Which Piece of Experimental Apparatus Did James McKeen Cattell Invent

question 73

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

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