The very
favorable results which this method had yielded in the classroom made
me decide to try it in this case too. I chose for an experiment 24
pairs of words from the sphere of experience of the girls to be
tested. Two further class experiments belonged rather to the periphery
of psychology. The exactitude of space-perception was measured by
demanding that each divide first the long and then the short edge of a
folio sheet into two equal halves by a pencil mark. And finally, to
measure the rapidity of movement, it was demanded that every one make
with a pencil on the paper zigzag movements of a particular size
during the ten seconds from one signal to another.
After these class experiments I turned to individual tests. First,
every girl had to sort a pack of 48 cards into 4 piles as quickly as
possible. The time was measured in fifths of a second. The following
experiment which referred to the accuracy of movement impulses
demanded that every one try to reach with the point of a pencil 3
different points on the table in the rhythm of metronome beats. On
each of these three places a sheet of paper was fixed with a fine
cross in the middle. The pencil should hit the crossing point, and the
marks on the paper indicated how far the movement had fallen short of
the goal. One of these movements demanded the full extension of the
arm and the other two had to be made with half-bent arm.
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