I think the
experimental psychologists called the thing a "plethysmograph."
Then he had an apparatus which measured association time. The
essential part of this instrument was the operation of a very
delicate stop-watch, and this duty was given to me. It was
nothing more nor less than measuring the time that elapsed
between his questions to her and her answers, while he recorded
the actual questions and answers and noted the results which I
worked out. Neither of us was unfamiliar with the process, for
when we were in college these instruments were just coming into
use in America. Kennedy had never let his particular branch of
science narrow him, but had made a practice of keeping abreast of
all the important discoveries and methods in other fields.
Besides, I had read articles about the chronoscope, the
plethysmograph, the sphygmograph, and others of the new
psychological instruments. Craig carried it off, however, as if
he did that sort of thing as an every-day employment.
"Now, Miss Bond," he said, and his voice was so reassuring and
persuasive that I could see she was not made even a shade more
nervous by our simple preparations, "the game--it is just like a
children's parlour game--is just this: I will say a word--take
'dog,' for instance. You are to answer back immediately the first
word that comes into your mind suggested by it--say 'cat.
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