Peter H. Kahn’s research while affiliated with University of Washington and other places

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Publications (78)


Forest terpenes and stress: Examining the associations of filtered vs. non-filtered air in a real-life natural environment
  • Article

March 2025

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20 Reads

Environmental Research

Chaja M. Levy

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Christopher D. Simpson

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[...]

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Quantifying Nature: Introducing NatureScore TM and NatureDose TM as Health Analysis and Promotion Tools

December 2023

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194 Reads

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9 Citations


Changes in well-being from pre-pandemic to one year later.
Mixed linear models assessing time spent interacting with nature and six domains of well-being.
Mixed linear models assessing six domains of well-being, accounting for access to nature.
Time Spent Interacting with Nature Is Associated with Greater Well-Being for Girl Scouts Before and during the COVID-19 Pandemic
  • Article
  • Full-text available

June 2023

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97 Reads

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3 Citations

The onset of the COVID-19 pandemic rendered daily life overwhelmingly difficult for many children. Given the compelling evidence for the physical and mental health benefits of interaction with nature, might it be the case that time spent interacting with nature buffered the negative effects of the pandemic for children? To address this question, we conducted a longitudinal investigation with a cohort of 137 Girl Scouts across two time periods: right before the onset of the pandemic (December 2019–February 2020) and one year later (December 2020–February 2021). We found that during the pandemic (compared to pre-pandemic), Girl Scouts fared worse on measures of physical activity, positive emotions, negative emotions, anxiety, behavioral difficulties, and problematic media use. However, by using mixed models, we also found that, on average, Girl Scouts who spent more time interacting with nature fared less poorly (in this sense, “did better”) on measures of physical activity, positive emotions, anxiety, and behavioral difficulties, irrespective of the pandemic. Further analysis revealed that these advantageous associations were present even when accounting for the amount of nature near each child’s home (as measured by the normalized difference vegetation index, percent of natural land cover, and self-reported access to nature). To the best of our knowledge, this is the first study investigating nature interaction and children’s well-being to use data collected from the same cohort prior to and during the pandemic. In addition, we discuss the importance of opportunities to interact with nature for children’s well-being during future periods of social upheaval.

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Children in Hong Kong interacting with relatively wild nature (vs. Domestic nature) engage in less dominating and more relational behaviors

February 2023

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46 Reads

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1 Citation

Might interacting with relatively wild forms of nature help move our world away from its largely domination-oriented and destructive sensibilities? Toward broaching this question, this study used an Interaction Pattern Approach to model child-nature interaction in a Hong Kong nature program. Observational video data were collected of 54 children (mean age 4.8 years) while they were playing in relatively wild or domestic landscapes. In total, 708 interactions were coded and categorized based on 37 distinct interaction patterns. Based on this modeling, we then tested two hypotheses: (1) that in the more domesticated nature areas, children would engage in more domination interaction patterns (e.g., catching wild animals), and (2) in the more wild nature areas, children would engage in more relational interaction patterns (e.g., cohabitating with wild animals). Both hypotheses were supported statistically. Discussion focuses on the importance of interacting with relatively wild aspects of nature, even in urban areas.



Beyond “bluespace” and “greenspace”: A narrative review of possible health benefits from exposure to other natural landscapes

October 2022

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455 Reads

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83 Citations

The Science of The Total Environment

Numerous studies have highlighted the physical and mental health benefits of contact with nature, typically in landscapes characterized by plants (i.e., “greenspace”) and water (i.e., “bluespace”). However, natural landscapes are not always green or blue, and the effects of other landscapes are worth attention. This narrative review attempts to overcome this limitation of past research. Rather than focusing on colors, we propose that natural landscapes are composed of at least one of three components: (1) plants (e.g., trees, flowering plants, grasses, sedges, mosses, ferns, and algae), (2) water (e.g., rivers, canals, lakes, oceans), and/or (3) rocks and minerals, including soil. Landscapes not dominated by plants or liquid-state water include those with abundant solid-state water (e.g., polar spaces) and rocks or minerals (e.g., deserts, caves). Possible health benefits of solid-state water or rock/mineral dominated landscapes include both shorter-term (e.g., viewing images) and longer-term (e.g., living in these landscapes) exposure durations. Reported benefits span improved emotional and mental states and medical treatment resources for respiratory conditions and allergies. Restorative and instorative mechanisms underlying health benefits consist of commonly discussed theories in the “greenspace” and “bluespace” literature, as well as less discussed pathways in that literature (i.e., post-traumatic growth theory, supportive environment theory, and place attachment). This is the first review to draw attention to the potential salutogenic value of natural landscapes beyond “greenspace” and “bluespace.” It is also among the first to highlight the limitations and confusion that result from classifying natural landscapes using color. Since the extant literature on natural landscapes - beyond those with abundant plants or liquid-state water - is limited in regard to quantity and quality, additional research is needed to understand their restorative potential and therapeutic possibilities.


Beyond "bluespace" and "greenspace": A narrative review of possible health benefits from exposure to other natural landscapes

August 2022

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670 Reads

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4 Citations

Numerous studies have highlighted the physical and mental health benefits of contact with nature, typically in landscapes characterized by plants (i.e., “greenspace”) and water (i.e., “bluespace”). However, natural landscapes are not always green or blue, and the effects of other landscapes are worth attention. This narrative review attempts to overcome this limitation in past research by pursuing the following objectives: (1) categorizing these natural landscapes, (2) summarizing the literature on health benefits of exposure to landscapes beyond "greenspace" and "bluespace," and (3) presenting the potential mechanisms underlying any health benefits derived from exposure to these other landscapes. We propose that natural landscapes are composed of at least one of three components: (1) plants (e.g., trees, flowering plants, grasses, sedges mosses, ferns, and algae), (2) water (e.g., rivers, canals, lakes, oceans), and/or (3) rocks and minerals, including soil. Landscapes not dominated by plants or liquid-state water include those with abundant solid-state water (e.g., polar spaces) and rocks or minerals (e.g., deserts, caves). Possible health benefits of solid-state water or rock/mineral dominated landscapes include both shorter-term (i.e., viewing images) and longer-term (i.e., living in these landscapes) exposure durations. Reported benefits span improved emotional and mental states and medical treatment resources for respiratory conditions and allergies.Restorative and instorative mechanisms underlying health benefits consist of commonly discussed theories in the "greenspace" and "bluespace" literature as well as less discussed pathways in that literature. Benefits of shorter-term exposure may be explained by attention restoration theory and stress reduction theory. Benefits of longer-term exposure may result from the cumulative effects of shorter-term exposures as well as psychological benefits explained by post-traumatic growth theory, supportive environment theory, and place attachment. Additional mechanisms may include distinct types of physical activity and immune system benefits, among others.This is the first review to draw attention to the potential salutogenic value of natural landscapes beyond "greenspace" and "bluespace." It is also among the first to highlight the limitations and confusion that result from classifying natural landscapes using colors. Since the extant literature on natural landscapes - beyond those with abundant plants or liquid-state water - is limited in regard to quantity and quality, additional research is needed to understand their restorative potential and therapeutic possibilities.


Change to average frequency of urban nature interaction among each racial/ethnic group.
Average sense of belonging in urban nature for each racial/ethnic group.
The automated stepwise variable selection process.
Average measurement values across racial/ethnic groups.
Inequitable Changes to Time Spent in Urban Nature during COVID-19: A Case Study of Seattle, WA with Asian, Black, Latino, and White Residents

August 2022

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90 Reads

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4 Citations

The COVID-19 pandemic has impacted everyone in urban areas. Some of these impacts in the United States have negatively affected People of Color more than their White counterparts. Using Seattle, Washington as a case study, we investigated whether inequitable effects appear in residents’ interactions with urban nature (such as urban green space). Using a 48-question instrument, 300 residents were surveyed, equally divided across four racial/ethnic groups: Asian, Black and African American, Latino/a/x, and White. Results showed that during the span of about 6 months after the onset of the pandemic, Black and Latino residents experienced a significant loss of time in urban nature, while Asian and White residents did not. The implications of these findings, including inequities in the potential buffering effects of urban nature against COVID-19 and the future of urban nature conservation, are discussed. Multiple variables were tested for association with the changes to time spent in urban nature, including themes of exclusion from urban nature spaces found throughout the existing literature. Findings show that decreases in time spent in urban nature among Black and Latino residents may be associated with their feeling as though they did not belong in urban nature. We provide recommendations based on these findings for how government agencies can promote more equitable access to urban nature during the pandemic and beyond. The results of this study have implications that extend beyond the US and are relevant to the international scholarly literature of inequities and urban nature interaction during the COVID-19 pandemic.


Citations (65)


... Appropriately attired, nature preschool children spend hours playing with and among the living and non-living materials and structures found in nature, even in inclement weather (Änggård, 2010;Sobel, 2014). Nature preschools began and continue to thrive in the Nordic region but in the last few decades have also become increasingly popular elsewhere, including in Germany, UK, Australia, and USA (Campbell & Speldewinde, 2019;Kahn et al., 2020;Lysklett, 2017;MacQuarrie et al., 2015;Schäffer & Kistemann, 2012). ...

Reference:

A Quantitative Comparison of Patterns of Play and Conflict in Nature Preschool and Traditional Preschool Children in Norway
Child-Nature Interaction in a Forest Preschool
  • Citing Chapter
  • March 2020

... They were asked to indicate all urban nature activities which they had enacted in fall 2019 and fall 2020. These data draw upon Interaction Pattern Theory, a way of characterizing the meaningful and instantiated ways in which people interact with nature [51][52][53][54]. These data were collected to add more depth to our understanding of how urban nature interaction changed during the pandemic, if at all. ...

Child-Nature Interaction in a Forest Preschool
  • Citing Chapter
  • May 2018

... Research suggests that even a view of nature from a window can reduce the risk of depression and anxiety [135]; furthermore, exposure to natural sounds can reduce anxiety, stress and annoyance while increasing positive emotions [221,222]. The quantity and quality of natural spaces can decrease mental healthcare utilization, including outpatient visits for those living with depression and bipolar disorder [223,224]. Designing therapeutic home environments for people with depression aims at increasing exposure to natural light, incorporating indoor elements that promote positive emotions and arousal through biophilic design and multisensory experiences [22]. ...

Quantifying Nature: Introducing NatureScore TM and NatureDose TM as Health Analysis and Promotion Tools
  • Citing Article
  • December 2023

... For example, the importance of play has long been understood to support the development of children (Dodd and Lester, 2021;Winnicott, 1971) and play in nature can proffer benefits to child development (Dankiw et al., 2020). Furthermore, there is evidence for children engaging in more relational interactions in 'wilder' nature versus more domestic settings (Weiss et al., 2023). Whilst there appears to be much gained from play and nature opportunities for children, it may also be that negative experiences can set up potential biophobic tendencies (Soga and Gaston, 2022) as well as the 'extinction of experiences' in nature (Soga et al., 2020). ...

Children’s interactions with relatively wild nature associated with more relational behavior: A model of child-nature interaction in a forest preschool
  • Citing Article
  • December 2022

Journal of Environmental Psychology

... One possible strategy for alleviating the negative effects of noise is to increase the amount of and access to nature. Several reviews demonstrate the health benefits of natural environments (Hartig et al., 2014;H. Li et al., 2023). Exposure to nature is associated with increases in positive affect (Hartig et al., 1996;Huang et al., 2020) as well as a reduction of physiological stress indicators such as blood pressure (Hartig et al., 2003) or skin conductance (Kawai et al., 2024;Ulrich et al., 1991). One prominent theoretical framework to explain this beneficial e ...

Beyond “bluespace” and “greenspace”: A narrative review of possible health benefits from exposure to other natural landscapes
  • Citing Article
  • October 2022

The Science of The Total Environment

... For the purposes of this literature review, the primary natural environments examined include forested areas, locations with abundant natural water sources, and nature immersion settings intentionally designed using biophilic principles. While other natural spaces, such as snowy landscapes (white spaces), deserts, flatlands, prairies (brown spaces), and volcanoes (red nature), are undoubtedly evocative [28], they were not the primary focus of this search. Instead, blue and green spaces-those depicting water and plant life-remain central to ecotherapy research and practice [28]. ...

Beyond "bluespace" and "greenspace": A narrative review of possible health benefits from exposure to other natural landscapes
  • Citing Preprint
  • August 2022

... Actor identities and discourses were also discussed as playing a role in connecting people to urban forests through sense of place and place attachment (Holstead et al., 2018;Nay et al., 2022). Recognizing pluralism in actor discourses and the unique context of place through site history and identity is important in 'place-making' or 'transforming urban space into place' (Audate et al., 2022). ...

Inequitable Changes to Time Spent in Urban Nature during COVID-19: A Case Study of Seattle, WA with Asian, Black, Latino, and White Residents

... If a child lives in a severely polluted environment, or if another child lacks direct contact with natural elements altogether, given that the textbooks insist that nature is inherently part of human living environments, both children are likely to develop a distorted concept of nature. All of us construct a conception of what is environmentally normal based on the natural world we encounter in our childhood (Kahn, 2022). ...

In moral relationship with nature: Development and interaction
  • Citing Article
  • January 2022

Journal of Moral Education

... However, research from environmental psychology offers promising frameworks for developing more effective soil conservation interventions. Studies have demonstrated the success of interventions in fostering a stronger connection to nature among adults (Coughlan et al., 2022), which in turn has been linked to increased pro-environmental behaviors (Deville et al., 2021). In addition, longitudinal research shows that interventions can effectively enhance pro-environmental behavior (Otto and Pensini, 2017). ...

Time Spent in Nature Is Associated with Increased Pro-Environmental Attitudes and Behaviors

... Urban rewilding and wild UGS can create and provide multiple benefits for urban residents. Firstly, wild UGS can offer room for human-nature (re)connection (Bauer 2005;Rink and Emmrich 2005;Palliwoda et al. 2017), and enhance human well-being (Burls 2007;Herman et al. 2021;Samus et al. 2022a;2022b) and resilience (Lev et al. 2020). Especially in light of the COVID-19 pandemic, research has demonstrated that wildness in UGS played a crucial role in enhancing human mental health and well-being (Samus et al. 2022a;Sikorska et al. 2023). ...

Relatively Wild Urban Parks Can Promote Human Resilience and Flourishing: A Case Study of Discovery Park, Seattle, Washington

Frontiers in Sustainable Cities