THE INTENSITY-TIME RELATIONSHIP FOR FORM IDENTIFICATION.
Final technical rept.,
ROME AIR DEVELOPMENT CENTER GRIFFISS AFB N Y
Pagination or Media Count:
The purpose of the experiment was to determine the effect of exposure time and intensity on a form identification response such as might be encountered in a military Command and Control display situation. A conventional psychophysical method was used to determine the applicability of the Bunsen-Roscoe Law Intensity x Time a Constant up to a critical duration and Intensity a Constant above a critical duration. Exposure time thresholds were found for three subjects for each of five geometric forms at each of five intensities ranging in value from .005 to 1 foot-lambert. It was found that the Bunsen-Roscoe Law did not hold, but that time was a more important factor than intensity in identifying the forms. The results are discussed in terms of detection vs identification of stimuli, and implications for Command and Control display requirements are pointed out. Author