Naval Submarine Medical Research 1aboratory
نویسنده
چکیده
The ability of observers to accurately identify up to twenty different colors presented on a CRT screen was studied. The effect of set size on time to recall color-coded information was also investigated via a paired-associates paradigm in which each color was paired with a letter of the alphabet. On test trials the time between color presentation and the subject's verbal response with the appropriate letter were recorded. All twenty subjects were able to identify accurately all twenty colors. For sets of two through seven colors, increases in set size resulted in significant rises in time to recall. Subsequent increases in set sizes, up to twenty, resulted in little or no further increase in time to recall. The time to recall was also found to vary significantly to the different colors. Although no statistical differences were found among 16 of the 20 colors, the other 4 yielded significantly slower times to recall. Performance on this task did not correlate well with color differences that were measured by £E*. This may have resulted from the colors being presented on a luminous background rather than a completely dark screen. AE* was a poor indicator of time to recall as well as error rate during learning. Error rate and time to recall were found to be highly correlated.
منابع مشابه
Naval Submarine Medical Research Laboratory Naval Submarine Medical Center Groton, Connecticut 06340 Memorandum. Report 70-7 an Investigation of the Effects of a Helium-oxygen Breathing Mixture on Hearing in Naval Personnel
Hearing levels of three subjects were measured at 125, 1000 and 8000 Hertz while the subjects were breathing air and while breathing an 80%/20% mixture of helium and oxygen. No significant change in hearing levels which could be attributed to the effects of the gas breathed were detected during or following a thirty-minute period on helium-oxygen.
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The visual tasks aboard submarines can be analyzed according to the demand for visual acuity placed upon the men performing them. Such assessments have been made on several occasions in the past, in response to increasing shortages of manpower, and have often resulted in relaxation of standards. These studies are summarized, the rationale for current standards stated and other solutions to the ...
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