The slowing of visual processing by hypoxia

Article Abstract:

An experiment was conducted to ascertain whether hypoxia retards visual processing. Fourteen subjects breathed in a low oxygen mixture that generated arterial oxyhemoglobin saturations from 64-66 percent. Hypoxia was found to disrupt light intensity that retards visual processing which is a function of response time. A possible explanation is that hypoxia minimized the effective stimulus intensity and visual contrast. This is congruous to the anatomical evidence that hypoxia affects retinal sensitivity. Large light intensity and hypoxia interaction signify slow visual functioning.

Physiological aspects, Vision disorders, Human information processing, Cerebral anoxia

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Diagnosis of fault location using polygon displays

Article Abstract:

Polygon displays are effective as global warning indicators rather than for displaying individual parameters that require separate assessment. The displays are useful when the task involves only the identification of abnormal vertices. However, in polygon displays involving the determination of the location of the abnormal vertices, the reaction time (RT) is proportional to the number of vertices. An increase in the irregularity of the polygons also increases the RT.

Pattern recognition, Pattern recognition (Computers), Visual perception

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Effects of mild hypoxia on perceptual-motor performance: a signal-detection approach

Article Abstract:

Performance on a signal detection task concerning the orientation of visual stimuli while breathing air at reduced partial pressure in a hypobaric chamber was measured. At altitudes of 7000 to 12,000 ft perceptual-motor performance indicated lower response time at these heights relative to sea level. The accuracy of judgement was worse at 12,000 ft. Response criterion was not affected by oxygen deprivation.

Measurement, Hypoxia, Anoxia, Altitude, Influence of, Signal detection (Psychology)

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