Jennifer A. Veitch

Jennifer A. Veitch
National Research Council Canada | NRC · Institute for Research in Construction (IRC)

Ph.D.

About

274
Publications
118,695
Reads
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6,231
Citations
Introduction
Visit the NRC Publications Archive at https://nrc-publications.canada.ca/eng/home/ to obtain full-text documents for my research. I don't respond to requests on ResearchGate.
Additional affiliations
January 1992 - June 2022
National Research Council Canada
Position
  • Principal Research Officer
Description
  • My focus at the moment is on how to get the most benefit out of the solid-state lighting revolution by using the novel capabilities of these sources to make more interesting, beautiful, and healthful places that are also more energy-efficient.
May 1991 - September 1991
University of Victoria
Position
  • Sessional Lecturer

Publications

Publications (274)
Article
Full-text available
Light exposure has a profound impact on human physiology and behaviour. For example, light exposure at the wrong time can disrupt our circadian rhythms and acutely suppress the production of melatonin. In turn, appropriately timed light exposure can support circadian photoentrainment. Beginning with the discovery that melatonin production is acutel...
Conference Paper
The higher the colour fidelity of a light source, the lower its luminous efficacy of radiation because the light source spectrum must deviate from V(λ) to deliver the higher fidelity. Two experiments probed the trade-off between energy efficiency and colour quality. Experiment 1 required participants to simultaneously view pairs of light sources di...
Article
Full-text available
Well-being in the built environment is a topic that features frequently in building standards and certification schemes, in scholarly articles and in the general press. However, despite this surge in attention, there are still many questions on how to effectively design, measure, and nurture well-being in the built environment. Bringing together ex...
Technical Report
Full-text available
Final Report for a research project that examined visual perception associated with temporal light modulation, and more specifically the stroboscopic effect.
Article
Full-text available
The advent of LED lighting has renewed concern about the possible visual, neurobiological, and performance and cognition effects of cyclic variations in lighting system luminous flux (temporal light modulation). The stroboscopic visibility measure (SVM) characterises the temporal light modulation signal to predict the visibility of the stroboscopic...
Chapter
https://ecampusontario.pressbooks.pub/psychologycareers/chapter/chapter-13-environmental-psychology/
Article
Full-text available
The judgment of thermal comfort is a cognitive process which is influenced by physical, psychological and other factors. Prior studies have shown that occupants, who are generally satisfied with many non-thermal conditions of indoor environmental quality, are more likely to be satisfied with thermal conditions as well. This paper presents a novel a...
Article
‘Better buildings’ are intended to improve employee well-being and other important organizational productivity metrics, but such effects have been notoriously difficult to quantify convincingly. This paper uses new, multi-metric approaches to develop a framework for valuing these effects. The organizational productivity metrics considered are: abse...
Article
Applied lighting research is inherently interdisciplinary. Any one study in which investigators seek to understand the effects of light may involve expertise drawn from fields as varied as psychology, physiology, photobiology, vision science, engineering, physics, horticulture, and architecture. Despite differences in the specifics of research meth...
Article
Lighting on demand (LOD) is a high-resolution energy-efficient lighting control technique that dynamically adjusts the lights in a space according to its occupancy. It controls the lights in the space individually such that the area that receives a higher light level is determined by the location of the occupant(s) and, in some cases, by their task...
Article
Full-text available
There is increasing interest in understanding how office accommodation affects organizational productivity. Data on metrics of engagement, job satisfaction, job performance and facility complaints for thousands of employees (n = 14,569) of a large Canadian financial organization were analysed to explore differences in outcomes between those working...
Technical Report
Although light is defined as electromagnetic radiation that provides the stimulus for vision, we now know conclusively that ocular detection of this signal also has many other physiological and psychological effects in humans and other organisms. This knowledge has led some to argue for rapid adoption of lighting recommendations that incorporate “l...
Article
Both lighting technology and our understanding of the relationship between light and human health have advanced rapidly in recent years. The latter needs to be carefully evaluated, particularly as longer‐lasting light sources enter the market.
Article
Full-text available
For many people, the correct perception of the colors of objects is an important part of life, and today it is being threatened by misinformed policy-making and associated business decisions.Some conservationists and lamp manufacturers have concluded that the accurate color rendering provided by ordinary incandescent lamps is an unaffordable luxury...
Article
Two large and detailed field studies of the effect of office environment parameters on aspects of environmental and job satisfaction were conducted. The first study focused on open-plan offices in nine conventional buildings, whereas the second encompassed open-plan and private offices in 24 buildings (12 green and 12 conventional). The data collec...
Article
As light-emitting diode (LED) light sources mature, lighting designers will be able to deliver white light with a variety of spectral power distributions and a variety of color rendering properties. This experiment examined the effects of three spectral power distributions (SPDs) that were matched in illuminance and chromaticity on three measures o...
Conference Paper
A flickering light source resolves into a continuous perception (critical flicker frequency, CFF) at -60-100 Hz but at higher frequencies has neural effects that are not consciously reportable . We do not know the frequency of the upper limit of detection , but electroretinogram data show responses as high as 200 Hz. Visual performance and eye move...
Article
Previous research has demonstrated that individual personal control over light level benefits individuals and organizations. As a first step toward testing whether light source spectrum choices—which are possible with light emitting diode (LED) systems—offer similar benefits, we examined preferences for various spectra in a scale model of an office...
Article
Full-text available
Fundamental research into the effects of light on biology, behavior, and health is a rapidly-advancing field. As the lighting community learns more about these research results, interest in potential lighting applications is growing. This paper sets out issues for consideration in three areas: research areas in which knowledge is needed; topics tha...
Article
Full-text available
40 participants viewed a series of greyscale images of a typical non-daylit, open-plan partitioned office, and rated them for attractiveness. The image was projected onto a screen at realistic luminances and 54% of full size. The images in the series were geometrically identical, but the luminances of important surfaces were independently manipulat...
Article
Veitch and Newsham proposed a behaviorally-based model for lighting quality research, in which individually-based processes 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 concerni...
Article
The Smithsonian's National Museum of American History (NMAH) has embarked on a three-year project to preserve the Star-Spangled Banner Flag. The project consisted of using infrared spectrometry to analyze small samples of the flag's fibers and a National Aeronautics and Space Administration (NASA) camera capable of photographing large areas to dete...
Article
Full-text available
Illuminating engineers, lighting designers and others have long debated the importance of providing an artificial light source that mimics the characteristics of natural light. Several products are available that purport to provide more natural light, of which retrofit plastic filters are one. Product testimonials praising these products abound, bu...
Article
Full-text available
Organisations and their facilities managers are under pressure to reduce the space allocation to individuals in open-plan offices, as a means to reduce costs. The reduced space allocation, however, risks creating an unpleasant working environment, either directly through the creation of adverse physical conditions (e.g., more noise, added obstructi...
Article
This paper describes the factor structure of an office environmental satisfaction measure and develops a model linking environmental and job satisfaction. The data were collected as part of the Cost-effective Open-Plan Environments (COPE) project, in a field study that also included local physical measurements of each participant's workstation. The...
Article
A post-occupancy evaluation (POE) of 12 green and 12 conventional office buildings across Canada and the northern United States was conducted. Occupants (N = 2545) completed an online questionnaire related to environmental satisfaction, job satisfaction and organizational commitment, health and well-being, environmental attitudes, and commuting. In...
Article
Full-text available
Among those concerned with practical matters of office design, demonstrations that the work environment affects employees’ well-being and work behaviors are thought to be important to support client decision making. Veitch, Newsham, Boyce, and Jones developed a conceptual model in which lighting appraisal and visual capabilities predicted aesthetic...
Article
The rewards for service to a professional association are many: reputation-building, power, and influence; skill development; networking opportunities; feelings of mastery and belonging. These serve to maintain the behaviours despite occasional dull or routine tasks required in the service role. Voluntary service of this kind is essential to the ma...
Conference Paper
Full-text available
Our common experience is that windows are desirable; in recent years science has begun to explain why. The last reviews of this literature were published a decade ago; therefore, we felt the time to be right for a comprehensive review and for the development of a research agenda to move activity forward in directions that would have practical appli...
Technical Report
This survey is one task under the NRC-IRC project “Development of Guidelines for Effective Solar Shadings of Residential Windows for Energy Efficiency and Occupant Comfort” (44-B3243). The purpose of this project is to develop guidelines for the use of internal reflective, mid-pane, and external insulating solar shadings on residential windows to r...
Article
Full-text available
Background LED (Light Emitting Diode) based lighting has been predicted to reach as much as 60% share of the global lighting market in the next 10 years. It is characterized by exceptional lifetime and excellent energy efficiency. However potential health concerns have been associated with flicker in some LED lighting technologies. Aims/Objectives/...
Technical Report
A 2004 CIE report introduced the concept of a necessary daily light dose that contemporary life in industrialized countries does not deliver, but to which better use of architectural daylighting could make a valuable contribution. Nearly a decade has passed since the last substantive reviews of the health and well-being effects of daylight and wind...
Technical Report
A comprehensive post-occupancy investigation of the performance of “green” and “conventional” office buildings has been completed. The study included occupant surveys and physical building and energy use data collected from 24 buildings (12 green, 12 conventional) across Canada and the northern US. Occupants completed a questionnaire with items rel...
Technical Report
Une étude exhaustive de la performance des immeubles de bureaux « verts » ou écologiques par rapport aux immeubles dits « conventionnels » a été réalisée, une fois les bâtiments occupés. L’étude en question comprenait des enquêtes auprès des occupants, ainsi que des données sur les caractéristiques physiques des bâtiments et leur consommation d’éne...
Conference Paper
Full-text available
For solid-state lighting to make a major dent in the lighting energy budget will require light sources and luminaires that are more efficacious than the existing technology, and a reason for building owners and tenants to change to an initially expensive, new and unfamiliar technology. New luminaire designs and operation modes using the unique char...
Article
Full-text available
People spend much of their waking time in their workplaces (approximately 33% on a weekly basis), which raises the possibility that the conditions they experience at work influence their health and well-being. The workplace design literature has given scant attention to mental health outcomes, instead focusing on healthy populations. Conversely, th...
Article
Office employees spend a lot of time inside buildings, where the physical conditions influence their well-being and indirectly influence their employers' business performance. With data from a field study conducted in the Netherlands in April to May 2003, we used path analysis to further elucidate the relationship between personal (gender and seaso...
Conference Paper
Full-text available
The IEEE Standards Working Group, IEEE PAR1789 “Recommending practices for modulating current in High Brightness LEDs for mitigating health risks to viewers” has been formed to advise the lighting industry, ANSI/NEMA, IEC, EnergyStar and other standards groups about the emerging concern of flicker in LED lighting. This paper introduces power electr...
Article
Full-text available
Thirty-nine participants viewed six interior scenes in an office/laboratory building and rated them for brightness, uniformity, pleasantness, and glare. The scenes were viewed in three presentation modes: participants saw the real space, and images of the spaces on a 17-inch computer monitor in both conventional and high dynamic range (HDR) mode. H...
Technical Report
This was a naturally-occurring field experiment, comparing employee responses to recessed parabolic-louvered luminaires, and workstation-specific individually-controllable suspended direct/indirect luminaires, with some variation in furnishings and surface reflectances. All occupants of three buildings were invited to complete an online questionnai...
Article
Full-text available
This paper suggests a new method of objectively deriving illuminance recommendations for VDT offices. An experiment in a mock-up office space gave occupants control over dimmable lighting circuits after a day working under constant, pseudo-random lighting conditions (for example, desktop illuminance during the day varied between 100 to 700 lux). Da...
Article
As part of ongoing lighting quality research, lighting experts in design and research were given the opportunity to judge the lighting quality of nine lighting designs for a windowless open-plan office. The nine lighting conditions are defined by a 3 x 3 matrix of levels of lighting power density and lighting quality as defined by designers (design...
Article
Full-text available
In the late 1990s, CIE began to shift its emphasis from lighting for visibility to a more broad definition of lighting quality, encompassing human needs, architectural integration, and economic constraints (including energy) [41]. Human needs, as defined here, include lighting that is appropriate to maintain good health, as well as lighting for vis...
Article
Full-text available
Office employees spend a lot of time inside buildings, where the physical conditions influence their well-being and indirectly influence their employers? business performance. With data from a field study conducted in the Netherlands in April-May 2003, we used path analysis to further elucidate the relationship between personal (gender and seasonal...
Article
Full-text available
The prospect of installing energy efficiency measures in buildings leaves some people afraid that they will ?freeze in the dark?. Surveys of employers show that they are reluctant to make changes that they fear could adversely affect employee performance and satisfaction. Fortunately, present-day technology exists that can satisfy occupants and the...
Article
Full-text available
We conducted a field study in a deep-plan office building with cubicle accommodation and large windows. Workstation-specific suspended direct-indirect (WSDI-C) luminaires with occupancy sensors, daylight-linked dimming, and individual controls were located centrally in each workstation provided lighting over most of the floor area. Part of one floo...
Article
Full-text available
Physical and questionnaire data were collected from 95 workstations at an open-plan office building in Michigan, US. The physical measurements encompassed thermal, lighting, and acoustic variables, furniture dimensions, and an assessment of potential exterior view. Occupants answered a detailed questionnaire concerning their environmental and job s...
Article
Full-text available
Participants (N=126) spent a day in a full-scale office laboratory, completing questionnaires and standard office tasks. Some participants experienced typical constant lighting and ventilation conditions, whereas others were given personal control over the dimming of lighting in their workstation and over the flow rate of air from a ceiling-based n...
Article
Full-text available
Canadians spend most of their time indoors. There is mounting evidence that the conditions they experience ? air, light, sound, interior design, materials, and architectural features ? influence their health. These effects may disproportionately occur in vulnerable populations, defined by individual, socioeconomic, cultural or geographic characteri...
Article
Full-text available
Communication between designer and client is a critical component of the design process, and still images have been part of the process for decades. Successful projects rest on realistic portrayals of scenes, whether they are photographs of real places or renderings of places yet to be built. La communication entre concepteur et client constitue un...
Article
Full-text available
Evidence is mounting that conditions in buildings can influence health; current topics include indoor exposures to lighting, noise, and chemicals; the availability of windows; and, overall housing quality. These findings have had limited influence on building design, construction, and operation, in part because of limited interaction between the re...
Article
Full-text available
In two experiments in a simulated office space, temporary office personnel worked under one of six lighting conditions for a day. A previous paper reported the results of statistical tests for lighting conditions effects on perceptions, feelings, and task performance. This paper reports mediated regression analyses testing the linked mechanisms by...
Article
Abstract Abstract We applied binary logistic regression techniques to data collected from 779 participants in a field study of open-plan (‘cubicle’) offices conducted in nine buildings. Independent variables were physical conditions in the workplace, and dependent variables were derived from occupant satisfaction measures; personal characteristics...
Article
NRC Institute for Research in Construction conducted a study to show the energy saving from individual control over lighting. The study found that the people with ability to adjust their light levels to suit their preferences are satisfied with the lighting. Despite of four lighting designs and four illuminance levels 118 participants of the study...
Article
In this parametric study, the influence of office design variables on occupant satisfaction was examined, using high dynamic range (HDR) images as stimuli. The setting was an open plan office with cubicles defined by modular systems furniture. Photographs were taken of the view afforded to the occupant sitting in the second row in from the window....
Article
Full-text available
Good lighting balances the needs of humans, economic and environmental issues, and architectural design. Good lighting provides for the needed level of visual performance, but also determines spatial appearance, provides for safety, and contributes to human health and well-being. Our daily exposure to light and darkness influences circadian cycles...