1 EMPLOYMENT PSYCHOLOGY 
German as well as American investigations, has disadvan- 
tages, but it is necessary if tests are given to shop operatives 
who for one reason or another cannot be taken far from 
their work. 
Below are some of the conditions which a room for indi- 
vidual testing should satisfy: 
Privacy should be assured. No one other than the ex- 
aminer and the subject should occupy the room at the time 
of testing. 
Freedom from interruption should be provided for. Rooms 
used for test purposes should not contain important material 
which must be referred to frequently. If the telephone 
proves annoying, the examiner may muffle it. 
The room should be relatively free from noise. 
It should be well lighted. 
It should not be too far from the place of work. 
It should be cleared of objects likely to distract attention. 
As far as possible the room should reproduce the condi- 
tions under which the man works, since unusual conditions 
are apt to provoke unusual responses. 
Suitable writing or working space should be provided for 
both examiner and subject. 
If the test calls for writing, the pencil, provided by the 
examiner, should be sharpened at both ends, in order to pre- 
vent the subject from wasting time during the test by eras- 
ing, or by attempting to sharpen a broken point. 
Use of a cumulative stop-watch which has a sliding lever 
near the stem is recommended, as it is noiseless in operation 
and allows the investigator to take time out for unforeseen 
interruptions or difficulties. The usual type of stop-watch 
springs back to zero after being stopped, and cannot be used 
for recording cumulative times. Decimal stop-watches and 
split-second stop-watches have their advantages for certain 
kinds of measurement. 
A small screen on the table is sometimes convenient so 
that the examiner may keep his tests out of sight, or record 
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