Effects of Hypoxia on Peripheral Visual Response to Dim Stimuli

Abstract

Response times (RT's) of 9 Ss were obtained for detection of 48 flash stimuli distributed throughout the visual field during 3 1/4 hour exposures to each of 4 hypoxia conditions (0, 13,000, 15,000, 17,000 feet equivalent elevation). The luminance of all stimuli were set in common at the detection threshold value for the visual periphery. RT's were impaired in direct relation to hypoxic exposure severity, the peak impairments occurring within 90 minutes followed by gradual recovery. Since the present results showed less impairment than previous data for brighter stimuli using the same task, it is concluded that stimulus contrast is more critical to peripheral signal detection than absolute stimulus luminance, particularly under hypoxia exposure.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1975
Accession Number
ADA019106

Entities

People

  • John L. Kobrick

Organizations

  • United States Army Research Institute of Environmental Medicine

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Analysis Of Variance
  • Applied Psychology
  • Boundaries
  • Brightness
  • Contrast
  • Data Analysis
  • Detection
  • Discrimination
  • Human Factors Engineering
  • Luminance
  • Peripheral Vision
  • Physiology
  • Psychology
  • Psychophysiology
  • Signal Detection
  • United States
  • Visual Perception

Fields of Study

  • Psychology

Readers

  • Auditory Neuroscience/Auditory Physiology.
  • Brain and Cognitive Science; Experimental Psychology; Cognitive Neuroscience
  • Human-Computer Interaction (HCI).