Tachistoscope

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Tachistoscope \Ta*chis"to*scope\, n. [Gr. ta`chistos, superl. of
     tachy`s swift + -scope.] (Physiol.)
     An apparatus for exposing briefly to view a screen bearing
     letters or figures. It is used in studying the range of
     attention, or the power of distinguishing separate objects in
     a single impression.


     [Webster 1913 Suppl.]

From WordNet (r) 2.0 [wn]:

  tachistoscope
       n : scientific instrument used by psychologists; presents visual
           stimuli for brief exposures [syn: {t-scope}]