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 Appendix,
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 subject
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 minute
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
