The Perception of Light Signals: The Effect of the Number of Irrelevant Lights

Crawford, A.

doi:10.1080/00140136208930612

Cited by 33 publications

(17 citation statements)

References 2 publications

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“…The number of noise elements in the visual field decreases (Baker, Morris, & Steedman, 1960;Banks, Bodinger, & Illige, 1974;Brown and Monk, 1975;Cahill & Carter, 1976;Crawford, 1962;Eriksen & Eriksen, 1974;McIntyre, Fox, & Neale, 1970). …”

mentioning

confidence: 99%

Sign luminance requirements for various background complexities

Mace¹,

King²,

Dauber³

1984

PsycEXTRA Dataset

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mentioning

confidence: 99%

Sign luminance requirements for various background complexities

Mace¹,

King²,

Dauber³

1984

PsycEXTRA Dataset

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“…Proposals include the installation of additional hold-short lights, sequential and selective switching of taxiway lights, or the use of flashing lights to denote taxiway intersections. These proposals, however, all have major shortcomings regarding both financial and human factors considerations: The installation of additional lights increases the number of light signals on the airport and can lead to considerable confusion (Berkhout, 1979;Crawford, 1962;Douglas, 1978;Luria, Neri, Shim, & Bienvenour, 1991). The sequential switching of lights, on the other hand, is dependent upon the proper switching and setting of lights by an automated system or ground controller.…”

Section: The Effects Of Taxiway Light Geometry Color and Location Omentioning

confidence: 97%

The Effects of Taxiway Light Geometry, Color, and Location on Position Determination by Pilots

Jentsch

1994

Proceedings of the Human Factors and Ergonomics Society Annual

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Lack of perspective cues or abundance of lights in airport taxiway areas have been problems leading to pilot disorientation when navigating on the airport surface. Possible human factors solutions include the introduction of perspective cues through shaped lights and the reduction of extraneous light signals with shielded lights. Thirty-two pilots participated in a laboratory simulation to evaluate the effects of taxiway light geometry, color, and location on determination of position. Two new systems (shelded and shaped lights) were tested against two traditional systems (blue edge lights and green centerline lights). Subjects had to determine their position on an airport map from static, out-the-cockpit views. Contrary to expectations, the two new systems did not lead to improved performance over the traditional systems in this simulation. In fact, the pattern of means suggested that performance was better with the traditional systems than with the new ones. In the case of the number of correctly identified positions, these differences were sigtllficant. Subjects' confidence and their actual performance in position determination did not correlate. Implications for studies investigating airport surface navigation systems are discussed.

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“…In a task in which a stylus must be made to follow an irregular path through manipulation of two-hand wheels, decrements in performance for response time and the number of patterns completed within a specified time were found under conditions of exposure to narrow band noise (Grimaldi, 1958). Crawford (1962) concluded that the presence of irrelevant lights in the proximity of warning signals could be detrimental to an operator's efficiency. The aircrew member who is able to reject irrelevant or extraneous stimuli and readily adapt to the distracting conditions should be more proficient, other things being equal, than the member lacking the necessary facility.…”

Section: Critical Behavioral Functionsmentioning

confidence: 99%