Landolt-C Recognition in Elderly Subjects is Affected by Scotopic Intensity of Surround Illuminants

Berman, S.M.; Fein, George; Jewett, Don L.; Ashford, F.

doi:10.1080/00994480.1994.10748086

Cited by 24 publications

(27 citation statements)

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“…There was no correlation between pupil size and performance in the initial studies (Berman et al 1993(Berman et al 1994. Fotios and Levermore (1995) also found improved visual performance under a white incandescent lamp with a high colour temperature (stronger blue component than a regular incandescent lamp), but the size of the effect was not consistent with a prediction based on Berman's theory.…”

Section: Visual Performancementioning

confidence: 79%

“…Performance was greater for the bluegreen lamp than for the red/pink combination, which is consistent with the theory. These effects were replicated with older subjects (61-66 years of age), although the effect sizes were smaller (Berman, Fein, Jewett and Ashford 1994). The effect was eliminated when pupil size was controlled using Mydriacyl eyedrops, and enhanced when participants with natural pupils wore glasses that blurred the stimulus .…”

Section: Visual Performancementioning

confidence: 83%

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A critical examination of perceptual and cognitive effects attributed to full-spectrum fluorescent lighting

Veitch¹,

McColl

2001

Ergonomics

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/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10.1080/00140130010002008Ergonomics, 44, 3, pp. 255-279, 2001-02-01 A Critical examination of perceptual and cognitive effects attributed to full-spectrum fluorescent lightingA Critical examination of perceptual and cognitive effects attributed to full-spectrum fluorescent lighting Veitch, J. A.; McColl, S. L.A version of this paper is published in / Une version de ce document se trouve dans : Ergonomics, v. 44, no. 3, Feb. 2001, pp. 255-279 www.nrc.ca/irc/ircpubs NRCC-42840Veitch AbstractFull-spectrum fluorescent lighting has been credited with causing dramatic improvements in vision, perception, and cognitive performance, as compared to other fluorescent lamp types. These effects are hypothesised to occur because of similarity between FSFL emissions and daylight, which is said to have evolutionary superiority over other light sources. This review, covering the period 1945-1998, critically considers the evidence for these claims. In general, poor-quality research has resulted in an absence of simple deterministic effects that can be confidently attributed to fluorescent lamp type. Promising avenues for lighting-behaviour research include investigations of cognitive mediators of lighting-behaviour relationships, and flicker rates and colour rendering effects on visual processing, appearance judgements, and affect. Good lighting solutions are more complex than lamp type specification.

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Section: Visual Performancementioning

confidence: 79%

Section: Visual Performancementioning

confidence: 83%

A critical examination of perceptual and cognitive effects attributed to full-spectrum fluorescent lighting

Veitch¹,

McColl

2001

Ergonomics

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“…There was no correlation between pupil size and performance. 45 Moreover, other researchers have failed to find similar results.…”

Section: -31mentioning

confidence: 98%

“…These effects were replicated with older subjects (61-66 years of age), although the effect sizes were smaller. 45 The results from Berman's experiments are consistent, but it is not clear that pupil size is the mediating mechanism for the enhanced visual performance with the scotopically-enhanced lamps. There was no correlation between pupil size and performance.…”

Section: -31mentioning

confidence: 98%

Lighting Quality Contributions from Biopsychological Processes

Veitch

2001

Journal of the Illuminating Engineering Society

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/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. Society, 30, 1, pp. 3-16, 2001-04-01 Lighting quality contributions from biopsychological processes Veitch, J. A. Journal of the Illuminating Engineering Lighting quality contributions from biopsychological processes Veitch, J.A.A version of this paper is published in / Une version de ce document se trouve dans :Journal of the Illuminating Engineering Society, v. 30, no. 1, 2001, pp. 3-16 www.nrc.ca/irc/ircpubs NRCC-42468© AbstractInternal processes, both biological and psychological, are thought to mediate the relationships between luminous conditions and such behavioral outcomes as task performance, mood, social behavior, aesthetic judgements and satisfaction. This review paper summarizes the state of knowledge concerning mediating biopsychological processes: visibility, photobiology, and stress and arousal. Visibility is well-understood and obviously relevant to lighting practice. Photobiology, however, is a new entrant to the realm of lighting research; its findings could have important implications for recommended illuminance levels if these were based on more than visibility. Stress and arousal, interrelated concepts, are popular notions, but close examination reveals only weak support for these mechanisms as explanations of lighting effects on behavior. The improved organization of research and increased predictive power that would result from clear exposition of theoretical mechanisms in lighting research holds promise for progress in linking research and application.Lighting Quality and Biopsychology / 2 Introduction Renewed interest in lighting quality emerged in the early 1990s, in parallel with the development of energy codes and standards. Lighting practitioners remembered the energy conservation strategies of the 1970s energy crisis, in which delamping reduced overall light levels and produced uneven distributions of light. Energy was saved, but lighting quality declined. Lighting designers of the day decried this simplistic approach to conservation and feared that similar strategies would occur again.1-3 Committees were struck by the major associations, and many conference sessions on lighting quality were convened.The definition of lighting quality most widely adopted in these discussions has been an emergent one, in which lighting quality is the degree of excellence achieved, in terms of meeting human needs 4 and integration of these outcomes with energy conservation and architecture.5 Veitch and Newsham...

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“…As an example, in one visual test subjects must identify the location of an open section in a circle (called a Landolt C) that is briefly shown on a computer monitor. Many of these studies have identified statistically significant differences in people's performance on these visual tests with changes in lighting (e.g., Berman et al, 1993Berman et al, ,1994NEMA, 1989); however, the relationship between performance in these visually demanding laboratory tests and performance in typical work (e.g., office work) remains unclear.…”

Section: Direct Impacts Of Indoor Environments On Human Performancementioning

confidence: 99%

Estimates of Improved Productivity and Health from Better Indoor Environments

Fisk¹,

1997

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The existing literature contains strong evidence that characteristics of buildings and indoor environments significantly influence rates of respiratory disease, allergy and asthma symptoms, sick building symptoms, and worker performance. Theoretical considerations, and limited empirical data, suggest that existing technologies and procedures can improve indoor environments in a manner that significantly increases health and productivity. At present, we can develop only crude estimates of the magnitude of productivity gains that may be obtained by providing better indoor environments; however, the projected gains are very large. For the U.S., we estimate potential annual savings and productivity gains of $6 billion to $19 billion from reduced respiratory disease; $1 billion to $4 billion from reduced allergies and asthma, $10 billion to $20 billion from reduced sick building syndrome symptoms, and $12 billion to $125 billion from direct improvements in worker performance that are unrelated to health. Sample calculations indicate that the potential financial benefits of improving indoor environments exceed costs by a factor of 18 to 47. The policy implications of the findings are discussed and include a recommendation for additional research.

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Landolt-C Recognition in Elderly Subjects is Affected by Scotopic Intensity of Surround Illuminants

Cited by 24 publications

References 1 publication

A critical examination of perceptual and cognitive effects attributed to full-spectrum fluorescent lighting

A critical examination of perceptual and cognitive effects attributed to full-spectrum fluorescent lighting

Lighting Quality Contributions from Biopsychological Processes

Estimates of Improved Productivity and Health from Better Indoor Environments

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