A FIRST EXPERIMENT 
2 9 
hole or any part of the brass plate, an electric contact 
was made which produced a click in a telephone receiver 
which the subject held to her ear. At the start of the 
test, the subject was instructed to put the brass pencil 
into each hole in succession until she heard a click in her 
ear, when she was to start all over again. The speed of 
the subject’s movements was controlled by a metronome 
set so as to allow thirty trials per minute. The experi 
menter also had a telephone receiver to enable him to 
follow the subject’s performance. The holes were num 
bered 1, 2, 3, etc., to 9. As soon as the subject failed to 
put the pointer squarely into a hole but touched the brass 
plate and produced a click, the experimenter recorded 
the number of the hole at which she had failed. This 
constituted one trial. Each girl was allowed fifteen such 
trials, and the numbers of the last ten were taken and 
averaged, the first five serving as preliminary practice. 
For instance, if a girl, in her first trial, reached the fourth 
hole and missed on the fifth, the number five was recorded; 
if she missed on the sixth, six was recorded, etc., until 
fifteen numbers had been taken. Then, the sum of the 
last ten trials divided by ten gave the average performance 
for the subject. The larger the average, the better the 
performance. This test occupied from two to three min 
utes. 
8. A modification of the Whipple steadiness test. This 
consisted of two brass bars, about 12 inches long, set 
so as to form a long, horizontal V. The subject was asked 
to take the brass pointer and pass it along between these 
two bars. The farther she went, the narrower became the 
space between the brass bars. As soon as the brass pointer 
touched one of the bars it produced a click in the tele 
phone receiver. The point at which this brass pointer