an exercise in miscellany

Tachistoscope

In history, technology & innovatons on April 5, 2011 at 9:05 pm

A tachistoscope is a device that displays (usually by projecting) an image for a specific amount of time. It can be used to increase recognition speed, to show something too fast to be consciously recognized, or to test which elements of an image are memorable. Tachistoscopes use a slide or transparency projector equipped with the mechanical shutter system typical of a camera. Tachistoscopes were used extensively in psychological research to present visual stimuli for controlled durations. Some experiments employed pairs of tachistoscopes so that an experimental participant could be given different stimulation in each visual field. For example, used during World War II in the training of fighter pilots to help them identify aircraft silhouettes as friend or foe. Tachistoscopes continue to be used in market research, where they are typically used to compare the visual impact, or memorability of marketing materials or packaging designs.

via Tachistoscope

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