Multiple Choice
Which piece of experimental apparatus did James McKeen Cattell invent?
A) a clock rigged to make a sound when its pendulum reached its farthest swing
B) a lip-key used to help record reaction times for verbal responses
C) a series of embedded figures that cannot be perceived by color blind subjects
D) a "tachistoscope" that presented stimuli to subjects for just small fractions of a second
Correct Answer:

Verified
Correct Answer:
Verified
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