Document Detail

Protan Response Times to Red Lights in a Mildly Hypoxic Environment.
MedLine Citation:
PMID:  25329939     Owner:  NLM     Status:  Publisher    
PURPOSE: This study was conducted to determine whether protans have slower reaction times to red lights than individuals with normal color vision and to identify whether protan reaction times increase differentially in a mildly hypoxic environment.
METHODS: Simple reaction times (SRT) to a red light-emitting diode (LED) display were measured using the Psychomotor Vigilance Task (PVT) at ground (1293 ft/394 m), simulated 12,400-ft (3780-m) altitude, and 20 min after returning to ground. Subjects were 13 individuals with normal color vision (NCV), 12 with a deutan color vision defect, and 4 with a protan color vision defect.
RESULTS: The mean reaction times increased by 8% with altitude and decreased after returning to ground for all groups. However, the reaction times of the protans were often faster than the NCV mean and never below the NCV 10(th) percentile. The only significant difference between color vision groups was the slowest mean reaction time of the NCV group was slower than both the pooled dichromats and pooled anomalous trichromats across all conditions by 23%. The number of lapses did not vary with altitude, but the dichromatic subjects had significantly fewer lapses than the trichromatic subjects across all conditions.
CONCLUSION: Although protans may be slower to respond to some red warning lights, this decrement in performance could not be demonstrated under the conditions of our experiment. Furthermore, the protan group's simple reaction times were not differentially affected by mild hypoxia. These results suggest that the red LEDs were sufficiently bright for these protan observers.
Jeffery K Hovis; Nelda J Milburn; Thomas E Nesthus
Related Documents :
1502799 - Perceived direction of moving two-dimensional patterns depends on duration, contrast an...
25215639 - Photothermally triggered fast responding hydrogels incorporating hydrophobic moiety for...
16562639 - An oral tactile interface for blind navigation.
12696859 - Tilt aftereffects generated by symmetrical dot patterns with two or four axes of symmetry.
23294769 - Simultaneous noninvasive clinical measurement of lens autofluorescence and rayleigh sca...
10828469 - The dependence of motion repulsion and rivalry on the distance between moving elements.
21087549 - Microphotometry of underwater shadowing by a moss from a niagara escarpment waterfall.
8006819 - Stretch reflex responses in the human elbow joint during a voluntary movement.
17835929 - Light pollution: outdoor lighting is a growing threat to astronomy.
Publication Detail:
Journal Detail:
Title:  Aviation, space, and environmental medicine     Volume:  85     ISSN:  0095-6562     ISO Abbreviation:  Aviat Space Environ Med     Publication Date:  2014 Nov 
Date Detail:
Created Date:  2014-10-20     Completed Date:  -     Revised Date:  2014-10-21    
Medline Journal Info:
Nlm Unique ID:  7501714     Medline TA:  Aviat Space Environ Med     Country:  -    
Other Details:
Languages:  ENG     Pagination:  1078-1085     Citation Subset:  -    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Inferior G Protection with an Electrical Muscle Stimulation Suit Compared to a Standard G-Suit.
Next Document:  Free Fatty Acids Do Not Influence Venous Gas Embolism in Divers.