
ute constituted the record for that performance. 
7. A modification of the Whipple accuracy test. This 
consisted of a brass plate with nine round holes graduated 
in size from I / 2 inch to l {8 inch in diameter. The subject 
was asked to take a brass-pointed pencil and insert it into 
each hole, beginning with the largest and continuing 
through the smaller ones, until the pointer touched the 
brass side of one of them. The brass-pointed pencil was 
wired in circuit with the brass plate containing the holes 
so that, whenever the brass point touched the side of the