Accession Number:

AD0686672

Title:

TWO-FLASH THRESHOLDS AS A FUNCTION OF FLASH LUMINANCE AND AREA,

Descriptive Note:

Corporate Author:

CIVIL AEROMEDICAL INST OKLAHOMA CITY OKLA

Personal Author(s):

Report Date:

1968-09-01

Pagination or Media Count:

10.0

Abstract:

The recent use of strobe lights in aviation suggests the possibility of using temporal patterns of short duration flashes as information-carrying signals. Under night flight conditions, two-flash thresholds were obtained using a two-interval, temporal forced-choice technique with foveally fixated circular targets varying in luminance and area. For all subjects the results replicated a previous finding that two-flash thresholds are a negatively accelerated function of flash luminance, but the function was shown to be dependent on area, a greater threshold change occurring at smaller areas. Two-flash thresholds were also found to be a decreasing function of stimulus area, with the greatest threshold change occurring at low luminances. Author

Subject Categories:

  • Terminal Flight Facilities
  • Anatomy and Physiology
  • Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE