tachistoscope
noun;
an instrument used in psychology that flashes a series of images in front of the test subject as quickly as possible in an attempt to test memory for different stimuli. "In my day, we used tachistoscopes to test memory, but now we use computers instead."
Etymology : Tachistoscope. Gr. tachys ‘fast, quick’ + scope ‘to view’
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Last modified: 10 June 2008