Publications

Filter Publications

Select Research Themes

Select Authors

Select Publication Years

In the Orchard: Farm Worker Children’s Moral and Environmental Reasoning

2010 / Children, Development

Fig. 1. Developmental difference in use of biocentric reasoning categories. N= 40. Error bars= standard error of mean. ⁎χ2 (1, N= 40)= 5.23, pb.05, φ= .36, pb.05. In this study, farm worker children (N = 40) in 2nd and 5th grade were interviewed about (a) their conceptions and judgments of pesticide exposure and (b) their reasoning about the moral standing of nature. First, results showed that all participants negatively judged pesticide exposure based on moral obligatory criteria. Yet, most children accepted pesticide use in the orchards where they lived. Their reasoning was either based on assumptions that certain practices eliminated potential harms or coordination of potential physical harms with concerns for financial security. Second, participants expressed biocentric considerations (wherein nature is accorded moral standing) when reasoning about harms to nature. The results provide evidence of biocentric reasoning earlier than previously shown in the developmental literature, and indicate a developmental shift in the form of biocentric reasoning. Finally, the results offer support of a new methodology for disentangling human considerations from environmental moral reasoning.

Cohabitating With the Wild

2009 / Health and well-being

There is long-standing recognition that while an environmental-human discipline must do much else as well, it must ground its speculation ever anew in seeing. There is also recognition that there is as much merit to narrative as to argument. It is in this sense that this article seeks to see and to narrate, while its author is living on 670 acres of mountain land, an hour up a dirt road from the nearest town, off-line and off grid. The article focuses on what it means for an entity to be wild, how in our evolutionary past humans lived with wildness, and what of wildness might make sense in modern times. The central argument, more implied than stated, is that still today wildness remains part of the architecture of the human mind and body, and that to thrive as individuals and as a species we need to cohabitate with it.

The Human Relation with Nature and Technological Nature

2009 / Virtual nature

Figure 1. Examples of technological nature. HDTV plasma “windows” displaying real-time images of the local nature scene outside the building are shown (a) installed in a participant’s office in a long-term field study (Friedman, Freier, Kahn, Lin, & Sodeman, 2008); and (b) covering up a real window in the plasma-window condition of an experimental study in the lab (Kahn et al., 2008). The camera that recorded looking behavior can be seen poking out from the drapes to the left of the plasma window. The plasma screen was not present in the glass-window condition of the experimental study; and the drapes were pulled across the entire wall for the blank-wall condition. The bottom pictures show technological nature in the form of a robot dog (AIBO; from Kahn, Friedman, Perez-Granados, & Freier, 2006). In (c), the participant has just been introduced to AIBO and approaches the robot a little apprehensively. Within a couple of seconds, AIBO begins to move toward the participant; in (d), the participant is startled and appears slightly apprehensive (not unlike how a person might respond when encountering a biological dog that he or she has never met before). Two world trends are powerfully reshaping human existence: the degradation, if not destruction, of large parts of the natural world, and unprecedented technological development. At the nexus of these two trends lies technological nature—technologies that in various ways mediate, augment, or simulate the natural world. Current examples of technological nature include videos and live webcams of nature, robot animals, and immersive virtual environments. Does it matter for the physical and psychological well-being of the human species that actual nature is being replaced with technological nature? As the basis for our provisional answer (it is ‘‘yes’’), we draw on evolutionary and cross-cultural developmental accounts of the human relation with nature and some recent psychological research on the effects of technological nature. Finally, we discuss the issue—and area for future research— of ‘‘environmental generational amnesia.’’ The concern is that, by adapting gradually to the loss of actual nature and to the increase of technological nature, humans will lower the baseline across generations for what counts as a full measure of the human experience and of human flourishing. Technology has begun to change our species’ long-standing experiences with nature. Now we have technological nature—technologies that in various ways mediate, augment, or simulate the natural world. Entire television networks, such as the Discovery Channel and Animal Planet, provide us with mediated digital experiences of nature: the lion’s hunt, the Monarch’s migration, or a climb high into the Himalayan peaks. Video games like Zoo Tycoon engage children with animal life. Zoos themselves are bringing technologies such as webcams into their exhibits so that we can, for example, watch animals from the leisure of our home or a café. Inexpensive robot pets have been big sellers in the Wal-Marts and Targets of the world. Sony’s higher-end robot dog AIBO sold well. Real people now spend substantial time in virtual environments (e.g., Second Life). In terms of the physical and psychological well-being of our species, does it matter that we are replacing actual nature with technological nature? To support our provisional answer that it does matter, we draw on evolutionary and cross-cultural developmental accounts of the human relation with the natural world and then consider some recent psychological research on the effects of technological nature.

Office Window of the Future?—Field-Based Analyses of a New Use of a Large Display

2008 / Virtual nature, Office

Figure 1. HDTV Camera (circled) mounted on the roof of the university building (left). Brin at work in her office with the plasma display window (right). We installed large plasma displays on the walls of seven inside offices of faculty and staff at a university, and displayed, as the default image, real-time HDTV views of the immediate outside scene. Then, utilizing a field-study methodology, data were collected over a 16-week period to explore the user experience with these large display windows. Through the triangulation of data—652 pages of interview transcripts, journal entries, and responses to email inquiries—results showed that users deeply appreciated many aspects of their experience. Benefits included a reported increase in users’ connection to the wider social community, connection to the natural world, psychological wellbeing, and cognitive functioning. Users also integrated the large display window into their workplace practice. However, users expressed concerns particularly about the impacts on the privacy of people whose images were captured in the public place by the HDTV camera. Discussion focuses on design challenges for future investigations into related uses of large displays.

Designing for Human Values in an Urban Simulation System: Value Sensitive Design and Participatory Design

2004 / Urban, Participatory Design

UrbanSim is a large-scale simulation system that models the development of urban areas over periods of 20 or more years. Its purpose is to help citizens and local governments make more informed decisions about major transportation and land use issues, by projecting the long-term consequences of the different alternatives. Citizens often bring strongly held values to such decisions, for example regarding equity, sustainability, environmental protection, economic expansion, or property rights, and the decisions are often politically charged. To help shape the design of UrbanSim to better support the democratic process, as well as to be responsive to the values held by different stakeholders and the conflicts among them, we are using Value Sensitive Design, a theoretically grounded approach to the design of technology that seeks to account for human values in a principled and comprehensive manner throughout the design process. Participatory Design also has a good deal to say about these issues. Thus, in this paper, we first describe UrbanSim and Value Sensitive Design, and provide a snapshot of our ongoing work in this area. We then use the UrbanSim work as an example to bring out key commonalities and differences between Value Sensitive Design and Participatory Design, and to motivate some preliminary ideas about ways in which each methodology could evolve based on techniques and concepts from the other.

Children’s Affiliations with Nature: Structure, Development, and the Problem of Environmental Generational Amnesia

2002 / Children, Development

How do children reason about environmental problems? Are there universal features in children’s environmental conceptions and values? How important is it that children and young adults experience natural wonders? Finally, what happens to children’s environmental commitments and sensibilities when they grow up in environmentally degraded conditions? This chapter reports on the results of five studies that the author and various colleagues conducted. In these studies, children were interviewed in diverse locations about their environmental moral conceptions and values. The author also seeks to explicate two ideas that frame his theoretical approach to investigating children’s affiliations with nature–structure and development. Finally, the author builds on the structural-developmental framework and his research findings to articulate what may be one of the most pressing and unrecognized problems of the current age—the problem of environmental generational amnesia.

Beyond Toxicity: Human Health and the Natural Environment

2001

Research and teaching in environmental health have centered on the hazardous effects of various environmental exposures, such as toxic chemicals, radiation, and biological and physical agents. However, some kinds of environmental exposures may have positive health effects. According to E.O. Wilson’s “biophilia” hypothesis, humans are innately attracted to other living organisms. Later authors have expanded this concept to suggest that humans have an innate bond with nature more generally. This implies that certain kinds of contact with the natural world may benefit health. Evidence supporting this hypothesis is presented from four aspects of the natural world: animals, plants, landscapes, and wilderness. Finally, the implications of this hypothesis for a broader agenda for environmental health, encompassing not only toxic outcomes but also salutary ones, are discussed. This agenda implies research on a range of potentially healthful environmental exposures, collaboration among professionals in a range of disciplines from public health to landscape architecture to city planning, and interventions based on research outcomes.

The Human Relationship with Nature: Development and Culture

1999 / Development, Culture

Urgent environmental problems call for vigorous research and theory on how humans develop a relationship with nature. In a series of original research projects, Peter Kahn answers this call. For the past eight years, Kahn has studied children, young adults, and parents in diverse geographical locations, ranging from an economically impoverished black community in Houston to a remote village in the Brazilian Amazon. In these studies Kahn seeks answers to the following questions: How do people value nature, and how do they reason morally about environmental degradation? Do children have a deep connection to the natural world that gets severed by modern society? Or do such connections emerge, if at all, later in life, with increased cognitive and moral maturity? How does culture affect environmental commitments and sensibilities? Are there universal features in the human relationship with nature? Kahn’s empirical and theoretical findings draw on current work in psychology, biology, environmental behavior, education, policy, and moral development. This scholarly yet accessible book will be of value to practitioners in the social science and environmental fields, as well as to informed generalists interested in environmental issues and children.

Bayous and Jungle Rivers: Cross-Cultural Perspectives on Children’s Environmental Moral Reasoning

1997 / Children, Development

Two studies evaluated cross cultural perspectives of children’s moral and ecological reasoning as well as values about nature. The first study was conducted in Houston, Texas, with an inner city Black community. Subjects were 72 children from impoverished families. The results suggested that the serious constraints of living in an inner-city community cannot easily squelch Black children’s diverse and rich appreciation for nature, and moral responsiveness to its preservation. The second study, conducted in the Brazilian Amazon, is a modification of the Houston study. Subjects were 44 Portuguese fifth-grade children. The results suggested that Brazilian children do not exercise more biocentric reasoning than those in the Houston study. The two studies extend recent research in the moral developmental literature which suggests that, in important ways, individuals’ moral reasoning across cultures is similarly structured by concerns for human welfare, fairness, and rights. Inadequate attention to universal aspects of development in general, end morality in particular, would result in missing the many essential ways of being human, and underestimating common humanity.

Developmental Psychology and the Biophilia Hypothesis: Children’s Affiliation with Nature

1997 / Children, Development

A venturesome hypothesis has been put forth by Wilson (1984), Kellert (1996), and others and has been receiving increasing support. The hypothesis asserts the existence of biophilia, a fundamental, genetically based human need and propensity to affiliate with other living organisms. A review of the biophilia literature sets into motion three overarching concerns. One focuses on the genetic basis of biophilia. A second focuses on how to understand seemingly negative affiliations with nature within the biophilic framework. A third focuses on the quality of supporting evidence and whether the biophilia hypothesis can be disconfirmed. Through this critical examination, biophilia emerges as a valuable interdisciplinary framework for investigating the human affiliation with nature. Yet it is clearly a nascent framework, and some of its potential lies in charting a stronger ontogenetic course. Toward this end, in the second half of this article a structural–developmental approach is framed for investigating biophilia. Support for this approach is provided by discussing the author’s recent studies—conducted in the United States and in the Brazilian Amazon—on children’s environmental reasoning and values.

Along the Rio Negro: Brazilian Children’s Environmental Views and Values

1996 / Children

Children in urban and rural parts of the Brazilian Amazon were interviewed in Portuguese on how they understand and value their relationship with the natural environment. Forty-four 5th-grade children (mean age = 13 years, 8 months) participated. Children in both locations were aware of environmental problems, believed that throwing garbage in the Rio Negro harmed various parts of the environment (i.e., birds, insects, the view of the river, and people who live along the river), and cared that such harm might occur. Moreover, children believed that throwing garbage in the Rio Negro constituted a violation of a moral obligation. Children supported the conservation of the Amazon rainforest. Additional analyses showed striking similarities between this Brazilian population and a population of African American urban children in the United States

Environmental Views and Values of Children in an Inner‐City Black Community

1995 / Children, Black communities, Urban, Development

72 children across grades 1, 3, and 5 (mean ages, 7–5, 9–6, and 11–4) from an economically impoverished inner-city Black community were interviewed on their views and values about the natural environment. Assessments were made on whether children were aware of environmental problems, discussed environmental issues with their family, valued aspects of nature, and acted to help the environment. Additional assessments pertained to the prescriptivity and generalizability, and supporting justifications, of children’s normative environmental judgments based on a hypothetical scenario that involved polluting a waterway. Overall, children showed sensitivity to nature and awareness of environmental problems, although attenuated by both developmental and cultural factors. Most children believed that polluting a waterway was a violation of a moral obligation. Children’s environmental moral reasoning largely focused on homocentric considerations (e.g., that nature ought to be protected in order to protect human welfare). With much less frequency, children focused on biocentric considerations (e.g., that nature has intrinsic value or rights). Findings are discussed in terms of moral-developmental theory, and the place of social-cognitive research in understanding the human relationship to the natural environment.

A Plasma Display Window?—The Shifting Baseline Problem in a Technologically mediated Natural World

2008 / Virtual nature

Figure 2. Heart rate recovery from low-level stress. Values are the mean slope of heart rate (in beats per minute per minute (bpm/min)) during the first 60 s of each activity. Negative values indicate decreasing heart rate, and points lower on the graph represent more rapid decreases in heart rate. (The activities are ordered by the overall average slope across all six activities.) Humans will continue to adapt to an increasingly technological world. But are there costs to such adaptations in terms of human well being? Toward broaching this question, we investigated physiological effects of experiencing a HDTV quality real-time view of nature through a plasma display “window.” In an office setting, 90 participants (30 per group) were exposed either to (a) a glass window that afforded a view of a nature scene, (b) a plasma window that afforded a real-time HDTV view of essentially the same scene, or (c) a blank wall. Results showed that in terms of heart rate recovery from low-level stress the glass window was more restorative than a blank wall; in turn, a plasma window was no more restorative than a blank wall. Moreover, when participants spent more time looking at the glass window, their heart rate tended to decrease more rapidly; that was not the case with the plasma window. Discussion focuses on how the purported benefits of viewing nature may be attenuated by a digital medium.

Applying Novel Visitation Models using Diverse Social Media to Understand Recreation Change after Wildfire and Site Closure

2022 / Social media, Wildfires

Figure 1. Location of study sites in the Columbia River Gorge, USA. The area burned in the Eagle Creek Fire is shown in red. Sites are numbered from west to east. Names and closure and reopening dates are in Table S1. The purple star on the reference map shows the location of the study area in the USA. The Columbia River forms the border between Washington (to the north) and Oregon (to the south) in this region. Natural disturbances such as wildfires are increasing in severity and frequency. Although the ecological impacts of disturbance are well documented, we have limited understanding of how disturbances and associated management responses influence recreation use patterns. This reflects, in part, difficulty in quantifying recreation use across different land ownerships with inconsistent, or non-existent, recreation monitoring practices. In this study, we use visitation models based on social media to examine how recreation use changed after a wildfire and site closures in a large, mixed-ownership landscape. We find that wildfire and associated closures resulted in visitation loss to the recreation system as a whole and little site-to-site displacement within the system in the two years following the wildfire. Our study highlights the importance, when considering how wildfire and management may alter recreation use patterns, of considering the many factors that influence substitution behavior, including the relative locations of visitor origins, disturbances, and substitute sites.

Child-Nature Interaction in a Forest Preschool

2020 / Children, Nature school

Children participating in activities at Fiddleheads Forest School. In 2012 there were only around 25 nature preschools and kindergartens in the United States; now there are well over 250. It is a national movement that is gaining momentum. It is an exciting time because in principle these schools have within them the kernels to transform the world through increasing children’s direct interaction with nature and a more wild nature than that exists in most urban children’s lives. In this paper we begin to characterize forms of child-nature interaction that occur in one specific nature preschool, Fiddleheads Forest Preschool in Seattle, Washington, USA. Based on our observational data, derived through a randomized time-sampling methodology, we modeled child-nature interaction using what we call interaction patterns: characterizations of essential ways of interacting with nature described abstractly enough such that the pattern can be instantiated in different ways, across diverse forms of nature. Specifically, we use a nature language to describe (with photographs) eight interaction patterns: leaning on and hanging from supple tree limbs, climbing high in small tree, looking at wild animals, imitating animals, imagining nature to be something other than it is, making boundaries on earth, pushing the edges of boundaries, and waiting attentively in nature. Through an interaction pattern approach, we seek to provide insight into what is actually happening on the ground at a forest preschool and how that provides a key solution to the problem of environmental generational amnesia.

COVID-19, the Built Environment, and Health

2021 / COVID, Built environment + Urban design

Figure 1. Milan’s lazaretto, built just outside the city’s walls in the late 15th and early 16th centuries to house plague victims. Having outlived its usefulness, it was demolished about 400 y later. This part of Milan, Porta Venezia, is now a vibrant neighborhood of galleries and ethnic restaurants—or it was until COVID-19 struck. Source: Wikimedia Background Since the dawn of cities, the built environment has both affected infectious disease transmission and evolved in response to infectious diseases. COVID-19 illustrates both dynamics. The pandemic presented an opportunity to implement health promotion and disease prevention strategies in numerous elements of the built environment. Objectives This commentary aims to identify features of the built environment that affect the risk of COVID-19 as well as to identify elements of the pandemic response with implications for the built environment (and, therefore, for long-term public health). Discussion Built environment risk factors for COVID-19 transmission include crowding, poverty, and racism (as they manifest in housing and neighborhood features), poor indoor air circulation, and ambient air pollution. Potential long-term implications of COVID-19 for the built environment include changes in building design, increased teleworking, reconfigured streets, changing modes of travel, provision of parks and greenspace, and population shifts out of urban centers. Although it is too early to predict with confidence which of these responses may persist, identifying and monitoring them can help health professionals, architects, urban planners, and decision makers, as well as members of the public, optimize healthy built environments during and after recovery from the pandemic.

Monitoring Recreation on Federally Managed Lands and Waters—Visitation Estimation

2025 / Public land

Federally managed public lands and waters attract millions of visitors each year, generating significant economic benefits for surrounding communities. Accurate visitation data are crucial for guiding policy decisions and managing resources effectively. This report explores the methods employed by agencies to collect and use data on recreational visitation to Federal lands and waters. Visitation estimation practices across seven agencies are reviewed, revealing similarities such as the use of automated counters for on-site data collection, alongside differences in reporting frequencies, visit definitions, and public access to data. Emerging technologies, including social media, mobile device activity, and community science, are also evaluated for their potential to improve visitation estimation. Although these technologies offer promising opportunities, they come with challenges such as data biases, the need for calibration, costs, and privacy concerns. The report concludes with opportunities to enhance data collection, coordination, and accessibility, ensuring more efficient resource management and informed decision making. Related Media How Busy are National Parks and other Public Lands? Researchers Hone Methods for Estimating Visitation (June 2025)

The Benefits of Nature Experience: Improved Affect and Cognition

2015 / Health and well-being

Figure 2. Affective impact of nature experience. Difference scores are used to compare performance from before the walk to performance afterward (negative values indicate a decrease after the walk, while positive values indicate an increase). Each panel depicts these difference scores for the urban and nature groups separately on one of the four affective measures: (A) anxiety, (B) rumination, (C) negative affect, and (D) positive affect. Error bars depict standard error (SE) values. Highlights Nature experience produced clear benefits for affect (e.g., decrease in anxiety and rumination). Nature experience produced some benefits for cognition (complex working memory span task). Supports the idea that exposure to natural greenspace can improve affect and cognition. This study investigated the impact of nature experience on affect and cognition. We randomly assigned sixty participants to a 50-min walk in either a natural or an urban environment in and around Stanford, California. Before and after their walk, participants completed a series of psychological assessments of affective and cognitive functioning. Compared to the urban walk, the nature walk resulted in affective benefits (decreased anxiety, rumination, and negative affect, and preservation of positive affect) as well as cognitive benefits (increased working memory performance). This study extends previous research by demonstrating additional benefits of nature experience on affect and cognition through assessments of anxiety, rumination, and a complex measure of working memory (operation span task). These findings further our understanding of the influence of relatively brief nature experiences on affect and cognition, and help to lay the foundation for future research on the mechanisms underlying these effects. Related Media Nature May Be Key to Strengthening Our Attention (November 28, 2023)