a room with a 'fake' view: installing digital windows in … · 2020-07-01 · video to...

5
A Room With a "Fake" View: Installing Digital Windows in Windowless Offices Donghee Yvette Wohn [email protected] New Jersey Institute of Technology Newark, New Jersey Hyejin Hannah Kum-Biocca [email protected] New Jersey Institute of Technology Newark, New Jersey, USA Astha Sharma [email protected] New Jersey Institute of Technology Newark, New Jersey, USA Anisah Khandakar [email protected] New Jersey Institute of Technology Newark, New Jersey, USA ABSTRACT As cities become overpopulated and we explore deep seas and outer space, humans will be faced with the inevitable situation of living and working in small spaces that are visually monotonous. It is thus important to understand the psychological effects that enclosed spaces can have on people. In this study, we ran a between-subjects design experiment with people working in windowless offices by installing a digital window that featured a nature landscape video. Quantitative measures of productivity and wellbeing before and after the intervention showed that having a digital window elevated mood and happiness, but did not have a significant effect on work productivity. CCS CONCEPTS Human-centered computing Empirical studies in HCI. KEYWORDS digital window; presence; green space; wellbeing; enclosed space; windowless ACM Reference Format: Donghee Yvette Wohn, Hyejin Hannah Kum-Biocca, Astha Sharma, and Anisah Khandakar. 2020. A Room With a "Fake" View: Installing Digital Windows in Windowless Offices. In ACM International Conference on Interactive Media Experiences (IMX ’20), June 17–19, 2020, Cornella, Barcelona, Spain. ACM, New York, NY, USA, 5 pages. https://doi.org/10.1145/3391614.3399397 1 INTRODUCTION With urbanization, pandemic isolation, and explorations into deep seas and outer space, humans will be faced with the inevitable situation of living in small spaces. Already, urbanization has led to a massive movement of tiny homes and pod living [14], while special research frontiers such as the arctic or outer space present spatial environments that are small and enclosed. The challenges of small spaces include long periods of isolation and confinement, which Permission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for third-party components of this work must be honored. For all other uses, contact the owner/author(s). IMX ’20, June 17–19, 2020, Cornella, Barcelona, Spain © 2020 Copyright held by the owner/author(s). ACM ISBN 978-1-4503-7976-2/20/06. https://doi.org/10.1145/3391614.3399397 lead to an array of symptoms from the physical (e.g., disturbed sleep, impaired cognitive ability), to psychological (e.g., negative affect, depression), and relational troubles [12]. Especially in environments that lack visual diversity (e.g., space, arctic regions, windowless offices, prisons), the feeling of entrapment or being in a void creates serious mental consequences. While technologies like virtual reality have the ability to pro- vide immersive experiences to “transport” people to other places, they are highly intrusive in terms of taking up the user’s atten- tion. In this research, we used projection and display technology as an ambient means to augment enclosed spaces with a fake digital “window” portraying nature landscape to examine how the illusion of being in a different environment influences the wellbeing and productivity of people working in windowless offices. This was expanding on the work of Friedman et al. [5], where the researches installed digital windows in university campus offices that showed live outdoor footage of the campus. In this study, participants’ re- ported an increase in their connection to the social community and their psychological well being. However, the digital displays used in this study were also used for work purposes, and were not a permanent architectural feature, thus in our study, we conceptual- ized our digital window as an interior ambient feature that would not disrupt workflow but would still be noticeable by the person occupying the space. We also aimed to quantify the effect of having such an installment. 2 RESEARCH QUESTIONS Changing the environment to make people feel like they are in a different environment—whether that be a physical environment and/or a social environment—taps into the concept of presence. Presence is a highly discussed construct with scholars having varied definitions of what it is [3], but the heart of the concept is the feeling of “being there” [2]. It has been used mainly to describe immersion when people use virtual environments or mediated technology. Even though virtual reality can enhance presence [5], these experiences require a headset and interfere with other tasks that require visual interaction outside of the virtual reality system. Our proposed system is a less-intrusive scenario where a digital window is placed on the wall of a room and is programmed with a video to simulate a window with a live view of a nature landscape. This window could be created with a high-resolution projection or a large physical display. This led to our decision of choosing a

Upload: others

Post on 28-Jul-2020

1 views

Category:

Documents


0 download

TRANSCRIPT

Page 1: A Room With a 'Fake' View: Installing Digital Windows in … · 2020-07-01 · video to simulate a window with a live view of a nature landscape. This window could be created with

A RoomWith a "Fake" View: Installing Digital Windows inWindowless Offices

Donghee Yvette [email protected]

New Jersey Institute of TechnologyNewark, New Jersey

Hyejin Hannah [email protected]

New Jersey Institute of TechnologyNewark, New Jersey, USA

Astha [email protected]

New Jersey Institute of TechnologyNewark, New Jersey, USA

Anisah [email protected]

New Jersey Institute of TechnologyNewark, New Jersey, USA

ABSTRACTAs cities become overpopulated and we explore deep seas and outerspace, humans will be faced with the inevitable situation of livingand working in small spaces that are visually monotonous. It is thusimportant to understand the psychological effects that enclosedspaces can have on people. In this study, we ran a between-subjectsdesign experiment with people working in windowless offices byinstalling a digital window that featured a nature landscape video.Quantitative measures of productivity and wellbeing before andafter the intervention showed that having a digital window elevatedmood and happiness, but did not have a significant effect on workproductivity.

CCS CONCEPTS• Human-centered computing→ Empirical studies in HCI.

KEYWORDSdigital window; presence; green space; wellbeing; enclosed space;windowlessACM Reference Format:Donghee YvetteWohn, HyejinHannahKum-Biocca, Astha Sharma, andAnisahKhandakar. 2020. A Room With a "Fake" View: Installing Digital WindowsinWindowless Offices. In ACM International Conference on Interactive MediaExperiences (IMX ’20), June 17–19, 2020, Cornella, Barcelona, Spain. ACM,New York, NY, USA, 5 pages. https://doi.org/10.1145/3391614.3399397

1 INTRODUCTIONWith urbanization, pandemic isolation, and explorations into deepseas and outer space, humans will be faced with the inevitablesituation of living in small spaces. Already, urbanization has led to amassive movement of tiny homes and pod living [14], while specialresearch frontiers such as the arctic or outer space present spatialenvironments that are small and enclosed. The challenges of smallspaces include long periods of isolation and confinement, which

Permission to make digital or hard copies of part or all of this work for personal orclassroom use is granted without fee provided that copies are not made or distributedfor profit or commercial advantage and that copies bear this notice and the full citationon the first page. Copyrights for third-party components of this work must be honored.For all other uses, contact the owner/author(s).IMX ’20, June 17–19, 2020, Cornella, Barcelona, Spain© 2020 Copyright held by the owner/author(s).ACM ISBN 978-1-4503-7976-2/20/06.https://doi.org/10.1145/3391614.3399397

lead to an array of symptoms from the physical (e.g., disturbed sleep,impaired cognitive ability), to psychological (e.g., negative affect,depression), and relational troubles [12]. Especially in environmentsthat lack visual diversity (e.g., space, arctic regions, windowlessoffices, prisons), the feeling of entrapment or being in a void createsserious mental consequences.

While technologies like virtual reality have the ability to pro-vide immersive experiences to “transport” people to other places,they are highly intrusive in terms of taking up the user’s atten-tion. In this research, we used projection and display technology asan ambient means to augment enclosed spaces with a fake digital“window” portraying nature landscape to examine how the illusionof being in a different environment influences the wellbeing andproductivity of people working in windowless offices. This wasexpanding on the work of Friedman et al. [5], where the researchesinstalled digital windows in university campus offices that showedlive outdoor footage of the campus. In this study, participants’ re-ported an increase in their connection to the social community andtheir psychological well being. However, the digital displays usedin this study were also used for work purposes, and were not apermanent architectural feature, thus in our study, we conceptual-ized our digital window as an interior ambient feature that wouldnot disrupt workflow but would still be noticeable by the personoccupying the space. We also aimed to quantify the effect of havingsuch an installment.

2 RESEARCH QUESTIONSChanging the environment to make people feel like they are in adifferent environment—whether that be a physical environmentand/or a social environment—taps into the concept of presence.Presence is a highly discussed construct with scholars having varieddefinitions of what it is [3], but the heart of the concept is thefeeling of “being there” [2]. It has been used mainly to describeimmersion when people use virtual environments or mediatedtechnology. Even though virtual reality can enhance presence [5],these experiences require a headset and interfere with other tasksthat require visual interaction outside of the virtual reality system.

Our proposed system is a less-intrusive scenario where a digitalwindow is placed on the wall of a room and is programmed with avideo to simulate a window with a live view of a nature landscape.This window could be created with a high-resolution projectionor a large physical display. This led to our decision of choosing a

Page 2: A Room With a 'Fake' View: Installing Digital Windows in … · 2020-07-01 · video to simulate a window with a live view of a nature landscape. This window could be created with

IMX ’20, June 17–19, 2020, Cornella, Barcelona, Spain Wohn et al.

Figure 1: An eight-hour video of a mountain and lake sceneon loop was played on a large display.

nature video with a wide vision view of sky, mountain, and lake.We chose to stick to an eight hour loop video to keep it consistentwith the duration of time each participant worked for.

While the windows can be programmed to display any scene,we are interested in the effect of green space. Access to greenspace has been shown to be associated with mental health [6]even if there is no physical activity in the green space. Seeingnature also helps with health recovery: a study on wellbeing andpatients in a hospital showed that patients in a window room hadshorter hospital stays [15]. Farley et. al (2001) found that peopleprefer places with windows with views of nature rather than non-windowed places [3].

Moreover, literature in landscape/urban planning and psychol-ogy shows a positive effect of seeing nature on happiness [9, 16].More recent big data analyses indicate that country-level happinessis correlated to green space as detected through satellite imagery[4].

While there are limited examples, the effect of nature appearsto still exist even if it is simulated [8]. For example, Radikovic’s[13] study presented a new use of display technology through anartificial window with motion parallax where participants couldcontrol the window view. The view of nature increased arousal,positive feelings, and reduced tension/other negative feelings.

While the correlation between green space and happiness is wellestablished, they do not indicate causality. It is unclear if simulatedgreen space (as opposed to real nature) will have the same positiveeffect, especially in an environment outside of the lab. Moreover,most previous studies did not focus on work environments, whichis a unique context because people are not looking out the window

Figure 2: Projections were used for tight office spaces

most of the time. Thus our first research question aims to look atwhether digitally-simulated greenery improves the well-being ofpeople occupying small work spaces:

RQ1: Does a digital window in a windowless office improvewellbeing over time?

While beautiful green scenery can make people feel better, itis unclear how this would influence work productivity. On theone hand, it could make people more productive, but it could alsodistract. Our second research question thus examines the effect ofthe digital window on productivity:

RQ2: Does a digital window in a windowless office improve ordeteriorate productivity over time?

3 METHODSWe decided to create a realistic digital window that displayed anature video. We found a nature video that depicts a window beingslightly open and bringing viewers into a scene of mountains anda lake. As the video plays, viewers will notice the slight breeze offog that rolls in through the foreground of the video; as well asthe trees and water moving in the background. Depending on thespace available in the office, participants either had a large display(Figure 1) or a wall projection (Figure 2). The typical dimensionsfor a window ranged from three to four feet, similar to the size ofwindows in offices that hadwindows. The large display we usedwasa 43 inch display. We kept this size consistent with the projection.

Before starting this experiment, locations needed to be estab-lished as well as window space. A pilot test was conducted to ensurethat our equipment would run smoothly as well as test the qualityof our nature scene display. This involved two participants thatwere part of a student club organization. The students remained ina windowless office for four to three hours of a day in a week. At theend of the week, each participant filled out an online survey abouttheir experience. Based on the pilot study feedback we changed thewindow by including a window frame since the test participantsdid not perceive the image to be a “digital window”.

Over the course of a week, we studied each participant in anenclosed office space. To recruit our participants we searched foroffices that were windowless and emailed the locations to verify ifwe could proceed with the testing. All of the participants were in

Page 3: A Room With a 'Fake' View: Installing Digital Windows in … · 2020-07-01 · video to simulate a window with a live view of a nature landscape. This window could be created with

A Room With a "Fake" View: Installing Digital Windows in Windowless Offices IMX ’20, June 17–19, 2020, Cornella, Barcelona, Spain

their office for majority of the day working on their computers. Dayone, we conducted the studywith two participants that were locatedin the same office room working for Audio Video Engineering,however, they were separated by cubicles. Given the environmentand condition of lighting system in the office room, we decided touse a TV Screen in addition to the projector. Participant 2 receiveda projection of the digital window. While participant 1 receiveda television projection of the window. Each participant was alsorequired to sign a consent form that had been approved by IRB, andhad to take a short survey before and after the intervention. Alongwith this, participants were told they would receive a 40 USD giftcard for their participation. During this time, we would turn theprojections on every morning and turned off at the end of theirworking hours.

After seven days had passed, we gave each participant the postsurvey similar to the initial survey and conducted individual exitinterviews. The interviews were audio recorded and transcribed.The process was repeated over the next three weeks, which includeda total of seven participants to our study. Each participant wasexposed to the digital window for seven days.

3.1 MeasuresWe had two measures related to productivity: productivity and flow.Productivity was a 10-item scale from Endicott Work ProductivityScale [2] that indicated the frequency of activities that were unpro-ductive, including items such as “In the past week, I have found itdifficult to concentrate on the task at hand” and “In the past week,I found myself daydreaming, worrying or staring into space whenI should have been working.” The answer options ranged from 1(never) to 5 (always). The 10 items were added to create a score; thehigher score indicates lower productivity.

Flow is a 4-item scale from Flow State Scale [11] that indicatedmeasure of immersion in work, including items such as “When I’min the office, time seems to alter (either slowed down or speed up)”and “When I’m in the office my attention is focused entirely onwhat I was doing”. The answer options ranged from 1 (stronglydisagree) to 5 (strongly agree). The 4 items were added togetherand divided by the number of questions; the higher score indicatesa greater work flow.

We had three measures of wellbeing, all based on establishedmeasures: happiness, mood, an anxiety.

Happiness was a 7-item scale from Oxford Happiness Question-naire [7] that indicated the frequency of happiness, including itemssuch as “At work, I find most things amusing” and “At work, I amintensely interested in doing other things”. The answer optionsranged from 1 (strongly disagree) to 5 (strongly agree). The 7 itemswere added together and divided by the number of questions; thehigher scores indicated higher levels of happiness.

Mood was a 6-item scale from Mood Scale (PHQ) [10] that indi-cated the mood of participants in that given week, including itemssuch as “I find myself moving slowly at work” and “I find myselfbeing fidgety or restlessness at work.” Participants had to rate theitems from 0 (Not at all) to 3 (Nearly every day). The 6 items wereadded to create a total score; the higher score indicates a lower orworse level of mood.

ID Type of office

P1 Shared office, CubicleP2 Shared office, CubicleP3 Solitary OfficeP4 Shared office, no cubicleP5 Shared office, no cubicleP6 Shared office, no cubicleP7 Shared office, no cubicle

Table 1: Type of office that participants primarily worked induring their work day.

Anxiety was a 4-item scale from Hamilton Anxiety Scale [1]that indicated anxiety levels of participants in that given week,including items such as “I have feelings of tension, fatigue, startleresponse, moved to tears easily, trembling, feelings of restlessness,inability to relax when I am at work” and “I have loss of interest,lack of pleasure in hobbies, depression, early waking, diurnal swingwhen I am at work”. The answer options ranged from 0 (not present)to 4 (very severe). The 4 items were added together to create a totalscore; the higher score indicates a higher level of anxiety.

4 RESULTS4.1 Statistical ResultsProductivity (lower score indicates higher productivity) went upfrom before the window intervention (M= 19.85, SD= 5.58) to afterthe intervention (M= 16.28, SD= 2.05). However, the difference wasnot statistically significant, t(6)=1.53, p=.178.

Flow increased from before the window intervention (M = 4.10,SD = .57) to after the intervention (M = 4.14, SD = .63). However,the difference was not statistically significant, t(6)= -.125, p = .905.

Sense of happiness increased from before the window interven-tion (M = 4.14, SD= .56) to after the window intervention (M =4.71, SD= .42). The difference was statistically significant, t(6)= -2.7,p=.036.

Mood (lower score indicates better mood) decreased from beforethe window intervention (M=8.9, SD =2.8) to after the window inter-vention (M =1, SD = 1.5). The difference was statistically significant,t(6) = 11.15, p= 0.

Anxiety (higher score indicates higher level of anxiety) decreasedfrom before the window intervention (M=2.6, SD= 2.07) to after thewindow intervention (M=1.42, SD =1.4). However, the differencewas not statistically significant, t(6)=1.7, p=.139.

4.2 Interview ResultsParticipants varied in response to their experience with the digitalwindow but were generally excited and happy about it. Q1 exploredwhether the participants felt that the window was realistic. P3 andP5 reported that the window felt realistic but the others did notfeel like the window was a real window. The type of technology(display or projection) did not seem to matter in terms of realness–in other words, all participants were acutely aware that the scenerywas not real.

Q2 asked what kinds of nature images will be good and pre-ferred for the digital window. Participants’ answers varied– some

Page 4: A Room With a 'Fake' View: Installing Digital Windows in … · 2020-07-01 · video to simulate a window with a live view of a nature landscape. This window could be created with

IMX ’20, June 17–19, 2020, Cornella, Barcelona, Spain Wohn et al.

ID Age Sex Occupation

P1 23 male Media ServicesP2 28 male Audio/Video EngineerP3 28 female Senior IT SpecialistP4 25 male Office AssistantP5 46 female Executive DirectorP6 27 male IT SpecialistP7 26 female IT Specialist

Table 2: Participant Table

preferred a beach scene or a blue sky with clouds. Others wantedto see animals. A couple participants also added that they wouldlike to hear audio of nature as well. P5 and P6 mentioned thatthey wanted to hear beach sounds or cricket chirping sounds. Thedesired nature audio, again, varied by individual.

Q3 asked participants about what they would want to change ifthey were to continue using the digital window. P1, P7 wanted tohave the window with a moving narrative image so that it followedthe time of the day. There would be a connection to the atmospherewhen it’s time to leave, for example, if it got dark outside as it gotcloser to the end of the day. In this case, a moving image is betterthan a still image. When asked about the format and style of thedisplay, all participants except for P2 preferred the projected imageto the large display.

Q4 explored whether after a one-week experiment, how par-ticipants’ reliance and dependence would lead to a change in theenvironment of a digital window, for example, how much desirewas there to have it open for longer. Six participants expressedsignificantly positive feelings about the development of the envi-ronment and desired to have the window for longer than sevendays. P1 explains that “I think it made a noticeable difference withinjust a week. I guess if it was a longer study, maybe I could see howit would affect busy times at the office.” P4 commented, “ I think ithelped me relax and calmed my mood sometimes.”

Q5 asked participants about their favorite part of the window.Most participants enjoyed the contents of nature video rather thanthe method of display. So they felt the presence of being close to theoutdoors even when they are in a windowless or basement office.P2 comment, “It was nice to walk into my office and see flowingtrees/mountains. I guess the outdoor element, and just having a bitof outdoors down here in basement land.”

Q6 asked participants about the most noticeable changes causedby the digital window. All the participants reported improvementsto their work environment. Despite the statistical results not be-ing significant, in the interviews, some participants said that itimproved their work itself as well as emotionally. This relates toour first research questions (Does a digital window in a windowlessoffice improve wellbeing over time?). P3 stated, “It can only im-prove your efficiency. Like I would say it improved my mood a bitbecause I was smiling when everybody was coming. P4 noted thatthe digital window reduced stressed, “Before, when I used to getbored at work, I only had the wall to stare at but with the window, ithelped me think of something constructive to do as well as calmingmy mood when I get stressed or overwhelmed.”

Q7 asked what was their least favorite part of the digital window.Most of the participants mentioned a desire for technical improve-ments, i.e., getting more realistic images. P7 mentioned that theframe of window image distracts seeing the nature image. In gen-eral, P7 did not experience any strong positive or negative effectsof the digital window. From this response we found that there isno correlation between the improvement and deterioration of aparticipants wellbeing over time (RQ2). He introduced himself assomeone who likes to get work done and go home, and that is allhe cares about during the work time so he is less concerned aboutthe work environment.

5 DISCUSSIONWe found that even though participants did not think the windowwas realistic, the video of nature that was played on the digitalwindows still had a positive effect on their mood and overall happi-ness. Although there was no statistical effect for improvement inproductivity, interviews suggest that the effects on productivity arequite variable, because some people found that having the windowmade them very productive and others not. This difference in indi-vidual preference may also have dampened the overall effect of thedigital window because our intervention showed a mountain andlake scene and people had different opinions on the type of scenethey wanted to see. If anything, the positive effect we found withthe mountain scene indicates that the effect could be even moreamplified with proper customization.

6 CONCLUSIONEven if they knew the digital window was not real, having a digitalprojection of nature scenery on the wall of a windowless officeincreased the sense of happiness and mood of people workingthere. This technically simple design may improve the wellnessof people living and working in enclosed spaces by giving theman alternative representation of a window by taking the physicalaspect of a window frame and combining it with a virtual displayto imitate an actual window. This experiment has increased theimplications of environment for humans wellbeing overtime.

7 FUTUREWORKBased on this preliminary study, future work should engage moreparticipants and also explore more long-term effects of having adigital window, since this intervention was only one week. Experi-ments including other nature-related modalities, such as olfactoryand audio stimuli, may lead to further insights about how natureinfluences wellbeing.

REFERENCES[1] J Gayle Beck, Melinda A Stanley, and Barbara J Zebb. 1999. Effectiveness of the

Hamilton Anxiety Rating Scale with older generalized anxiety disorder patients.Journal of Clinical Geropsychology 5, 4 (1999), 281–290.

[2] Jean Endicott and John Nee. 1997. Endicott Work Productivity Scale (EWPS):a new measure to assess treatment effects. Psychopharmacology bulletin 33, 1(1997), 13.

[3] Kelly MJ Farley and Jennifer Ann Veitch. 2001. A room with a view: A review ofthe effects of windows on work and well-being. (2001).

[4] Seyedeh FarnooshHashemi Fesharaki, Ali Behrouz, Jeasurk Yang, Donghee YvetteWohn, and Meeyoung Cha. 2020. Green Space and Happiness of DevelopedCountries. In 2020 IEEE International Conference on Big Data and Smart Computing(BigComp). IEEE, 247–250.

Page 5: A Room With a 'Fake' View: Installing Digital Windows in … · 2020-07-01 · video to simulate a window with a live view of a nature landscape. This window could be created with

A Room With a "Fake" View: Installing Digital Windows in Windowless Offices IMX ’20, June 17–19, 2020, Cornella, Barcelona, Spain

[5] Batya Friedman, Nathan G Freier, Peter HKahn Jr, Peyina Lin, and Robin Sodeman.2008. Office window of the future?—Field-based analyses of a new use of a largedisplay. International Journal of Human-Computer Studies 66, 6 (2008), 452–465.

[6] Patrik Grahn and Ulrika K. Stigsdotter. 2010. The relation between perceivedsensory dimensions of urban green space and stress restoration. Landscape andUrban Planning 94 (2010), 264–275.

[7] Peter Hills and Michael Argyle. 2002. The Oxford Happiness Questionnaire: acompact scale for the measurement of psychological well-being. Personality andindividual differences 33, 7 (2002), 1073–1082.

[8] Peter H Kahn Jr, Rachel L Severson, and Jolina H Ruckert. 2009. The humanrelation with nature and technological nature. Current Directions in PsychologicalScience 18, 1 (2009), 37–42.

[9] George MacKerron and Susana Mourato. 2013. Happiness is greater in naturalenvironments. Global Environmental Change 23 (2013), 992–1000.

[10] Alexandra Martin, Winfried Rief, Antje Klaiberg, and Elmar Braehler. 2006. Va-lidity of the brief patient health questionnaire mood scale (PHQ-9) in the general

population. General hospital psychiatry 28, 1 (2006), 71–77.[11] Jeanne Nakamura and Mihaly Csikszentmihalyi. 2009. Flow theory and research.

Handbook of positive psychology (2009), 195–206.[12] Lawrence A Palinkas and Peter Suedfeld. 2008. Psychological effects of polar

expeditions. The Lancet 371, 9607 (2008), 153–163.[13] Adrijan Silvester Radikovic. 2005. A true virtual window. Ph.D. Dissertation.

Texas A&M University.[14] Anna Scott. 2018. Can’t Find AnAffordable Home? Try Living In A Pod. Retrieved

from https://www.npr.org/2018/10/21/654426576/cant-find-an-affordable-home-try-living-in-a-pod.

[15] Roger Ulrich. 1984. View through a window may influence recovery. Science 224,4647 (1984), 224–225.

[16] Jennifer R. Wolch, Jason Byrne, and Joshua P. Newell. 2014. Urban green space,public health, and environmental justice: The challenge of making cities ‘justgreen enough’. Landscape and Urban Planning 125 (2014), 234–244.