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LUMINANCE REINTENSIFICATION AT FREQUENCIES FROM 40 TO 300 CYCLES PER SECOND AS A FACTOR IN THE READING OF SIMULATED VISUAL DISPLAYS
TUFTS UNIV MEDFORD MASS INST FOR PSYCHOLOGICAL RESEARCH
Pagination or Media Count:
IF A VISUAL DISPLAY IS PERIODICALLY REINTENSIFIED AT A FREQUENCY ABOVE A CERTAIN CRITICAL VALUE, NO FLICKER WILL BE PERCEIVED WITH STEADY EYE FIXATION, BUT DURING EYE MOVEMENT A SERIES OF SPACED IMAGES MAY APPEAR. The effect of this phenomenon on the reading of displays was investigated. Several types of display material were used, and the following conditions were varied luminance level, luminance contrast, uniformity of luminance among display elements, color, size of characters in the display, spatial extent of display, and frequency, wave form and duty cycle of the periodic reintensification. From a series of experiments, it can be concluded that reintensification above the critical frequency of flicker creates no significant problem for the reading of visual displays. Author
APPROVED FOR PUBLIC RELEASE