Definition of tachistoscope in English:

tachistoscope

noun

  • An instrument used for exposing objects to the eye for a very brief measured period of time.

    • ‘The test required subjects to determine the identity of nonsense syllables presented in a tachistoscope when, unknown to the subjects, no syllables were present.’
    • ‘Participants were asked to look through the central eyepiece of the tachistoscope and fixate their eyes at the central point, following a ready signal.’
    • ‘We are not programmed to remember lists of numbers or nonwords, presented in isolation via a tachistoscope or a computer screen - the favoured method of ‘studying memory’ in the 1960s and 1970s.’
    • ‘An electronic tachistoscope capable of exposing photographs from 1 ms to 1000 ms was used.’

Origin

Late 19th century: from Greek takhistos swiftest + -scope.

Pronunciation:

tachistoscope

/taˈkɪstəˌskəʊp/