PART I 
PSYCHOLOGICAL TESTS 
The practical possibilities of psychological tests are now 
generally conceded, both by the professional psychologist 
and the industrial layman. Thus far, however, the 
applications of these tests to industry, particularly in 
respect to employment, have been fragmentary and in 
tangible. Before industrial leaders will commit them 
selves to any definite psychological program they de 
mand a concrete account of the tangible results arising 
from a thorough and comprehensive application of psy 
chological tests to typical industrial problems. 
Part I is devoted largely to such an account. It de 
scribes the results obtained from the application of psy 
chological tests to employment problems under typical 
industrial conditions. Moreover, it describes the method 
by which these results were obtained. Results in them 
selves are of little value unless they are secured by 
a method which will produce similar results when applied 
elsewhere. For that reason special pains are taken to 
make clear the steps by which the results were reached. 
The psychologist not familiar with shop and office con 
ditions will find these steps very valuable when he at 
tempts to make his own applications to industrial prob 
lems. The industrial layman who is not familiar with 
the exact methods of psychology will find them a prac 
tical guide in estimating the value of attempts made to 
install psychological methods in his special domain. 
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