ta·chis·to·scope

[tuh-kis-tuh-skohp]
noun Psychology.
an apparatus for use in exposing visual stimuli, as pictures, letters, or words, for an extremely brief period, used chiefly to assess visual perception or to increase reading speed.

Origin:
1905–10; < Greek táchist(os), superlative of tachýs swift + -o- + scope

ta·chis·to·scop·ic [tuh-kis-tuh-skop-ik] , adjective
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
tachistoscope (təˈkɪstəˌskəʊp) [Click for IPA pronunciation guide]
 
n
an instrument, used mainly in experiments on perception and memory, for displaying visual images for very brief intervals, usually a fraction of a second
 
[C20: from Greek takhistos swiftest (see tachy-) + -scope]
 
tachistoscopic
 
adj
 
tachisto'scopically
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Tachistoscope is always a great word to know.
So is gobo. Does it mean:
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
American Heritage
Medical Dictionary

tachistoscope ta·chis·to·scope (tā-kĭs'tə-skōp', tə-)
n.
An apparatus that projects a series of images onto a screen at rapid speed to test visual perception, memory, and learning.


ta·chis'to·scop'ic (-skŏp'ĭk) adj.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
None of the visual skills instructors reported using strobe techniques, a tachistoscope, or a slide projector.
The way this is measured is with an apparatus called a tachistoscope.
His visual perceptual span can be measured with a tachistoscope.
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