32 
EMPLOYMENT PSYCHOLOGY 
Table of Ranks and Resulting Correlations 
Name of 
Rank in 
Rank in 
Rank in 
Girl 
Production 
First Test 
Second Test 
A. . . 
I 
I . . . . 
8 
B... 
5 
C... 
3 
3 • • • • 
3 
D... 
4 
4-•• • 
2 
E. . . 
s 
S --- 
4 
F. . . 
6 
6.... 
7 
G... 
7 
7-•• ■ 
9 
H... 
8 
8.... 
I 
I.... 
9 
9-•• • 
IO 
J-... 
IO.... 
6 
Correlations. i. oo 
-19 
per hour is ranked as number one, the one who turns out 
next most as number two, and so on down the line to 
number ten. Every girl having been ranked on the basis 
of output from 1-10, the next step is to take one of the 
tests in question and rank each of the ten girls in the same 
fashion according to her work in that test. We are now 
ready to compare the output of the girls with their rank 
in the test. For the sake of explanation, let us suppose 
that the first girl in production was first in the test; the 
second in production, second in the test; the third in 
production, third in the test, etc., right through the group, 
the tenth or lowest in output being tenth or lowest in the 
test. It is evident from this that we should have a perfect 
agreement or correlation between the performance of the 
girls in the test and their performance in their regular 
work. 
Now, let us suppose that, in another test, there was not 
such an agreement. Suppose that the girl who was high