ARTICLE IN PRESS
Journal of Environmental Psychology 27 (2007) 177–189
www.elsevier.com/locate/jep
A model of satisfaction with open-plan office conditions:
COPE field findings
Jennifer A. Veitch, Kate E. Charles1, Kelly M.J. Farley2, Guy R. Newsham
NRC Institute for Research in Construction, Bldg M-24, 1200 Montreal Road, Ottawa, ON, Canada K1A 0R6
Available online 18 May 2007
Abstract
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 questionnaire was administered to 779 open-plan office
occupants from nine government and private sector office buildings in five large Canadian and US cities. Exploratory and confirmatory
factor analyses revealed that the 18-item environmental satisfaction measure formed a three-factor structure reflecting satisfaction with:
privacy/acoustics, lighting, and ventilation/temperature. Structural equation modelling indicated that open-plan office occupants who
were more satisfied with their environments were also more satisfied with their jobs, suggesting a role for the physical environment in
organisational well-being and effectiveness.
r 2007 The Crown in Right of Canada. National Research Council, Ottawa. Published by Elsevier Ltd. All rights reserved.
Keywords: Environmental satisfaction; Job satisfaction; Structural equation modelling; Open-plan offices; Cubicles; Field study; Working conditions;
Lighting; Ventilation; Privacy; Acoustics
1. Introduction
Despite decades of research into relations between the
physical work environment, the individual workers, their
interpersonal relations, and the organisation (e.g., Bauer
et al., 2003; Brill, Margulis, Konar, & BOSTI, 1984; Brill,
Weidemann, & BOSTI Associates, 2001; Carlopio, 1996;
Oldham & Brass, 1979; Sundstrom, 1987; Sundstrom, Bell,
Busby, & Asmus, 1996; Sutton & Rafaeli, 1987), the
literature remains scattered and poorly linked to the
engineering and design disciplines that might make use of
it. Designers and facilities managers continue to ask for
demonstrable proof that the physical environment influences organizational outcomes such as job satisfaction,
work output, absenteeism, turnover, and, ultimately,
organizational productivity. Psychologists have been
Corresponding author. Tel.: +1 613 993 9671.
E-mail address: jennifer.veitch@nrc-cnrc.gc.ca (J.A. Veitch).
Formerly of the NRC Institute for Research in Construction.
2
Now at National Defence Headquarters, Department of National
Defence, Ottawa, Canada.
1
unable to provide such direct evidence with sufficient
scientific rigour to settle the question (Rubin, 1987; Wyon,
1996). Absent such evidence, the continued push to reduce
work space size, often on the basis of containing real estate
costs (Space Planning, 2003) suggests that many business
managers continue to see the physical office environment
as simply a convenient space to house their employees,
rather than an asset that could positively influence
their staff.
One reason for the slow progress of research in this area
has been the absence of commonly-used, reliable, standardised tools to measure occupants’ ratings of the work
environment. Stokols and Scharf (1990) set out four
criteria for standardised research instruments addressing
the physical work environment. First, the questionnaire
should be streamlined in length and wording so participants can complete the protocols in a straightforward
manner. Second, the scope of the content should be
sufficiently broad so that important aspects of facility
design are not neglected. Third, in addition to characteristics of the physical work environment, other variables
that should be included are participants’ biographic
0272-4944/$ - see front matter r 2007 The Crown in Right of Canada. National Research Council, Ottawa. Published by Elsevier Ltd. All rights reserved.
doi:10.1016/j.jenvp.2007.04.002
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characteristics, job status or category, and ratings of job or
work satisfaction. Fourth, survey items should be directly
relevant to organisational problem-solving strategies. That
is, the findings from research using these instruments
should suggest specific organisational and environmental
design strategies that can be implemented to resolve
problems identified in the research.
Although there are a few questionnaires that meet these
criteria, an extensive literature search did not uncover
many journal articles that have used these tools to link
specific physical conditions with occupants’ feelings. For
example, Dillon and Vischer (1987) developed a 24-item
questionnaire and method for assessing occupants’ feelings
and judgements concerning building performance. It
included 22 specific feature ratings, and two general
questions. The 22 items were chosen from a larger set of
35 items on the basis that these items formed the most
interpretable 7-factor solution: thermal comfort, privacy,
noise control, spatial comfort, lighting comfort, building
noise control, and air quality. Scores on these factors
formed the basis for the beginning of a normative data set
of building ratings that continues to be developed and used
for building and design assessments (Vischer, 1989, 2007).
However, statistical details concerning the original derivation of the factors are scant, and the questionnaire has not
been taken up by the research community.
Stokols and Scharf (1990) developed the Ratings of
Environmental Features (REF) questionnaire for use in a
variety of office settings. The main physical features
included in the REF were acoustical privacy, air quality
and lighting. The basic REF contains 27 items for which
participants rate the quality of several physical features
(e.g., ‘‘conversational privacy within your office’’ and
‘‘quality of lighting for the work you do’’), on seven-point
scales from ‘‘very poor’’ to ‘‘excellent’’. Stokols and Scharf
reported acceptable internal consistency values (.87 to .94)
over five pilot administrations of the REF. Scharf (1995)
further analyzed relationships between office design,
principally enclosure around workstations, and distraction,
in which REF ratings were among the outcome variables.
Another example of the development of a standardised
tool is Carlopio’s (1996) Physical Work Environment
Satisfaction Questionnaire (PWESQ) which included the
assessment of five general areas (environmental design,
facilities, work organisation, equipment and tools, and
health and safety). He validated the tool in a field survey
involving factory and office employees in eight companies
ranging from a computer assembly site to durable goods
manufacturing warehouses. The PWESQ met criteria for
internal consistency and discriminant validity. However,
we could find no publications that used the PWESQ for
further research.
To better understand the influence of the office environment on organisational well-being and effectiveness,
research in this area needs to include outcomes more
traditionally addressed by business and organisational
researchers, such as job satisfaction, organisational
commitment and absenteeism. These outcomes, among
others, are building blocks that contribute to organisational productivity (e.g., Kaplan & Norton, 1992a, 1992b).
A comprehensive meta-analysis of the job satisfaction–job
performance relationship estimated the strength of the
relationship as .30, and somewhat higher for highcomplexity jobs (Judge, Thoresen, Bono, & Patton,
2001). Furthermore, business units with higher average
job satisfaction showed lower turnover and improved
profitability (Harter, Schmidt, & Hayes, 2002).
Several office environment investigations have examined
direct effects of environmental features on job satisfaction
(e.g., Oldham & Brass, 1979; Oldham & Fried, 1987;
Sundstrom, Burt, & Kamp, 1980). More intriguing are
those studies in which reactions to the physical office
environment mediate the relationship between the physical
conditions and relevant outcomes for organisations. Such
studies offer the possibility of including both direct and
indirect effects. Wells (2000), for example, found that the
ability to personalise one’s work area was positively related
to environmental satisfaction, which in turn positively
influenced job satisfaction and employee well-being.
Similarly, in his study using the PWESQ, Carlopio (1996)
found that satisfaction with the physical environment and
job satisfaction both related to organisational commitment
(positively) and intent to turnover (negatively).
Success in understanding how office environments
influence occupants and organizations requires truly
interdisciplinary research, combining rigorous measurements of physical conditions in offices (from the building
sciences) with reliable, standardised tools to measure
occupants’ responses to the work environment (from
psychology). One example of such a study is contained in
a book chapter by Hedge, Erickson, and Rubin (1992), in
which physical measurements of indoor air quality and
surveyed measurements of job characteristics, stress, and
demographic variables (based on previously validated
questionnaires) were examined as possible correlates of
sick building syndrome symptoms. Overall, however, few
studies have achieved a high standard of scientific rigour
for both physical measurements and employee physiological and behavioural responses (Wyon, 1996). Researchers
skilled in measuring the physical environment in detail are
often ill-equipped to study occupants’ reactions to that
environment. Similarly, psychologists and other behavioural researchers with abilities to examine occupant behaviour
typically lack the expertise to quantify the physical
environment with scientific rigour (Rubin, 1987; Wyon,
1996). For instance, Sutton and Rafaeli (1987) defined
hotness as ‘‘the product of an employee’s judgement as to
how often it got too hot at a work station and the
[estimated] temperature when it is at its hottest’’ (p. 264),
rather than measuring temperature directly.
The current paper draws data from a field study that was
designed to address this limitation. The field study was
designed to determine the effects of open-plan office design
on the indoor environment and on occupant satisfaction
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with that environment. The study is rare in that it combines
extensive local physical measurements paired with simultaneous questionnaire data collection. The field study forms
part of the Cost-effective Open-Plan Environments
(COPE) project, a 4-year multidisciplinary investigation
of open-plan offices. The project was developed in response
to the continuing pressure facing organisations and their
facilities managers to reduce space allocation to individuals
in open-plan offices as a means to reduce costs. Current
management philosophies also support the lowering of
partitions between individual workers, in an attempt to
promote communication and synergy. These trends, however, risk creating an unpleasant working environment,
either directly through the creation of adverse physical
conditions (e.g., more noise, added obstructions to light
distribution), or indirectly through psychological processes
such as privacy or stress.
Fig. 1 shows an example of the office types studied in the
COPE project. They are conventional, rectilinear cubicles
created using modular systems furniture. Although there
has been much talk of novel ways of working and
innovative office design, contacts in the office furniture
industry, including the project sponsors, informed us that a
large majority of office furniture sales remain of this
conventional type. Therefore, the project focused only in
this area.
Fig. 2 shows a conceptual model of the COPE project.
The model posits that workstation characteristics (particularly workstation size and partition height, but not
limited to those) (captioned ‘i’ in Fig. 2), interacting with
the performance of building services, determine the
physical conditions in the workstation (ii). The physical
conditions (ii) and the workstation characteristics (i) jointly
determine satisfaction with features of the physical
179
environment (iii), which in turn positively predict overall
environmental satisfaction (iv) and job satisfaction (v).
Different parts of the model have been tested using
laboratory, computer simulation and literature review
studies, in addition to the field study component.
While the relationships between measured physical
variables and environmental satisfaction (i, ii, and iii in
Fig. 2) are undoubtedly important, space considerations do
not allow these analyses to be described in the current
paper. These results can, however, be found in a number of
publicly available COPE project reports (Newsham,
Veitch, Charles, Bradley et al., 2003; Newsham, Veitch,
Charles, Marquardt et al., 2003; Veitch, Charles, Newsham, Marquardt & Geerts, 2003) and in journal and
conference papers (Charles, Veitch, Newsham, Marquardt,
& Geerts, 2006; Newsham, Veitch, & Charles, 2007; Veitch,
Geerts, Charles, Newsham, & Marquardt, 2005).
The current paper focuses on the relationships between
environmental satisfaction and job satisfaction (iii, iv, and
Fig. 2. Conceptual model of the COPE project.
Fig. 1. Sample of the open-plan offices that were the focus of the COPE project.
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v in Fig. 2). We report on the field validation and factor
structure of the office environmental satisfaction measure
developed for this field study, based on Stokols and
Scharf’s (1990) REF measure. The REF was selected
because it was derived and validated in office settings
similar to the open-plan offices that were the focus of our
study and had showed good performance over several
administrations. However, the REF instructions ask
participants to rate the quality of environmental features;
that is, to make judgements about each feature on a scale
from ‘‘very poor’’ to ‘‘excellent’’. Scharf and Margulies
(1992) argued that there is an important distinction to be
drawn between a judgement, whose object is external to the
rater, and a sentiment or feeling, and stated their opinion
that judgements are more valuable in discussions of
environmental quality. Our interest, however, is on the
experience of the individual in the space in response to
environmental conditions. Therefore, the measure we
developed here asks for feelings about each feature;
participants rate their degree of satisfaction on a scale
from ‘‘very dissatisfied’’ to ‘‘very satisfied’’.
The current paper adds to research in this area by testing
a model in which environmental satisfaction is positively
related to job satisfaction. Specifically, we hypothesised the
following:
Hypothesis 1. The Satisfaction with Environmental Features measure can be reduced to three factors, representing
satisfaction with privacy, ventilation and lighting.
Hypothesis 2. The three-factor Satisfaction with Environmental Features measure can be jointly, positively related
to overall environmental satisfaction, which in turn can be
related to job satisfaction.
2. Method
2.1. Sites
Data were collected in nine office buildings, located in
large Canadian and US cities. The first three buildings
were occupied by federal government organisations and
were visited in 2000 (sample A). Six further buildings
were visited in 2002 (sample B) and comprised four privatesector office buildings and two provincial government office buildings. The floors visited within each
building were selected because they contained open-plan
offices occupied by white-collar workers, and because the
occupying organizations on those floors were willing to
host the visit. We were not looking for ‘problem’ locations or spaces with unusually superior conditions. We
targeted a mix of public/private organisations and
Canadian/US locations to broaden the generalisability of
results. Detailed information on the buildings included in
this study are provided in Charles, Veitch, Farley, and
Newsham (2003).
2.2. Participants
Participants were the occupants of floors visited by the
research team. Their occupations varied, but all were
white-collar, knowledge workers whose work involved
manipulating information and documents, on computer
and on paper, most of the time. The range of occupations
included engineering and architecture, accounting and
finance, policy development, software development, administration, and management. All occupants present on
the visit days were eligible to participate, and researchers
selected as many available participants as they had time to
approach during the visit day. Formal response rates were
not recorded, but approximately 90% of those invited
agreed to take part. There were no discernable patterns in
the demographic characteristics or building locations of
occupants who chose not to participate. Table 1 shows the
demographic characteristics for the full sample, and for
two subsets of the full sample (sample A and sample B)
that were used for statistical analyses, as described below.
2.3. Procedure
2.3.1. Advance communications
The procedure was approved by our institution’s
Research Ethics Board, which mandated thorough communication about the research as part of the informed
consent process. The project manager co-ordinated all onsite activities with local staff members in each building.
Host staff led research staff on building walk-throughs,
provided building plans, and co-ordinated security clearances. Where possible, the research staff met in advance
with a suitable joint management-employee committee to
provide information about the study. In all buildings,
management sent an email to staff prior to the research
team’s visit, informing them of the study and indicating
that it had management support. Accompanying this was a
message from the research team explaining the study,
emphasising confidentiality and voluntary participation,
and highlighting the research team’s independence from
management. These e-mails were re-sent on the first day the
research team made measurements.
2.3.2. Measurements
A team of two researchers conducted the measurements.
The researchers introduced themselves to employees who
were seated at their desks, explained the study, the
measurement procedure (including an estimated time
commitment, around 15 min), and the employee’s rights
should they choose to participate. If an employee agreed to
participate, he or she was asked to step outside of the
workstation in the company of the one of the researchers.
The researcher took the participant to a nearby location,
typically a vacant workstation, and gave instructions about
the questionnaire. The questionnaire was presented on a
hand-held computer with a touch screen, and was preceded
by several practise questions to familiarise the participant
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Table 1
Demographic characteristics of participants
Site
N
% English
% Female/% Male
Mean age (SD)
Full sample
Sample A
Sample B
779
419
360
79.5
87.6
70.0
47.6/51.5
48.7/50.4
46.4/52.8
36.2 (10.6)
38.6 (10.8)
33.5 (9.5)
Technical
Professional
Management
Job category (%)
Administration
Full sample
Sample A
Sample B
27.1
36.0
16.7
24.9
14.8
36.7
38.4
41.3
35.0
8.6
6.7
10.8
Education (%)
High school
Full sample
Sample A
Sample B
11.6
16.0
6.4
Community
college
University courses
15.1
17.7
12.2
14.6
14.6
14.7
Undergraduate degree
34.0
26.0
43.3
Graduate degree
22.7
23.2
22.2
Note: Percentages that do not sum to 100 are the result of rounding error and missing data.
with the delivery method. The researcher then left the
participant to answer the questionnaire in private, and
returned to help the other member of the team with the
physical measurements in the workstation. The participant
was instructed to return to his or her workstation for
assistance from the research team if it were needed.
While the occupant was completing the questionnaire,
the researchers collected physical data in the occupant’s
workstation. The physical measurements took approximately 13 min for practiced teams (Veitch, Farley, &
Newsham, 2002). Once the physical measurements and
occupant questionnaire were completed, the researchers
moved on to invite the next available employee to
participate. There was no set plan as to which employees
were approached when, and some work areas were
revisited several times to recruit employees who had been
unavailable on previous visits to the work area.
2.4. Measures
2.4.1. Satisfaction with environmental features (SEF)
This measure comprised eighteen questions that asked
participants to indicate their degree of satisfaction with
various aspects of the physical environment. The wording
for these items is shown in Table 2. Participants responded
on a seven-point scale that ranged from ‘very unsatisfactory’ (1) to ‘very satisfactory’ (7), and were asked to
respond based on the physical conditions that existed in
their workstation at the time they were asked to
participate. This frame of reference was chosen so that
the questionnaire responses would be applicable to the
physical measurements collected in each workstation by the
researchers. The questions were based on Stokols and
Scharf’s (1990) REF questionnaire. The item wording was
modified to aid readability and to address feelings
(satisfaction) rather than judgements (‘‘rate the qualityy’’), and new items were constructed to address
environmental features not included in the original REF,
such as glare on computer screens and the degree of
workstation enclosure. In addition, original items that
encompassed more than one environmental feature were
modified so that each new item addressed one specific
feature (e.g., original item on ‘air quality and circulation’
was modified into two new items on ‘air quality’ and ‘air
movement’).
2.4.2. Overall environmental satisfaction
This scale comprised two items. The first asked
participants ‘What is your degree of satisfaction with the
indoor environment in your workstation as a whole?’, and
participants responded using the same seven-point scale
described above. This item was also from Stokols and
Scharf’s (1990) REF questionnaire. The second item asked
employees to rate how the environment influenced their
productivity at the time of the survey, relative to general
prevailing conditions. This question was taken from a UK
building use survey (Wilson & Hedge, 1987), and
occupants responded on a scale ranging from ‘30% less
productive’ (1) to ‘30% more productive’ (7) than usual.
2.4.3. Job satisfaction
The two-item job satisfaction scale was drawn from a
recent Canadian federal public service survey (Treasury
Board, 2000). Participants responded on a seven-point
scale, ranging from ‘very strongly disagree’ (1) to ‘very
strongly agree’ (7) to the following items: ‘My department/
agency is a good place to work’, and ‘I am satisfied with my
job’. The latter question was modified from the original,
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Table 2
Rotated three-factor EFA solution
Question
Sat. with privacy/
acoustics
SEF-7. Amount of noise from other people’s conversations while you are at
your workstation
SEF-17. Frequency of distractions from other people
SEF-18. Degree of enclosure of your work area by walls, screens or furniture
SEF-6. Level of visual privacy within your office
SEF-15. Distance between you and other people you work with
SEF-5. Level of privacy for conversations in your office
SEF-9. Amount of background noise (i.e. not speech) you hear at your
workstation
SEF-8. Size of your personal workspace to accommodate your work, materials,
and visitors
SEF-13. Your ability to alter physical conditions in your work area
SEF-4. Aesthetic appearance of your office
SEF-12. Air movement in your work area
SEF-2. Overall air quality in your work area
SEF-3. Temperature in your work area
Sat. with ventilation/
temperature
.79
.71
.72
.71
.68
.79
.64
.57
.56
.51
.71
.71
.70
SEF-16. Quality of lighting in your work area
SEF-1 Amount of lighting on the desktop
SEF-10. Amount of light for computer work
SEF-11. Amount of reflected light or glare in the computer screen
SEF-14. Your access to a view of outside from where you sit
% of variance explained
Cronbach’s a
Factor correlation to sat. with lighting
Factor correlation to sat. with ventilation/temperature
Sat. with lighting
.65
.65
.56
.44
.54
26.1
.88
16.6
.82
.39
.44
.25
14.4
.76
Note: N ¼ 202. Factor loading cut-off ¼ .400. SEF: Satisfaction with environmental features.
which referred to employees’ satisfaction with their career
in the public service.
2.4.4. Demographic characteristics
Five questions assessed participants’ demographic characteristics in terms of age, sex, education, and job type.
These variables were used to compare the composition of
the samples of participants in the various buildings, and as
covariates in regression analyses not reported here.
2.4.5. Language
Participants had a choice of responding to the questionnaire in English or French. The French translation of
the questionnaire is available in Veitch et al. (2002). The
translation was produced by a professional translator from
the final English version, and the adequacy of the
translation was tested through back-translation by a
second translator. Data from English and French participants were combined because the number of participants
who chose French was small (20.5% of participants;
N ¼ 160) and it seemed unlikely that questions on this
particular topic would suffer from cultural biases in
translation in this population. Furthermore, French-speaking and English-speaking participants occupied the same
buildings, which were operated to North American
standards, and there were no cultural difference in building
design or operation in this sample.
2.4.6. Physical conditions
The research staff took physical measurements of the
individual’s workstation while the occupant completed the
questionnaire. These measurements were made using a
custom-designed array of physical sensors, mounted on an
office chair so that it could be placed where the participant
usually sat. Lighting, thermal, air quality, and acoustical
conditions were all measured, and workstation characteristics were also recorded. The physical measurements are
described in detail in Veitch et al. (2002). The physical data
were not used in the analyses reported in this paper, but
feature in other reports from the COPE project (Charles
et al., 2006; Newsham, Veitch, Charles, Bradley et al.,
2003; Newsham, Veitch, Charles, Marquardt et al., 2003;
Veitch et al., 2003; Veitch et al., 2005).
2.5. Statistical analyses
To test Hypothesis 1, exploratory (EFA) and confirmatory factor analyses (CFA) were conducted, using subsets
of the full data set. Following the collection of sample A in
2000, this sample was split into two sub-samples to conduct
EFA and CFA analyses. After sample B was collected in
2002, this sample was used to conduct a second CFA
analysis for comparison purposes. Hypothesis 2 was tested
using structural equation modelling (SEM) on the complete
data set (samples A & B combined).
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In all cases, data preparation and screening were
conducted using procedures recommended by Kline
(1997). Variable mean imputation was used where missing
data were infrequent and randomly distributed. Cases with
missing data on multiple items were excluded from
analyses. Univariate outliers were identified as those with
standardised scores more than three standard deviations
from the mean, and were excluded from the analyses.
Multivariate outliers were identified using Mahalanobis
distance statistic at po.001, and were also excluded from
analyses. Univariate normality was assessed using skewness
(absolute values above 3) and kurtosis (absolute values
above 8) values. Where appropriate, the data sets were
examined for multicollinearity (correlations above .80) and
singularity (correlations below .30, and communality
values above 1.0) prior to analyses.
Model fit for the CFA and SEM analyses was assessed
using multiple statistical and fit indices including w2,
Goodness of Fit Index (GFI), Adjusted Goodness of Fit
Index (AGFI), Comparative Fit Index (CFI), BentlerBonett Normed Fit Index (NFI), Bentler-Bonett Nonnormed Fit Index (NNFI), Standardised Root Mean
Square Residual (SRMR) and Root Mean Square Error
of Approximation (RMSEA). We also looked for statistical significance of the paths, and the proportion of
standardized residuals between .1 and .1. Detailed
descriptions of these and other indices can be found in
several sources (e.g., Byrne, 1994; Kline, 1997; Tabachnick
& Fidell, 2001). In addition, the Legrange Multiplier (LM)
test and the Wald W statistic were examined to determine
possible misfits. The LM test provides an estimate of how
much the overall w2 statistic would decrease if a particular
parameter were added. Conversely, the Wald W-test
estimates the amount the overall w2 would increase if a
particular free parameter were fixed, that is, dropped from
the model (Kline, 1997).
183
used for a second confirmatory factor analysis. Complete
details of sample B are available in Charles et al. (2003).4
3.1.1. Data screening
Sample A was randomly divided into two independent
sub-samples for exploratory and confirmatory factor
analysis. Four univariate and eight multivariate outliers
were identified and dropped, leaving a total of 407 cases for
analysis (EFA, N ¼ 202 and CFA, N ¼ 205). The distribution of site, language, sex, education, and job category was
equivalent in each group. Complete details of sample A
and the two subsamples are available in Veitch et al.
(2002).3
For sample B, there were no univariate outliers, but five
cases were dropped after being identified as multivariate
outliers, leaving 353 cases for analysis. This sample was
3.1.2. Exploratory factor analysis
Examination of the correlation matrix for the EFA subsample (from sample A) indicated the absence of multicollinearity (the maximum correlation was .76 between the
items ‘overall air quality in your work space’ and ‘air
movement in your workspace’). However, the item ‘your
access to a view from where you sit’ had only one
correlation above .30 (.30 with ‘the aesthetic appearance
of your office’) indicating potential singularity problems.
A review of the communality values indicated the same
variable had a value of 1.0. Despite these concerns, access
to a view has consistently been shown to positively
influence occupants (Farley & Veitch, 2001). Given
that this variable has strong theoretical reasons for
being included in the questionnaire, it was decided to
keep the variable in the data for the purposes of the
EFA.
Using the factor analysis procedure in EQS 5.7b (Bentler
& Wu, 1995), with maximum likelihood extraction and
direct oblimin (oblique) rotation, a free EFA was
conducted. The cutoff for factor loadings to be included
in a factor was .400. This resulted in a solution with four
factors having eigenvalues greater than 1 (range ¼
1.038–7.213). Examination of the scree plot supported the
four-factor solution. The four-factor solution was composed of three clear factors (labelled Satisfaction with
Privacy/Acoustics, Satisfaction with Lighting, and Satisfaction with Ventilation/Temperature) with several high
value loading items on each factor. A fourth factor was a
stand-alone factor (view) consisting of only one variable.
Although these results support a four-factor solution, the
correlational problems with the ‘view’ item appeared
to be negatively influencing this solution. According to
Tabachnick and Fidell (2001) ‘‘if only one variable loads
highly on a factor, the factor is poorly defined’’ (p. 622).
Therefore, we forced a three-factor EFA solution, the
results of which are shown in Table 2.
In the three-factor solution, all items appeared in the
same factor as previously with the exception of the ‘view’
item, which loaded moderately (.54) on the Satisfaction
with Lighting factor. The three factors accounted for
57.05% of the total variance observed. There were no cross
loadings and all items loaded significantly on a factor,
therefore all were retained. Correlations between the
three factors confirmed the applicability of direct
oblimin (oblique) rotation, as they exceeded .32 on average
(Tabachnick & Fidell, 2001). Internal consistency values
(Cronbach’s a) were satisfactory for each factor (see
Table 2). The factors were labelled Satisfaction with
Privacy/Acoustics, Satisfaction with Lighting, and Satisfaction with Ventilation/Temperature.
3
A version of this analysis was presented at the Canadian Psychological
Association 2002 convention (Farley & Veitch, 2002).
4
A version of this analysis was presented at the Canadian Psychological
Association 2004 convention (Charles, Veitch, Farley, & Newsham, 2004).
3. Results
3.1. Factor structure of SEF measure
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3.1.3. Confirmatory factor analysis-A
A review of the correlation matrix for the CFA subsample (from sample A) revealed no evidence of multicollinearity. However, the item ‘your access to a view from
where you sit’ again showed possible singularity problems
with only one correlation above .30; (.42; ‘the amount of
lighting on the desktop’), although all communality values
were less than 1.0. Given these findings it was decided to
proceed with the CFA, using the three-factor EFA model
as the basis for comparison.
The model submitted for analysis consisted of maximum
likelihood estimations of the 18 target loadings, three
factor variances, correlations between all factors and error
variances for each of the 18 items.
Table 3 shows a summary of the results of the CFA,
including target values for the various fit indices, based on
authoritative sources (e.g., Byrne, 1994). The results of this
analysis (labelled CFA-A1 in Table 3) indicated a marginal
fit between the model and the data. All the factor loadings
were statistically significant, but additional statistics were
examined to assess the possibilities for improving model fit
by adding or dropping parameters.
The Wald W-test indicated the model would not be
improved by dropping any parameters. The LM test
indicated the model could be improved by adding a
parameter from the variable ‘the aesthetic appearance of
your office’ to the ‘satisfaction with lighting’ factor.
Satisfaction with the appearance of one’s office or workspace
Table 3
Goodness of fit indices for CFA analyses
Target fit
N
w2
w2/df
o3
GFI
4.90
AGFI
4.90
CFI
4.90
NFI
4.90
NNFI
4.90
SRMR
o.10
RMSEA (90% CI)
o.10
CFA-A1
205
363.4
2.75
.83
.77
.85
.78
.82
.07
CFA-A2
205
353.2
2.69
.83
.78
.86
.79
.83
.07
CFA-B
353
527.6
4.00
.85
.81
.86
.82
.83
.08
.09
(.08–.10)
.09
(.08–.10)
.09
(.08–.10)
Note: Detailed results for model CFA-B are shown in Fig. 3. Target values are based on Byrne (1994), Kline (1997), and Tabachnick and Fidell (2001).
Fig. 3. Complete results for the CFA (sample B).
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might reasonably be related to the quality of lighting
available. Therefore, it was decided to add the parameter
and run a post hoc model.
This model, labelled CFA-A2, is summarised in Table 3.
Additional statistics were further examined: The frequency
distribution of the standardised residuals revealed that
most residuals (91.81%) fell between .10 and .10, which is
desirable. All estimated factor loadings were significant and
internal consistency values for each subscale were satisfactory (privacy, a ¼ .89; lighting, a ¼ .82; and ventilation,
a ¼ .82). However, this result was not judged to be enough
of an improvement over CFA-A1 to warrant the additional
complexity of a cross-loading item (a variable contributing
to more than one latent variable). The cross-loading item
would have complicated interpretation of further analyses
using scale scores for the latent variables as dependent
variables.
3.1.4. Confirmatory factor analysis-B
EQS for Windows 6.1 (Bentler & Wu, 2003) was used for
CFA analysis of sample B, based on the model labelled
CFA-A1. The result is shown in Table 3 (labelled CFA-B)
and the complete model in Fig. 4. In comparison to CFAA1, CFA-B shows poorer fit in relation to the w2/df fit
index (4.00 as compared to 2.75). However, this statistic is
very sensitive to sample size, and therefore reflects the
increased size of sample B. In addition, the results show
small improvements in fit for most of the remaining fit
indices (GFI, AGFI, NFI, and NNFI). Only 83.7% of the
standardized residuals were between .1 and .1, which is
lower than the suggested target of 90%. The LM test for
the CFA-B again suggested the addition of a cross-link
from ‘the aesthetic appearance of your office’ to ‘satisfaction with lighting’. However, given the conclusions reached
during CFA-A1, there was no justification to modify the
model. In both CFA-A1 and CFA-B, all parameter
estimates were statistically significant. Overall, sample B
fit the EFA model as well as the subsample from sample A,
suggesting that the model developed from the original
analysis remained applicable.
3.2. Modelling relationships between environmental
satisfaction and job satisfaction
The SEF measure concerns satisfaction with elements in
the physical environment at work, of interest to environmental psychologists and design consultants. We used
structural equation modelling to test for relationships
between these facets of satisfaction and more global
concepts such as overall environmental satisfaction and
job satisfaction, to make the logical link to the broader
literature. Complete details for this analysis are available in
Charles et al. (2003).
3.2.1. Data screening
The SEM analysis was conducted on the complete data
set (A and B). The mean, standard deviation, skewness and
Table 4
Descriptive statistics for SEM sample
Question
M
SD
Skewness
Kurtosis
SEF-1
SEF-2
SEF-3
SEF-4
SEF-5
SEF-6
SEF-7
SEF-8
SEF-9
SEF-10
SEF-11
SEF-12
SEF-13
SEF-14
SEF-15
SEF-16
SEF-17
SEF-18
5.17
4.37
4.34
4.51
2.63
3.83
2.96
4.47
4.17
4.97
4.46
4.09
3.54
4.38
4.62
4.75
3.76
4.34
1.60
1.63
1.62
1.66
1.57
1.81
1.53
1.82
1.59
1.48
1.68
1.62
1.57
2.23
1.59
1.57
1.54
1.65
.98
.30
.27
.39
.83
.05
.52
.43
.28
.87
.43
.13
.16
.27
.62
.65
.04
.34
.04
1.04
1.09
.81
.30
1.25
.62
1.08
.89
.16
.93
1.02
.84
1.43
.59
.65
.99
.96
OES-1
OES-2
JS-1
JS-2
3.85
4.26
5.05
5.10
1.48
1.54
1.19
1.24
.23
.25
.97
.78
.57
1.03
1.54
.71
Note: N ¼ 714. SEF: Satisfaction with environmental features. OES:
Overall environmental satisfaction. JS: Job satisfaction.
kurtosis for all items are shown in Table 4. Three cases had
missing data on all questionnaire items, and were excluded
from the analysis. There were 59 cases that had missing
data for one or more items. Variable mean substitution was
used where appropriate (20 cases), but the remaining cases
were excluded from analysis because there was missing
data on multiple items or on items that loaded on the same
subscale. None of the items exceeded the criteria for
skewness or kurtosis. There were 18 cases that were
excluded as univariate outliers, and five cases excluded
as multivariate outliers. The remaining sample numbered
714 cases.
Examination of the correlation matrix for the full data
set indicated no multicollinearity problems (largest correlation .73 between ‘quality of lighting in your work area’ and
‘amount of light for computer work’). The item ‘access to a
view from where you sit’ was again only weakly correlated
with other items, indicating potential singularity problems.
However, given that there are strong theoretical reasons for
including this item in the questionnaire, the item was
retained.
3.2.2. Structural equation modelling
Prior to the collection of sample B, preliminary SEM
analyses were conducted on sample A, to explore possible
models relating satisfaction with environmental features,
overall environmental satisfaction and job satisfaction
(Veitch et al., 2002). These preliminary analyses indicated
that the best-fitting model consisted of the three, intercorrelated, factors (identical to the CFA model, Fig. 3),
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Table 5
Goodness of fit indices for SEM analysis
Target fit
N
w2
w2/df
o3
GFI
4.90
AGFI
4.90
CFI
4.90
NFI
4.90
NNFI
4.90
SRMR
o.10
RMSEA (90% CI)
o.10
Full sample
714
1042.2
5.16
.88
.84
.88
.85
.86
.06
.08
(.07–.08)
Note: Full results with parameter estimates are shown in Fig. 4. Target values are based on Byrne (1994), Kline (1997), and Tabachnick and Fidell (2001).
Fig. 4. Complete results for the SEM of environmental satisfaction and job satisfaction (full data set).
plus unidirectional paths from each factor to overall
environmental satisfaction, and a unidirectional path from
overall environmental satisfaction to job satisfaction.
Other models were explored, but this model had the best
fit, was the most parsimonious, and was consistent with the
literature (Veitch et al., 2002). Therefore, we used this
model as the basis for analyzing the structural relations in
the full data set.
The goodness of fit statistics are summarised in Table 5
and the complete model is shown in Fig. 4. Overall, the fit
is modest, but acceptable. All parameter estimates were
statistically significant (see Fig. 4), and 91.7% of the
standardized residuals lay between .1 and .1. The Wald
W statistic indicated that the model would not be improved
by dropping any parameters. The LM test indicated that
the model could be improved by adding a parameter from
the variable ‘the aesthetic appearance of your office’ to
‘overall environmental satisfaction’. However, the addition
of this parameter would add a cross-loading item to the
model, thereby increasing complexity of interpretation.
This added complexity was unlikely to be justified by a
significant increase in model fit, and so we decided not to
include this extra parameter in the model. The model
described in Fig. 4 adequately fits the full dataset, and is
clear and easily interpretable.
4. Discussion
The 18-item satisfaction with environmental features
measure was designed to be a useful, brief tool for the
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study of satisfaction with elements of the physical
environment in relation to measured physical conditions.
We hypothesised that the 18 items could be meaningfully
reduced to a smaller number of underlying latent variables.
In addition, we sought to relate environmental satisfaction
to job satisfaction in order to establish the logical link to
the broader organisational psychology literature.
Exploratory and confirmatory factor analysis (with two
independent confirmatory samples) determined that a
three-factor structure, reflecting satisfaction with privacy/
acoustics; satisfaction with lighting; and, satisfaction with
ventilation/temperature, best fit the data. Thus, Hypothesis
1 was supported. The fit was modest according to most
goodness-of-fit indices, but all the paths were statistically
significant and over 90% of the standardized residuals lay
between .1 and .1. We believe that the fit was reduced by
the generally high satisfaction with lighting (items SEF-1.
SEF-10, SEF-11, SEF-14, and SEF-16 in Table 4), because
of restricted range and a degree of non-normality in the
distributions of these variables. Despite this, the results
were consistent across two independent confirmatory
samples, and are also broadly consistent with other
researchers, who typically find three to five factors,
including those for lighting, ventilation and noise/privacy
(e.g., González, Fernández, & Cameselle, 1997; Veitch &
Newsham, 1998).
Comparisons between such studies are tricky because of
differing sets of items included and different analytic
choices, and because some investigators have used multivariate techniques despite small sample sizes. For instance,
González et al. (1997) found five latent variables underlying
environmental evaluations, which they named evaluation
(aesthetics), temperature, noise, air, and space; their analysis
of a 13-item scale had only 83 participants (subjects:
items ¼ 6.4). Veitch and Newsham (1998) used a variation
of the Stokols and Scharf (1990) Ratings of Environmental
Features and reported a five-factor solution (noise, ventilation, furniture, washrooms, and lighting), based on 294
participants and 23 items, a more acceptable subjects: Items
ratio (12.8). However, they used principal components
analysis with varimax rotation, a technique that does not
permit correlations between components, as was the case
here. Some authors would argue that intercorrelated
components are logically expected with ratings of environments, which are experienced as an integrated whole.
Two items, related to view and aesthetics, proved
problematic in our analyses. The aesthetics item was
suggested, on the basis of LM tests, as a possible crosslinkage between two of the satisfaction factors. We chose not
to add this cross-linkage because of the added complexity it
would bring to the model. In addition, adding this crosslinkage would cause problems for the creation of subscale
scores to be used in future regression analyses with physical
conditions as predictors. Additional CFA analysis indicated
that the addition of this cross-linkage did not improve model
fit sufficiently to offset the additional complexity created (see
Table 3, model CFA-A2).
187
The second item, related to view, exhibited potential
singularity problems. We suspect that part of the reason is
that the question might have been difficult to answer for
those people without a close access to a window. As access
to a view has consistently been reported in the literature as
beneficial to occupants (Farley & Veitch, 2001), we chose
to retain this item in the model. Future analyses will closely
examine the role of having a window as a determinant of
environmental satisfaction.
The three-factor model appears to be broadly generalisable across public- and private-sector samples and
both Canadian and US organizations. The data in sample
A was exclusively from employees in Canadian federal
government departments; sample B was split between
employees of Canadian provincial government departments (29%) and Canadian and US-based private sector
workers (71%). The model fit was unchanged from one
sample to the other, suggesting that for these variables, the
type of organisation from which participants are drawn
does not change the structural relations between the
variables.
The development and field validation of the SEF
measure provides the basis for explorations of the relationship between physical office conditions and environmental
satisfaction. The aim of the COPE project was to use this
measure to better understand how workstation characteristics (e.g., presence of a window) and physical conditions
(e.g., lighting level) influenced the relevant environmental
satisfaction factor(s) (e.g., satisfaction with lighting). The
statistical examination of such relationships (denoted i, ii,
and iii in Fig. 2) is needed in order to make practical
recommendations to designers about open-plan office
design choices to promote employee satisfaction. The
COPE project analyses on these relationships are available
elsewhere (Charles & Veitch, 2002; Newsham, Veitch,
Charles, Bradley et al., 2003; Newsham, Veitch, Charles,
Marquardt et al., 2003; Veitch et al., 2003) and form the
basis for existing and future empirical articles on this topic
(e.g., Charles et al., 2006; Newsham et al., 2007; Veitch
et al., 2005). Other possible directions for future analyses
include examination of the effects of job category on
environmental and job satisfaction.
Hypothesis 2 was supported: The overall model of
relations between the three environmental satisfaction
factors, overall environmental satisfaction, and job satisfaction (Fig. 3) revealed good consistency with the
conceptual model for the COPE project (see elements iii,
iv, and v in Fig. 2), moderately good fit indices, and
parsimony. Here too, restricted range and somewhat nonnormal distributions probably limited the model fit; the
items for satisfaction with lighting and those for job
satisfaction both had high means (over 5 out of 7 for the
job satisfaction items). The model is consistent with those
of other researchers, suggesting that occupants who are
more satisfied with their physical environment also report
greater job satisfaction (e.g., Dillon & Vischer, 1987;
Donald & Siu, 2001; Wells, 2000).
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This finding is important both as a validation of the
Satisfaction with Environmental Features measure, and
because of the link it establishes between the physical work
environment and the organisational psychology literature.
Several researchers have demonstrated that job satisfaction
is related to organisational outcomes such as commitment,
intent to turnover, customer satisfaction, and absenteeism
(e.g., Carlopio, 1996; Hardy, Woods, & Wall, 2003;
Hellman, 1997; Koys, 2001; Shaw, 1999). Carlopio (1996)
found that satisfaction with the physical work environment
including environmental design (e.g., light quality, light
direction, air quality, cleanliness) and job satisfaction
together predicted organisational commitment and intent
to turnover, with more satisfied employees reporting
greater organisational commitment and lower intent to
turnover. Hellman (1997) conducted a meta-analysis of
over 50 studies, confirming that the relationship between
job satisfaction and intent to leave was significantly
different from zero and consistently negative.
These effects appear to extend to the organisational
level. Harter et al. (2002) conducted a meta-analysis on
198,514 employees from 7939 business-units in 36 companies, to examine the relationships between employee
satisfaction and organisational outcomes. Their findings
indicated that the average job satisfaction for each
business-unit was consistently related to business-unit
customer satisfaction, turnover, accidents, productivity
and profitability.
Our results, therefore, suggest that satisfaction with the
physical environment may indirectly contribute to wider
organisational outcomes, a hypothesis that warrants
further attention in future work. Although industrial/
organisational psychology has paid scant attention to
workplace design in the 40 years since Herzberg (1966)
dismissed it as a dissatisfier, these findings and others
reveal that a satisfactory physical environment is one
component of a satisfied workforce and an effective
organisation.
Acknowledgements
This investigation was conducted as part of the NRC/
IRC project Cost-effective Open-Plan Environments
(COPE) (NRCC Project # B3205), supported by Public
Works and Government Services Canada, Natural Resources Canada, the Building Technology Transfer Forum,
Ontario Realty Corp, British Columbia Buildings Corp,
USG Corp, and Steelcase, Inc. Information about the
project, including detailed research reports related to this
data set, is available at http://irc.nrc-cnrc.gc.ca/ie/cope/.
Versions of the data in this paper were presented at
conventions of the Canadian Psychological Association in
2002 and 2004.
The authors acknowledge the assistance of Chantal
Arsenault, Gordon Bazana, John Bradley, Marcel Brouzes,
Nathalie Brunette, Raymond Demers, Cara (Duval)
Donnelly, Ryan Eccles, Tim Estabrooks, Brian Fitzpatrick,
Ralston Jaekel, Judy Jennings, Louise Legault, Roger
Marchand, Clinton Marquardt, Emily Nichols, and Scott
Norcross. We also thank the management and employees
of the nine buildings for their participation.
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