THE EFFECTS OF TRANSIENT WEIGHTLESSNESS ON BRIGHTNESS DISCRIMINATION.

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)

Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1964
Accession Number
AD0435544

Entities

People

  • W. White

Organizations

  • Calspan

Tags

DTIC Thesaurus Topics

  • Brightness
  • Contrast
  • Discrimination
  • Luminance
  • Motor Skills
  • Optical Properties
  • Physical Properties
  • Psychological Phenomena And Processes
  • Weightlessness

Readers

  • Brain and Cognitive Science; Experimental Psychology; Cognitive Neuroscience
  • Image Processing and Computer Vision.