Measuring Discomfort from Glare: Recommendations for Good Practice

Fotios, Steve; Kent, Michael

doi:10.1080/15502724.2020.1803082

Cited by 34 publications

(25 citation statements)

References 96 publications

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“…Only one participant was scheduled at a time. The formal experiment always started with a 5 min common “pre-lighting” stage (300 lx at 4000 K at eye level) for light adaption, which has been documented to have an influence on subjective evaluations given to lighting conditions that immediately follow [ 55 , 56 , 57 ]. After the light adaptation phase, the light was changed either to the dim illuminance or the bright illuminance.…”

Section: Methodsmentioning

confidence: 99%

Effects of Ambient Illuminance on Explicit and Implicit Altruism: The Mediation Roles of Perceived Anonymity and Satisfaction with Light

Luojin

et al. 2022

IJERPH

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Ambient light plays a key role in social interactions, and the effects of ambient light on explicit altruism have been widely documented. However, whether ambient light affects implicit altruism and the potential mechanisms underlying the effect remain largely unknown. The current study aimed to explore the effects of ambient illuminance on explicit and implicit altruism simultaneously, and to determine the potential mediation role of subjective mood, state self-control perceived anonymity and satisfaction with light. A one-factor (Illuminance: dim (100 lx) vs. bright (1000 lx) at eye level), between-subjects design was employed in the current study, during which seventy-eight undergraduates (52 females, 18–25 years old) were assigned to two groups, with participants in each group undergoing both the dictator game assessing explicit altruism and the implicit association test (IAT) assessing implicit altruism under one of two illuminance conditions. Meanwhile, subjective mood, state self-control, perceived anonymity and satisfaction with light were also assessed with questionnaires at the beginning or/and at the end of the experiment. Results revealed that participants tended to allocate more money in the dictator game and showed a higher state self-control, satisfaction with light and lower perceived anonymity under bright versus dim illuminance condition, whereas the performance in IAT and subjective mood revealed no statistically significant effects of illuminance. The promoting effect of bright illuminance on explicit altruism was partially mediated by perceived anonymity and satisfaction with light, but not by state self-control. These findings suggest that ambient light holds the potential to regulate psychological well-being and thus facilitate prosocial behavior, but such benefits are dependent on the type of task.

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Section: Methodsmentioning

confidence: 99%

Effects of Ambient Illuminance on Explicit and Implicit Altruism: The Mediation Roles of Perceived Anonymity and Satisfaction with Light

Luojin

et al. 2022

IJERPH

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“…In addition to the subjective psychophysical approaches that have been common in discomfort glare research, advances in various physiological and other measurement techniques show promise for documenting the effect of glare sources on humans [32,33]. Fotios and Kent provide a summary of past studies that have measured discomfort using methods other than subjective psychophysical procedures [34]. Such methods include measuring changes in pupil size, electrograms using techniques such as electromyography (EMG), extent of eye opening, brain activity such as that measured through functional magnetic resonance imaging (fMRI), gaze behavior, and behavioral responses such as closing window blinds or changing seating positions and view direction.…”

Section: Test Procedures For Discomfort Glare Researchmentioning

confidence: 99%

Achieving Integrated Daylighting and Electric Lighting Systems: Current State of the Art and Needed Research

Thomson¹,

Davis

Fernandes

et al. 2021

Energies

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This paper presents the results of a multi-disciplinary effort to clarify the state of the art and the state of practice, and necessary future research for creating the seamless integration and application of light in buildings, regardless of source, which is purposely modulated to illuminate surfaces and designed in a way that is comfortable, healthy, pleasing, cost-effective, and energy efficient. The authors unwrap the research, tools, and technical gaps preventing the full integration of electric lighting and daylighting with advanced façades through the coordination of lighting and windows research activities. The study and a stakeholder workshop captured current technology readiness levels (TRL), as well as research thrusts and implementation guidelines, and identified research priorities, presenting an analysis of the current landscape of lighting metrics—and which metrics are in the critical path for developing integrated daylighting and electric lighting systems, and their design, installation, and technology guidelines. In addition, the study defined stakeholder coordination, pathways to interoperable technology, and the value of viewing the work of the individual research areas holistically rather than in isolation.

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“…Nevertheless, these results showed that care is required when glare is evaluated using the category rating procedure. 7 Subjective evaluations can also be influenced by the range bias effect. 5 Range bias is a phenomena where the range of stimuli available influence the threshold values at which subjective evaluations occur -as stimuli maxima increase, the values at which subjective criteria such as visual discomfort are assessed also increase.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, these results showed that care is required when glare is evaluated using the category rating procedure. 7…”

Section: Introductionmentioning

confidence: 99%

An examination of range effects when evaluating discomfort due to glare in Singaporean buildings

Kent

Jakubiec

2021

Lighting Research & Technology

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This article discusses ratings of visual discomfort from glare across different buildings located in Singapore. These data were used to determine if range effects influence the vertical illuminance values for the same ratings of visual discomfort when the category rating procedure is used. The effect occurs when maxima and minima vertical illuminance (i.e. the range) vary across buildings. Our analyses showed that with a higher vertical illuminance range in a building, the mean vertical illuminance value for the same criterion of visual discomfort also increased. The results suggest that the effect caused by different ranges of measured vertical illuminance present across the buildings biased the ratings of visual discomfort. Although these effects may be unavoidable in some buildings that have vastly different levels of light, the data suggest that the overall range of vertical illuminance must be carefully evaluated when predicting visual discomfort. Matching these conditions may enable vertical illuminance to provide more reliable evaluations of discomfort due to glare.

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Measuring Discomfort from Glare: Recommendations for Good Practice

Cited by 34 publications

References 96 publications

Effects of Ambient Illuminance on Explicit and Implicit Altruism: The Mediation Roles of Perceived Anonymity and Satisfaction with Light

Effects of Ambient Illuminance on Explicit and Implicit Altruism: The Mediation Roles of Perceived Anonymity and Satisfaction with Light

Achieving Integrated Daylighting and Electric Lighting Systems: Current State of the Art and Needed Research

An examination of range effects when evaluating discomfort due to glare in Singaporean buildings

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