“An electronic tachistoscope capable of exposing photographs from 1 ms to 1000 ms was used.”
“Participants were asked to look through the central eyepiece of the tachistoscope and fixate their eyes at the central point, following a ready signal.”
“The test required subjects to determine the identity of nonsense syllables presented in a tachistoscope when, unknown to the subjects, no syllables were present.”
tachistoscopy
The use of a tachistoscope to gauge image recognition, etc.
