Accession Number:

AD0435544

Title:

THE EFFECTS OF TRANSIENT WEIGHTLESSNESS ON BRIGHTNESS DISCRIMINATION.

Descriptive Note:

Rept. for Apr-Aug 63,

Corporate Author:

CORNELL AERONAUTICAL LAB INC BUFFALO N Y

Personal Author(s):

Report Date:

1964-03-01

Pagination or Media Count:

17.0

Abstract:

Contrast thresholds of six semisupine, visually adapted subjects were obtained under short 10-15 sec. periods of weightlessness and under 1-G control conditions. The target, viewed binocularly, subtended 1.5 and the background 2.6. Three background luminance levels were used 0.03, 0.28 and 30.0 ft-L. The contrast required to detect the target was found to be slightly, but consistently, lower under the weightless condition than under the control, 1-G, condition. Under the weightless condition the contrast required to detect the target averaged 12.56 at 0.03 ft-L background luminance, 6.4 at 0.28 ft-L background luminance and 3.99 at 30.0 ft-L background luminance. The corresponding contrasts required under the control, 1-G, condition averaged 15.14, 7.05 and 4.45 respectively. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE