key: cord-1020606-j2mmlr47
authors: Xiang, Wei-Ning
title: Seven approaches to research in socio-ecological practice & five insights from the RWC–Schön–Stokes model
date: 2021-03-08
journal: Socio Ecol Pract Res
DOI: 10.1007/s42532-021-00073-8
sha: b73e7767145ee595cc71f1d75dca8d8a49ecabbe
doc_id: 1020606
cord_uid: j2mmlr47

In this review article, I examine seven commonly used approaches to research in socio-ecological practice and share insights about their defining characteristics, similarities, differences and connections. I derived these approaches and gained insights through the RWC–Schön–Stokes model, a theoretical framework for codifying, tabulating, examining and comparing multiple ways of methodical knowing in socio-ecological systems. For this reason, I begin with an introduction of the model and, in a chronological order, provide a review of its association with three intellectual ancestors: the Bush linear model (1945), the Stokes quadrant model (1997) and the Schön–Stokes model (2017).

In a 2017 article "Pasteur's quadrant: an appealing ecophronetic alternative to the prevalent Bohr's quadrant in ecosystem services research" (Xiang 2017) , I propose the Schön-Stokes model of research in socio-ecological systems (the Schön-Stokes model, for short) with a dual intention: to respond to an important research question and to inspire a new line of inquiry.

In this 2017 article, I raise the following question concerning the widely acknowledged untenable status quo the enterprise of ecosystem services research found itself in while pursuing the honorable ambition to facilitate practitioners in socioecological practice (Xiang 2017 (Xiang , p.2242 ) 1 :

Why is it that a scholarly enterprise aiming to inform, influence, or even direct practitioners [sic] demonstrated so little research interest in practical implementation and made so insignificant effort to push the envelope? 2

The question was intriguing and motivated me to conduct an extensive search for explanations. The search first led to the development of an overarching theoretical frameworkthe Schön-Stokes model (Xiang 2017 (Xiang , pp.2242 (Xiang -2245 ; it then enabled me to dig for answers through this new lens of high magnifying power. In the end of this process, I was able to bring to light a rarely explicated explanation which is arguably more plausible than those previously available. That is, ecosystem services researchers' blanket adoption and uncritical use of a pure basic research approach from Bohr's quadrant in the Schön-Stokes model (Ibid., pp.2242-2243; a detailed account of Bohr's quadrant is provided later in Sect. 2 of this article).

The Schön-Stokes model also inspired me to raise a series of questions with special reference to the practical implementation and ensuing impacts of the ecosystem services knowledge that researchers produced and reported in credible publications [For these questions, see Xiang (2017 Xiang ( , p.2241 ]. This later led to the development of a new line of inquiry-the knowledge implementation & impact research (i.e., knowledge I&I research)-which aims to benefit both socio-ecological practice and socio-ecological practice research [Xiang 2019a, p.10, p.12; 2019b, pp.1-2] .

Since then, the model and its undergirding ideas have been gaining traction among scholars from around the world. They were used to serve essentially the same dual purpose across different areas of socio-ecological practice and research: responding to intriguing research questions and inspiring new lines of inquiry. Below are a few examples.

In 2020, a team of scholars was commissioned by the National Academies of Sciences, Engineering and Medicine of the USA to conduct a project entitled "Advancing a systems approach to studying the earth: a strategy for the National Science Foundation" (the National Academies of Sciences, Engineering and Medicine 2020). On November 20, at "Integrating earth systems science and engineering: a virtual workshop," they asked, "How may systems thinking approaches vary between systems thinking in engineering versus systems thinking in the natural and social sciences?"

To respond to their question, in an invited presentation at the workshop, I used an updated version of the Schön-Stokes model as a frame of reference to highlight the differences and similarities among seven ways of methodical knowing-approaches to research-in socio-ecological systems (Xiang 2020a ). This 2020 version will be presented in Sect. 4 of this article and the seven approaches discussed in Sects. 5 and 6.

In addition, the Schön-Stokes model and its undergirding ideas have inspired many other inquiries. These include, inter alia, 1. demonstrating the differences between theories of practice and theories of science, between practitioner-theorists and academic theoreticians (Xiang 2020b, pp.122-123) ; 2. explaining "a gulf [that] commonly divides theory and practice in scholarly literature" (Bryant & Turner 2019, p.328 ); 3. substantiating a "crucial" paradigm shift "from the traditional Bohr's quadrant to Pasteur's quadrant" in ecosystem services research (Feng et al. 2019, p.111 ); 4. characterizing the knowledge domain of ecopracticology-the study of socio-ecological practice (Xiang 2019a, pp.8-9) and categorizing research article types for the journal Socio-Ecological Practice Research (Xiang 2019b , pp.1-2); 5. showcasing exemplary works of Scottish-American scholar-practitioner Ian McHarg (Bryan & Turner 2019, p.328, p.335; Xiang 2019c, pp.362-363; Yang & Li 2019 , p.210); 6. advocating the key yet overdue action to "overhaul entrenched mindset and inertia" in urban forestry practice and research (Jim 2019, p.49) ; 7. justifying the need for knowledge brokering in the socio-ecological practice of urban green infrastructure planning and analyzing the challenges (La Rosa 2019, pp.89-90; Wang et al. 2018, p.141) ; 8. conceptualizing an empirical survey in urban green infrastructure research (Hagemann et al. 2020, p.286) ; and 9. developing a "problem-research-practice framework" for improving the practical relevance of ecosystem services mapping (Chen et al. 2019, p. 2).

The Schön-Stokes model is a retrofit of a 1997 quadrant model of research by American political scientist Donald Stokes (1927 Stokes ( -1997 and as such inherits much of the intellectual merit and representation power from its ancestor. This intellectual root is elaborated next before a full-scale presentation and an update of the Schön-Stokes model in Sects. 3 and 4, respectively. to the President of the USA (Bush 1945 

In constructing the quadrant model, Stokes began with an analysis of the goals of understanding and use in scientific and technological research. He recast the widely accepted view of the tension between the two (Armacost 1997, p.vii) vividly via two intersecting straight-line axes, each presenting one of what he called the "dual dichotomy" of research motivations (Stokes 1997, p.72; see Fig. 2 ). On the "fourfold table with cells or quadrants" such derived (Ibid.), he subsequently defined the quadrants and instantiated them with conspicuous examples of distinguished researchers.

Here, Donald Stokes used the term "quadrant" as a synonym for an ensemble of approaches to research. Philosophers of science would interpret "quadrant" as a synonym for paradigm of methodical knowing or research. In planning literature published in Chinese language, "quadrant" in this context is translated as 范式(paradigm) [e.g., Xiang (2020e, pp.viii-x) ].

He labeled the upper left cell in the table (Fig. 2) as Bohr's quadrant of pure basic research and noted that Niels Bohr (1885 Bohr ( -1962 , the Danish physicist and the 1922 Nobel laureate in physics for his contributions to the understanding of atomic and molecular structure and quantum theory (Aaserud 2020) , "brilliantly exemplified the scholar-scientist engaged in a pure search for understanding." (Stokes 1997, p.24 ) "[H]owever much his ideas later remade the world," added Stokes, "clearly Niels Bohr's quest of a model atomic structure was a pure voyage of discovery." (Ibid., p.73).

He called the lower right cell Edison's quadrant of pure applied research and acknowledged that Thomas Edison , the self-educated American inventor and businessman who held 1,093 US patents in his name (Conot et al. 2020 ; US National Archives & Records Administration 2020), "exemplified the applied investigator wholly uninterested in the deeper scientific implications of his discoveries." (Stokes 1997, p. 24) The designation is appropriate, he explained, because it is reminiscent of "how strictly this brilliant inventor kept his co-workers at Menlo Park [in New Jersey], in the first industrial research laboratory in America, from pursuing the deeper scientific implications of what they were discovering in their headlong rush toward commercially profitable electric lighting." (Ibid., p.74 (Stokes 1997, p.10)] In between these two, on the upper right corner is Pasteur's quadrant of use-inspired basic research, named after French chemist and microbiologist Louis Pasteur (1822-1895) who was known for his discoveries of the scientific principles of vaccination, microbial fermentation and pasteurization (Ullmann 2020) . Explaining this designation, Stokes wrote, the blend of applied research with basic research was "characterized virtually the whole of Pasteur's later career. He probed ever more deeply into the processes of microbiology by accepting applied problems [i.e., realworld problems practitioners encountered] … Many of his detailed lines of inquiry, such as the experiments by which he developed the process of the 'pasteurization' of milk or his experiments in growing attenuated bacterial strains to immunize patients from disease, are unintelligible apart from his applied goals [of solving real-world problems practitioners encountered]. The mature Pasteur never did a study that was not applied, as he laid out a whole new branch of science [of microbiology]." (Stokes 1997, p.13). 4 Finally, he noted that the lower left-hand quadrant, "which includes research that is inspired neither by the goal of understanding nor by the goal of use, is not empty [sic] ." (Stokes 1997, p.74 ) Instead, the research in this quadrant could be motivated by a range of factors, including curiosity, circumstantial needs and utilitarian considerations (Ibid., pp.74-75). Further, regardless their motivations, "studies in the fourth quadrant can be important precursors of research in Bohr's quadrant, as it was in the case of Charles Darwin's masterpiece The Origin of Species, as well as of research in Edison's quadrant." (Ibid., p.75) He nonetheless did not fill the quadrant with a description, nor did he give a name to it (Fig. 2 ).

With the fourfold table (Fig. 2) , Donald Stokes in fact identified and presented four distinct approaches to research in science and technology, each exemplifying a "category" of alike approaches in a quadrant (Stokes 1997, pp.73-74) .

Here, an approach to research is a way of methodical knowing and acting that over the years researchers, be they scientists or non-scientists, have developed, used and retrofit in their professional and/or academic practice and is later codified by researchers themselves or others (Xiang 2020a) . These four approaches are (1) curiosity-inspired pure basic research for understanding, as exemplified by the work of Niels Bohr; (2) use-inspired basic research for understanding and use, by the work of Louis Pasteur; (3) use-inspired pure applied research for use, by the work of Thomas Edison; and (4) free roam, precursor research.

It is noteworthy that all four approaches identified, according to Stokes, are equally applicable to research in natural, physical and social sciences. For example, he noted, "this category [of use-inspired basic research for understanding and use in Pasteur's quadrant] includes the major work of John Maynard Keynes, the fundamental research of the Manhattan Project and Irving Langmuir's surface physics." (Stokes 1997, p.74 ) 5 Some of these approaches might even be applicable to the humanities as well. Underlying the free roam, precursor research approach in the fourth quadrant, for example, is "a conception more at home with the broader German idea of Wissenschaft than it is with French and Anglo-American ideas of science." (Ibid.) 6 It must also be acknowledged that one unstated premise here is that there is a one-to-many relationship between quadrant and category of approach to research-a quadrant can include more than one category of approach to research. Manifesting this premise is Stokes' delicate use of the phrase "includes [a category of approach to] research," instead of "consists of," when describing the composition of each quadrant. For example, he stated that "[t]he lower right-hand cell [i.e., the Edison's quadrant in Fig. 2 ] includes research that is guided solely by applied goals without seeking a more general understanding of the phenomena of a scientific field." (Stokes 1997, p.74 ; italic by the author of this article) He used "this category [of research]" and "such a category [of research]" in each of the four quadrant definitions (Ibid., . This underlying premise, unstated yet manifested, provides an opportunity for the quadrants 5 John Maynard Keynes (1883 Keynes ( -1946 , British economist (The Editors of Encyclopaedia Britannica 2020a); the Manhattan Project, a US government research project (1942) (1943) (1944) (1945) that produced the first atomic bombs (The Editors of Encyclopaedia Britannica 2020b); Irving Langmuir (1881-1957), American physical chemist who was awarded the 1932 Nobel Prize for Chemistry (Rice 2020) . 6 Often translated as science in the English language (e.g., Merriam-Webster.com Dictionary 2020a), the German word Wissenschaft has a much broader meaning and includes humanities (van Bommel 2015, p.4). As a mass noun (Oxford English and Spanish Dictionary 2020), historically, it includes both "higher sciences" ("höhere Wissenschaften") and "faculty sciences" ("Fakultätswissenschaften"). The former category includes, inter alia, mathematics, physics, poetry, architecture, painting, music and dance; while the latter theology, law and medicine (Ibid.).

What does "The mature Pasteur" mean? Stokes explained, "[t] his mix of goals [of fundamental understanding and use] was not visible in the young Pasteur. The 22-year-old chemist who immersed himself in the enigma of racemic acid was engaged in a pure quest of understanding… [But] as Pasteur's scientific studies became progressively more fundamental, the problems he chose and the lines of inquiry he pursued became progressively more applied." (Stokes 1997, p.13) [2] In a 2018 article, Dutch scholar of science and innovation Robert J.W. Tijssen adds a third dimension of "[research] outputs and impacts" to the 1997 Stokes model and expands Pasteur's Quadrant to what he calls "Pasteur's Cube" (Tijssen 2018 (Tijssen , p.1630 (Tijssen & p.1632 to include more research approaches. This opportunity is indeed seized and materialized in the RWC-Schön-Stokes model, as shown later in Sect. 4 of this article.

Between 2016 and 2017 while working on an ecosystem services research project, I recast the Stokes quadrant model and named the descendant (Fig. 3 ) the Schön-Stokes model of research in socio-ecological systems (the Schön-Stokes model, for short). The name is so given that it acknowledges the inspirations from the intellectual heritage of both Donald Stokes and American philosopher and planning scholar Donald Schön (1930 Schön ( -1997 and highlights the new model's suitability for research use in socio-ecological systems. As exhibited at the beginning of this article (see Sect. 1), not only did the retrofit model help achieve two immediate research goals of the project, but it also started to gain traction among scholars from around the world. What is new in the Schön-Stokes model (Fig. 3 ) that makes it suitable for research use in socio-ecological systems?

Compared to its ancestor (Fig. 2 ), the 2017 model has four added components. These are (1) a newly formulated dual dichotomy; (2) two distinctive classes of social system problems; (3) three additional approaches to researchapplied basic research, practice research and action research; and (4) designation of Johnson's quadrant. The first two are directly responsible for model's transformation and will be discussed below in the rest of this section. The three research approaches (the third added component) have been undergoing further development ever since and will be discussed in Sects. 4 and 5 with updates. An explanation of the designation of Johnson's quadrant was provided in Xiang (2017 Xiang ( , p.2243 ).

The Schön-Stokes model includes two new research motivations, "interest in problems of high ground" and "interest in problems of lowlands"; and couples them, respectively, with the two preexisting research motivations (i.e., research goals) inherited from the Stokes quadrant model-"quest for fundamental understanding" and "consideration of use." This leads to two combined research motivations, "quest for fundamental understanding & interest in problems of high ground" and "consideration of use & interest in problems of lowlands." It then formulates a new dual dichotomy of research motivations and presents it via two intersecting axes (Fig. 3) .

It should be noted that in Fig. 3 , each ax exhibits a dichotomy of discrete yes or no categories on a continuum ranging from zero to infinity. This mixed way of presentation is inspired by and reflective of a dialectic view of Stokes'. In presenting the 1997 quadrant model, Stokes wrote, "There is not the slightest reason to think of these dimensions [of understanding and use] only in dichotomous terms, since there can be many degrees of commitment to these two goals. But if we do so for heuristic reasons, it is clear that we now have not one dichotomy but two." (Stokes 1997, p.72 ). [From Xiang (2017 , p.2243 , after Schön (1987 Schön ( /2001 and Stokes (1997, p.73 

Thanks to the above-mentioned coupling of research interests with research goals, two classes of social system problems are brought into play in the newly formulated dual dichotomy: problems of lowlands and those of high ground. Their presence in the newly formulated dual dichotomy helps make the Schön-Stokes model suitable for socio-ecological systems generally and for socio-ecological practice and socio-ecological practice research specifically.

In 1987, Donald Schön presented these two classes of social system problems in a dichotomous setting of social practice research (Schön 1987 (Schön /2001 ). According to him, when conducting research in the varied fields of social practice (e.g., education, law, medicine, management, planning and engineering), members of the research community are confronted with an important choice. Metaphorically, the choice is between descending to "the swampy lowlands" of real-world practice and standing on "the high ground" of ivory tower theory (Schön 1987 (Schön /2001 ; associated with this dichotomous situation are two distinctive classes of social system problems. He wrote figuratively,

On the high ground, manageable problems lend themselves to solution through the use of researchbased theory and technique. In the swampy lowlands, problems are messy and confusing and incapable of technical solution. The irony of this situation is that the problems of the high ground tend to be relatively unimportant to individuals or to society at large, however great their technical interest may be, while in the swamp lie the problems of greatest human concern. (Ibid.)

Of these two classes of social system problems, Donald Schön did not provide detailed account about the defining characteristics; nor did he acknowledge the groundbreaking seminal work on the very topic which, by the time of his writing, had been in existence for almost two decades (see 3.3.2 below). Nonetheless, the association he established here between research ambitions and target social system problems is brilliant. It is in fact the direct fountainhead of inspiration for the above-mentioned coupling of research interests with research goals in the new dual dichotomy of research motivations.

"How is it that we can get to the moon when we can't get to the airport?".

Asked American planning scholar Melvin Webber in a 1973 lecture at the University of Reading, UK (Batty 2014, p.30) . With this intriguing leading question of fabled words, he enunciated the two classes of social system problems Donald Schön later noted only inexplicitly in 1987.

In the late 1960s, Melvin Webber and two fellow American scholars, Horst Rittel (1930 Rittel ( -1990 and West Churchman (1913 -2004 , collectively identified a distinctive "class of social system problems which are ill-formulated, where the [available] information is confusing, where there are many clients and decision makers with conflicting values and where the ramifications in the whole system are thoroughly confusing … [such that] proposed 'solutions' often turn out to be worse than the symptoms" (Churchman 1967, p.B-141) . In the two seminal articles (Churchman 1967; Rittel & Webber 1973) , they call these "wicked problems" and foresee that acknowledging their intractability and ubiquity would prompt a change in the ambitions and approaches of those charged to study and attend to them (Xiang 2013, p.1). 8 As such, when asking the leading question about why "we can't get to the airport" at Reading in 1973, Melvin Webber must have had wicked problems in mind (Batty 2014, p.30) .

The three American scholars named the other class of social system problems "tame problems". Being the primary research targets of mathematics, physical and natural sciences, technology and engineering, these problems could be extremely complicated but are "benign", "docile" and most definitely solvable (Rittel et al. 1973, p.160) . Examples include, but are not limited to, the Goldbach Conjecture (Hosch 2009 ); atomic and molecular structure (Aaserud 2020) ; the technical obstacles to many Edison's inventions (Conot et al. 2020 ); preservation of beer, wine and milk (Ullmann 2020) ; and vaccination against anthrax and rabies (Ibid.). Unlike their wicked counterpart, tame problems often have exhaustive, crystal clear formulations (Rittel et al. 1973, p.161) , as exemplified by the ambitious yet well-defined goal to "get to the moon" in Melvin Webber's leading question; and their solutions can be tested and determined "on the spot" (Ibid., p.163).

Over half of a century later, it is now widely recognized that wickedness, the ubiquity of wicked problems, is the norm in social systems of all kinds, including socio-ecological systems where human-human (social-economic-political-cultural-…) relations and human-nature (ecological) relations are intertwined with each other (Xiang 2013, p.2; 2019a, p.8) . Wicked problems are present in essentially all issue areas of socio-ecological practice that matter to the human society today (Xiang 2013, p.2; 2019a, p.8) , ranging from global climate change adaptation and mitigation, human sustainability, urbanization, to poverty, hunger and the ongoing common threat imposed by the COVID-19 pandemic, 9 to list just a few. Therefore, the inclusion of both wicked problems and tame problems, in the forms of "problems of lowlands" and "problems of high ground," respectively, helps transform the Stokes quadrant model into a new model that is suitable for research use in socio-ecological practice and socio-ecological practice research (Xiang 2017 (Xiang , p.2442 . It is indeed an important addition.

As mentioned at the beginning of the article (subsection 1.2), I presented an updated version of the Schön-Stokes model at a workshop on November 20, 2020. Using it as a frame of reference, I highlighted the differences and similarities among seven approaches to research in socio-ecological systems (Xiang 2020a) . In this updated version, which I call the RWC-Schön-Stokes model of research in socio-ecological systems (the RWC-Schön-Stokes model, for short; see Fig. 4 ), I include the following changes:

1. In lieu of "problems of lowlands" and "problems of high ground," their more rigorously defined and widely accepted counterparts, "wicked problems" and "tame problems," are used in the definitions of research interests; The inclusion of three additional research approaches is strategic and justified. As explicated below in Sect. 5, these approaches to research are inherently "down-to-earth" in that they are developed and/or used by non-scientist researchers and/or applied scientist researchers in socioecological practice. For example, Ian McHarg, whose outstanding work exemplifies one of the three approaches, once proudly claimed himself a "crypto-pseudo-quasi-scientist" (McHarg 2007, p.21; Xiang 2019c, p.361) . The presence of these approaches thus broadens the scope of the RWC-Schön-Stokes model significantly and makes it more relevant to and workable in socio-ecological practice and socio-ecological practice research. Further, incorporating additional research approaches is legitimate and permissible because of a premise underlying the 1997 Stoke quadrant model (discussed in subsection 2.3). That premise states that 9 A common threat is by definition a danger-something or someone that can hurt or harm people-that might happen to every individual human being in a certain place (e.g., the earth, a country, a region, a city, a village, a community, etc.) to the extent that no one in that place is immune. The common threat imposed by the COVID-19 pandemic is a super wicked problem [Daniels et al. 2021 , section "3 A counterfactual scenario for coping with the super wicked COVID problem by Jeffrey Chan"; Palko & Xiang 2020, p.260; Xiang 2020c, p.200 ; and footnote 9 in Xiang (2021) ]. 10 The use of "approach to," instead of "approach of," in the naming of the seven approaches reflects the belief that there may well be other ways to conduct these three categories of research. For example, the McHarg approach is one way to conduct "use-inspired practice research for practice & understanding." there is a one-to-many relationship between quadrant and category of approach to research-a quadrant can include more than one category of approach to research.

In compliance with the convention Donald Stokes used in defining the four approaches to research in his 1997 quadrant model (see first paragraph in subsection 2.3), I defined the three newly added approaches (see Fig. 4 ) via three real-world examples (Xiang 2020a) . In each example, the approach a noted researcher used (but not necessarily developed) in socio-ecological practice exemplifies a corresponding approach in the RWC-Schön-Stokes model. R. Buckminster Fuller (1895 -1983 is an American engineer and architect. As "one of the most original thinkers of the second half of the twentieth century," he "was noted for unorthodox ideas on global issues" (Marks 2020) . He believes that following "a strategy that aimed at a radical solution of world problems by finding the means to do more (Budds 2016) . It exemplifies cogently a curiosity-inspired approach to knowledge brokering research in socio-ecological practice.

Knowledge brokering is a process through which knowledge brokers "foster the linkage between the creators and users of knowledge" (Ward et al. 2009, p.269 ) and aim to "mobilize" or "inject" knowledge into users' decision-making activities (Kislov et al. 2017, p.111; Twiss 1975, p.235; Xiang 1996, p.1 & p.8) . Knowledge brokers here are applied scientist researchers or non-scientist researchers who help enable knowledge flow across previously separated groups of knowledge creators and users (Kislov et al. 2017, p.111; Ward et al. 2009, p.269) . Out of the three presently codified classes of knowledge brokering activities-knowledge management, linkage and exchange and capacity building, only is knowledge management the best understood and most used in practice (Kislov et al. 2017, p.108; Ward et al. 2009, p.269 ) mainly because it is less time-consuming, less resource-intensive and easier to capture (Kislov et al. 2017, p.108 ). R. Buckminster Fuller's 1960 proposal exemplifies a common brokering activity of knowledge management, that is, sharing research results with decision makers and practitioners through experiments and/or demonstrations. Despite widely acknowledged as ineffective across many professional fields (Barber & Rodman 1990, p.26; Ward et al. 2009, p.269; Xiang 2017 Xiang , pp.2242 Xiang -2244 2019c, p.363) , knowledge brokering activity of this kind remains popular and prevalent in socio-ecological practice and research (Xiang 2017 (Xiang , pp.2242 (Xiang -2244 2019c, p.363). 11 Furthermore, R. Buckminster Fuller's 1960 proposal exemplifies an approach to knowledge brokering research in socio-ecological practice that is primarily curiosity-driven. Under such an approach, researchers are inspired by both a general but strong sense of social responsibility and a genuine curiosity about whether or not and exactly how the "pure, objective and rational" knowledge (Cook & Spray 2012, p. 93) can be made relevant to and even actionable for the solution of real-world problems. Like the "creators" of this objective knowledge who are engaged in curiosity-inspired pure basic research for understanding in Bohr-Fuller's quadrant, most if not all of these "translators" also have little if any interest in attending to inherent wickedness in the real-world problems (Barber & Rodman 1990, p.26) . Their pertinent research pursuits are often funded through grants by a third party from outside the planning or design region and mainly focused on more effective translation and better communication of scientific theories and technological advancement to "inform," "influence" and "improve" practice (Palmer 2012, p.6 ). Xiang 2019a, p.7 & p.9; 2019c, p.359 & p.367; 2019d, p.165) . Through writing, practice and advocacy, he "fundamentally changed socio-ecological practice and research" (Steiner & Fleming 2019, p.173 ); many of his ideas, methods and theories have been and continue to be benefiting diverse fields, ranging from ecological planning and design, geographic information science, environmental sciences, geography, to law, the social sciences and even the humanities (Herrington 2010, p.1, pp.16-17; Steiner 2019a, p.34, p.36; Steiner & Fleming 2019, p.173 ). 12 12 [1] A collection of most recent articles on Ian McHarg's enduring legacy is published in a 2019 special issue of this journal (volume 1, combined issue 3-4). It is entitled Design With Nature at 50: retrospect and prospect and guest-edited by American landscape archi-11 A more recent example is the proposal of stratospheric albedo modification (Cziczo et al. 2019; McClellan et al. 2012) . In this proposal, researchers suggest that particulates of sulfur compounds be dispersed in the stratosphere of the earth's atmosphere and demonstrate how this engineering operation could reduce the effective solar flux entering the atmosphere and thus cool surface temperatures of the earth.

As such, his work indeed manifests and exemplifies a three-pronged approach to socio-ecological practice research under which a research project (1) originates from practice, (2) proceeds for practice and (3) goes beyond practice. This approach is commonplace among other noted scholar-practitioners. These include, but are not limited to, Chinese urban planner Huang Guangyu [黄光宇 (1935 Guangyu [黄光宇 ( -2006 ], American landscape planner John T. Lyle (1934 Lyle ( -1998 , "the 'father of American landscape architecture '-Frederick Law Olmsted, Sr." (1822 -1903 (Fabos 1979, p.48) , American landscape architects and educators Julius Gy. Fabos and Frederick R. Steiner and American conservationist Aldo Leopold (1887-1948) . 13

The Chinese engineer Li Bing (李冰) lived in China during the Warring States period (480 bc-221 bc). 14 As the general manager of Shu county (蜀郡) in the Qin Kingdom (秦国), he masterminded and led the construction of one of the world's oldest large-scale ecological-hydraulic projects (Needham et al. 1971, p.288; Xiang 2014, pp.65-66) . The Dujiangyan irrigation system (都江堰灌溉系统) was first built in 256 bc under Li's leadership and has been further developed and expanded over the past 2300 years. It lays out an ecological infrastructure on the Chengdu Plain (成 都平原) that grants the 6,687 km 2 region (roughly the size of the state of Delaware in the USA) a permanent immunity against natural liabilities of deluge and drought and offers tens of millions of people across generations the benefits of agricultural irrigation, municipal water supply, navigation, aquatic production, ecological conservation and tourism (Cao et al. 2010, p.5; Li et al. 2006, p.291; Needham et al. 1971, p.288; Peng 2008, p.542) . Its sustained success has been attributed largely to the ecophronetic, holistic, adaptive principles Li Bing improvised contextually at the onset (Peng 2008, p.540; Xiang 2014, p.67; 2016, p.58 ) which guided every step of the project life cycle, from planning, design and construction of the system, to its operation, maintenance and governance (Cao et al. 2010, p.5; Peng 2008, pp. 539-542, p.544; Zhang et al. 2013, p.539 ). Li Bing's work exemplifies a two-pronged approach to socio-ecological practice research under which a research project originates from practice and proceeds solely for practice. Unlike the scholar-practitioner Ian McHarg who strives to advance both practice and general understanding, the practitioner Li Bing aims exclusively to find the right way to do the right thing for a particular instance of socio-ecological practice and leaves no record of his research on the undergirding principles. It is only two millennia later when these scientific and managerial principles were extrapolated from the design characteristics of the irrigation system [Xiang 2019c, p.363 ; for reviews of these principles, see Cao et al. (2010) , Li et al. (2006) ]. One telling example is provided later in subsection 6.2.2 of this article.

The seven approaches to research included in the RWC-Schön-Stokes model represent different yet complementary ways of methodical knowing in socio-ecological practice and socio-ecological practice research. Their systematic arrangement in the fourfold table (see Fig. 4 ) provides an examination and comparison framework for people to seek insights that would otherwise be inconspicuous. Presented below are five insights about similarities, differences and connections among these approaches that I gained via the framework (Xiang 2020a).

The two approaches in the Pasteur-McHarg's quadrant (see Fig. 4 (Lin 2020a (Lin & 2020b . The special issue features articles by American Leopold scholar Curt Meine (2020) and sociologist Paul Van Auken (2020) and includes a selected bibliography for socio-ecological practice researchers (Lin 2020c) . 14 In compliance with the official Chinese language conventionfamily name + given name, the Pinyin translation of 李冰 is Li Bing instead of Bing Li.

three-pronged way of methodical knowing is quintessential ecopracticology-the study of socio-ecological practice (Xiang 2019a, p.10 ) and the two approaches best instantiate it. There are two main differences between the two approaches.

Despite both approaches originate research activities from practice, they view practice from different vantage points and take on different aspects of practice as their object of inquiry.

The Pasteur approach is a basic research approach developed and used by scientist researchers. Under this approach, researchers take on a practical problem practitioners encounter in their practice (e.g., preservation of beer and wine, reduction of airport's noise impacts, world hunger, climate change adaptation and mitigation, human sustainability), examine it through a scientific, often disciplinary lens and develop scientific research questions about one or several key aspects of the practical problem. These selected aspects of the real-world problem then become their object of inquiry. Their research findings are expected to and often do, contribute to the solution of the practical problem and meanwhile advance general understanding of the scientific mechanisms underlying the problem and justifying the solution.

The McHarg approach is a practice research approach developed and used by non-scientist researchers and/or applied scientist researchers. Under this approach, researchers take as the object of inquiry a concrete situation of practice real-world practitioners are engaged in [e.g., phased allocation of COVID-19 vaccines (Dooling 2020) , planning a greenway, designing an urban park, attending to NIMBY (not in my back yard) issues associated with public facility allocation]. In each concrete situation, they perceive and accept the world as an irreducible whole which mandates a full consideration of wickedness and requires a holistic and pragmatic way of thinking and acting (Xiang 2020b, pp.122-123) . They develop research questions from the totality of the situation and search for answers about what to do and how to act effectively and ethically in the concrete situation to achieve intended consequences that practitioners care about (Ibid.).

The theories researchers aim to develop under the two approaches are by nature different from each other.

Under the Pasteur approach, scientist researchers pursue theories of science for general understanding about the scientific mechanisms underlying the practical problem and justifying its solution. These theories aim to comprise "pure, objective and rational" knowledge (Cook & Spray 2012, p. 93 ) and strive to meet the requirements for generality, parsimony, consilience and predictiveness-the four qualities scientists look for in theories of science, according to American biologist EO Wilson (Wilson 1998, p.198) .

Under the McHarg approach, non-scientist researchers strive to develop theories of practice. These theories are by nature theories of particularity about "extremes," not theories of generality about "averages" (McKelvey 2006, pp.827-828; Xiang 2019a, p.9) . They consist of beliefs, ideas, policies, procedures and underlying rationales about what works, what doesn't, what matters ethically in each concrete situation and why (Argyris et al. 1974, pp.6-12; Bolan 1980, pp.263-264; Couclelis 1991, pp.382-383; Xiang 2019a, p.10; Xiang 2020b, pp.122-123) .

Despite their situation-specific nature, theories of practice such developed, when worked well in concrete situations, are study-worthy to those academic theoreticians who are interested in developing general theories of practiceacademics' theories of practice (Xiang 2020b, p.123) . As demonstrated by the influential works of noted academic theoreticians, academics' theories of practice, drawing on what practitioners did in concrete situations, may prescribe how other practitioners in comparable situations should act and justify why (Innes 1995, p.183; Mao 1937, p.300; Xiang 2019a, pp.8-10; Xiang 2020d, p.109) . Academic works of this caliber include, but are not limited to, those by Ancient Greek philosopher Aristotle (Xiang 2020b, pp.121-123) , American planning scholars Judy Innes (1942 Innes ( -2020 and John Forester (Ibid., footnote 5 on page 122), Chinese ecological planning scholar-practitioner Huang Guangyu (Huang & Chen 2002) and of course those by Ian McHarg (McHarg 1969; 2007 ).

The two approaches in the Edison-Li's quadrant (see Fig. 4 ), the Edison approach to use-inspire pure applied research for practice and the Li approach to use-inspired practice research for practice, aim to achieve the sole ambition of advancing practice. Toward this end, research projects under both approaches necessarily originate from practice, proceed for practice and end in practice (See discussions in subsections 2.2 and 5.2). This two-pronged way of methodical knowing is commonplace among non-scientist researchers and/or applied scientist researchers in socio-ecological practice.

A major difference between the two approaches lies in their ways of searching for the target knowledge needed to understand and/or resolve practical problems.

Under the Edison approach, non-scientist researchers and/or applied scientist researchers act more as users of knowledge than creators of knowledge, two terms borrowed from and as defined in the knowledge brokering literature (Ward et al. 2009, p.269 ; see also discussions in subsection 5.1 of this article). To understand and/or resolve the practical problems in hand, they turn to knowledge brokers for the target knowledge needed. Sometimes, applied scientist researchers play a dual role of knowledge user and translator. This outsourcing approach is best exemplified by the way Thomas Edison conducted much of his pure applied research for invention. Writes Donald Stokes in his 1997 book (p.24; italics by the author of this article),

[W]holly uninterested in the deeper scientific implications of his discoveries, Edison gave five years to creating his utility empire, but no time at all to [understanding] the basic physical phenomena underlying his emerging technology [of marketable electric lighting]. When others persuaded him that his primitive grasp of these things would ultimately limit his engineering ventures, he, … ran up the white flag of surrender, confessed that he never had understood these matters and [instead] hired some technicians trained in Maxwellian field theory. 15 American historian of science and technology Bruce J.

Hunt provides yet another account on Edison's outsourcing approach to pure applied research (Hunt 1983, p.355 ; italics by the author of this article):

The quintessential "half-educated electrician" Edison [sic], after a long struggle against alternating current, essentially gave up work in power engineering once it was adopted. He retained mathematical physicists to answer questions on electricity. "I've come to the conclusion," he said ruefully in 1892, "that I never did know anything about it." Authority in the electrical world had passed into the hands of the scientists.

By contrast, under the Li approach, non-scientist researchers and/or applied scientist researchers act more as creators of knowledge than users of knowledge. Take Li Bing's Dujiangyan irrigation system project in 256 BC as an example. According to Chinese historian Peng Bangben, before and during the project, Li Bing and his fellow non-scientist researchers performed systematic watershed surveys of the Minjiang River (岷江), the river from which the irrigation system would divert water to the Chengdu Plain; and conducted many in situ "on spot investigation[s]" (Peng 2008, p.544) . Through these research activities, collectively they generated a body of "rich extensive knowledge" about many socio-ecological phenomena and natural and social processes in the region (Ibid., p.547). Drawing on these understandings, they made plans, crafted designs and developed implementation procedures for every step of the project life cycle, from planning, design and construction of the system, to its operation, maintenance and governance (Ibid., . As the project proceeded and more knowledge and experience became available, they kept perfecting plans, designs and implementation procedures. Through this integrated, seamless "know-do" nexus, 16 they built a practicegrounded, time-tested body of "local knowledge with universal significance" which manifests in and contributes to the very success and stunning longevity of the irrigation system (Ibid., p.533 & p.544). As such, Li Bing and his fellow nonscientist researchers are indeed creators of knowledge and serving as a characteristic example of those non-scientist researchers who develop novel knowledge mainly if not entirely from practice and solely for practice. 17 It is noteworthy that the contextual knowledge such developed, when proved to be true and useful by the instance of practice it is created for, is necessarily scientific. For example, "harnessing shoals deep, building dams low" (深 淘滩, 低作堰) is a 6-character protocol Li Bing developed 2300 years ago for the critical annual maintenance (岁修) of the irrigation system's headworks and has been followed strictly by the local people ever since (Peng 2008, p.544) . Underlying this ancient phrase in plain Chinese language there turns out to be a "profound [modern] scientific law" that Li Bing evidently "fully understood and used" far before it was formally codified by modern-day scientists (Li et al. 2006, p.294; Peng 2008, p.544) . This same hydraulic principle of "water cross-circulation at curved river reaches" is also found in the engineering design of Feishayan (飞沙 堰), a "very effective" spillway for flushing sediment at the headworks of the irrigation system (Li et al. 2006, p.294; Zhang et al. 2013, p.545 ).

In Fig. 4 , an imaginative diagonal line from the upper left corner to the lower right corner will cross four approaches. In a top-down sequence, these are the Bohr approach to curiosity-inspired pure basic research for understanding; the Fuller approach to curiosity-inspired knowledge brokering research; the Edison approach to use-inspired pure applied research for practice; and the Li approach to use-inspired practice research for practice. They form a perfect quartet of knowledge creator, knowledge broker and knowledge user, exhibiting the enduring influence of the Bush linear model (see Fig. 1 ). The conceptual evolution of ecological resilience is a case in point.

In a 1973 seminal article "Resilience and stability of ecological systems," Canadian ecologist Crawford Holling uses the term resilience to describe a property of natural ecosystems he observed through curiosity-inspired pure basic research with the Bohr approach. He defines the resilience of ecological systems [that is, ecological resilience in the subsequent literature, see Gunderson (2000) ] as "a measure of … their [i.e., ecosystems'] ability to absorb change and disturbance and still maintain the same relationships between populations or state variables." (Holling 1973, p.14) Since then, a wealth of new knowledge has been generated about the art and science of ecological resilience (for reviews, see Biggs et al. 2015; Gunderson 2000; Wu and Wu 2013) and about the practice of building ecological resilience in human-dominated ecosystems-urban areas (For recent reviews, see Beller et al. 2018; Meerow et al. 2016; Romero-Lankao et al. 2016) . Some of these reported works in urban resilience building are results of curiosity-inspired knowledge brokering research with the Fuller approach and best exemplified by the seven principles for building resilience in socio-ecological systems proposed by South African scholar Reinette Biggs and two fellow scholars in 2015 (Biggs et al. 2015) . Other works are results of either use-inspired pure applied research with the Edison approach or use-inspired practice research with the Li approach and exemplified by the projects showcased in a 2014 book by American research psychologist Judith Rodin entitled "The resilience dividend: being strong in a world where things go wrong" (Rodin 2014 ).

Out of the four use-inspired research approaches in the RWC-Schön-Stokes model (Fig. 4) , the practice-grounded McHarg and Li approaches are wickedness-savvy, in that they are capable of "working with" wicked problems prudently through an "AAA" strategy-awareness, acceptance and adaptation (Xiang 2013, p.3) . Their more science-and/or technology-focused counterparts, the Pasteur approach and the Edison approach, are much less if ever involved in wicked problems directly and thus mostly wickedness-blind. Equally if not more wickedness-blind are the two approaches in the Bohr-Fuller's quadrant. For the Bohr approach to pure basic research, attending to wickedness is completely out of the question. The Fuller approach to knowledge brokering research, even when aspiring to, is incapable of working with wicked problems properly. This is because, as many point out, it tends to treat socio-ecological practice as an experiment field or demonstration site of scientific principles and/or technological advancement, instead of a dignified object of inquiry with its own integrity (Buchanan 1992, p.19; Innes 1995, pp. 183-184; Xiang 2017 Xiang , pp. 2243 Xiang -2244 . To make findings from pure basic research relevant to and/or workable in "the uncertain, subjective and biased [real-world] contexts of human understanding, social factors and governance" (Cook et al. 2012, p. 93) , researchers under this approach almost always have to adopt "procrustean strategies" (Schön 1987 (Schön /2001 ) so that the wicked problems can be cut-to-fit available theories and techniques (Churchman 1967, p. B-142; Schön 1987 Schön /2001 Xiang 2017 Xiang , p. 2243 . They often formulate and use imaginative practitioners who are in speculative needs for a certain target knowledge within an artificialized rational context (Churchman 1967, pp. B-141-B142; Schön 1987 Schön /2001 Xiang 2017 Xiang , p. 2244 .

What about the Johnson approach-is it wickedness savvy or blind? Given the free roam, precursor nature of the approach, suffice it to say that the answer really depends upon the direction (which quadrant, that is) researchers head to under this rambling but often necessary and sometimes productive approach.

In his 1997 book, Donald Stokes demonstrates with credible evidence that the Pasteur approach to use-inspired basic research is as effective in knowledge creation for general understanding as the Bohr approach to curiosity-inspired pure basic research. Below I use an example from a 2019 article of mine (Xiang 2019d, p.166) to show that the McHarg approach to use-inspired practice research is also as effective as the Bohr approach in creating new knowledge that advances general understanding.

Around the same time Crawford Holling publicized his conception of ecological resilience in 1973 (see discussions in 6.3), Ian McHarg came up with a novel and "profoundly simple concept" of building ecological resilience for the planning and development of The Woodlands new town, Texas, USA (McHarg 1996, p. 260) The concept is pure and simple-"to determine densities and land use from the geohydrological properties of the soils"(Ibid.). Using this concept, he and fellow non-scientist researchers developed a comprehensive ecological (instead of engineering) plan for urban-flooding-repellent development and implemented it efficaciously to guide the new town's development (Lyle 1999, p. 103, p. 237; McHarg 1996, pp. 259-264; Xiang 2016, pp. 56-57; 2019d, pp.166-167; Yang 2019, pp. 69-75; Yang and Li 2019, pp. 24-29) .

Since it was first built in the 1970s, the town has been enjoying what Judith Rodin calls "the resilience dividend" (Rodin 2014) against urban flooding that McHarg and his colleagues promised in their ecological plan yet without using the term ecological resilience (Xiang 2019d, p.167 (Yang 2019, pp.213-214) As there is no evidence found in the literature that Holling and McHarg had any intellectual contact directly or indirectly (Xiang 2019d, p.167) , does this coincidence of human achievements suggest that Holling and McHarg be "epistemically privileged" (Kidd, 2015, p.345 ) equally in discovering truth, one as a scholar-scientist and the other a non-scientist researcher (Xiang 2019d, p.167) ? Does this also suggest that their distinct approaches to research be methodologically advanced equally?

Yes, indeed (Ibid.). 7 A model whose results inspire more lines of inquiry "All models are wrong," wrote British statistician George Edward Pelham Box (1919 Box ( -2013 in 1976, but some models "can often derive results which match, to a useful approximation, those found in the real world." (Box 1976, p.792) If and when this is the case, models are heuristically useful (Ibid.; Sterman 2002, p.521) . The RWC-Schön-Stokes model may well be qualified to be such a model.

The results it derives speak for themselves. The seven approaches the model codified and presented "match those found in the real world"-they represent, "to a useful approximation," ways of methodical knowing and acting that real-world researchers developed and used in socioecological practice and socio-ecological practice research. Their systematic arrangement in the fourfold table (Fig. 4) is testimony to how non-competitive and even complementary these vastly different yet equally legitimate approaches are "found in the real world"-each of them works effectively in its own niche to serve certain unduplicated research needs.

Furthermore, these cogent results are heuristically evocative. They prompt general queries about (1) how researchers may understand and embrace multiple ways of methodical knowing that are reflective of our contemporary world (Patel et al. 2019, p.270) and (2) how researchers may take full advantage of the entirety of these approaches in socioecological practice and socio-ecological practice research. From these arise questions concerning, inter alia, researchers' entitlement and responsibility to awareness, choice and use of the seven approaches. More specifically, 1. The right to know Should researchers, be they scientists or non-scientists, be morally and professionally entitled to know that there are seven (and potentially more) different, non-competitive and even complementary approaches to research available in socio-ecological practice and socio-ecological practice research? 2. The privilege to choose and use Should researchers be morally, professionally and legally entitled to choose and use one or any combination of the seven alternative approaches that best fits the concrete research situation they find themselves in? 3. The ability to choose and use Should researchers be morally, intellectually and professionally capable of choosing and using one or any combination of the seven approaches that best fits the concrete research situation they find themselves in? 4. The responsibility to awareness, choice and use Should it be researchers' professional and social responsibility to know about and exercise their right and privilege above-mentioned and to be able to make right choice and use the selected approach effectively in their research projects?

To some of us, these questions seem oddly reminiscent of a familiar phrase on our college or professional school diplomas-"… with all the rights, privileges and dignities appertaining to that degree." Nonetheless, the questions, in their very own right, could likely lead to serious, fine-grained inquiries into an important strategy in socio-ecological practice and socio-ecological practice research-upholding methodological pluralism (Xiang 2019a, p.10) . Similarly, they could also inspire explorations of what could be called "researcher's bill of rights" in the study of socio-ecological practice. 18 These and other possible emerging lines of inquiry are worth our while to pursue, I trust.

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Acknowledgements I thank the following individuals who made comments and suggestions on the Schön-Stokes model, while I was giving presentations in the past several years: Jianguo Wu (Arizona State University, USA), CY Jim (The Education University of Hong Kong, China), Xinhao Wang (University of Cincinnati, USA), Yan Wentao, Wang Yuncai and Chen Chundi (all with Tongji University, China), Wang Hui (Nanjing Forestry University, China), and Courtney Flint (Utah State University, USA). I am indebted to Brent Heard at the National Academies of Sciences, Engineering and Medicine in Washington, DC, for inviting me to give a presentation at the workshop on November 20, 2020. The present article crystalizes many ideas emerged during the preparation for the presentation and benefits from presentations of two other panelists at the workshop, Dustin Schroeder (Stanford University, USA) and Danielle Wood (Massachusetts Institute of Technology, USA). I am grateful to two longtime colleagues who, on the condition of anonymity, provided critical yet constructive comments on an early version of this article.

Wei-Ning Xiang is a Professor of Geography and Earth Sciences at the University of North Carolina at Charlotte, USA (1990-present); the former co-editor-inchief of Landscape and Urban Planning (2011-2018) , he is the founding editor-in-chief of Socio-Ecological Practice R e s e a r c h ( S E P R ) (2019-present).