The need to establish a research field within psychology didactics at secondary level has recently been voiced by several researchers internationally. An analysis of a Swedish case coming out of secondary level education in psychology presented here provides an illustration that complexity thinking – derived from complexity theory – is uniquely placed to consider and indicate possible solutions to challenges, described by researchers as central to the foundation of a new field. Subject-matter didactics is defined for the (...) purpose of this paper as a combination of general didactics and subject- matter content, and considering the international nature of research traditions coming out of psychology, the implications of the results presented here cannot be regarded as limited solely to national concerns. An on-line survey was sent to secondary schools in Sweden. Discussions and lectures along with teaching to the book – alternatively used as inspiration – emerged as central from the thematic analysis of the results, providing the first mapping of teaching practices in secondary level psychology in Sweden. An analysis, founded on complexity thinking – combined with a model enabling a delimitation of the scope of study – focused on time use and the importance placed on self-knowledge, along with the transformation of theory into practice. The former pointing to a teacher centred nested subsystem (e.g. asymmetric relations between teachers and students), the latter pointing to student centred nested subsystems coming out of embodied knowledge (e.g. students as node) where psychological perspectives are learnt through self-reflexion, case studies and everyday life experiences (turning theory to practice), implying a holistic approach. The analysis applied to the Swedish case provides an illustration of how complexity theory has the potential to address challenges at micro and macro level to the establishment of a new research field in psychology didactics and to indicate possible solutions. Psychologies high relevance to everyday life, multi-causality, perspective pluralism, dynamic systems character and scientific character, makes complexity thinking a relevant approach in the consideration of challenges to the establishment of a research field in didactics of psychology. (shrink)

After a number of general considerations, without meaning in any sense a reductionist approach, this paper argues in favour of the mathematics of discrete systems and of the non-classical logics, and claims that a complex thinking both entails and crosses through those domains. Such a proposal, it is argued, has not been a general concern until to-date among the communities of complexologists. At the end, several consequences are withdrawn at understanding what truly thinking about complexity is all (...) about. Luego de varias consideraciones de orden general, y sin que se asuma en absoluto una postura reduccionista, este texto argumenta a favor de la tesis según la cual pensar la complejidad con la ciencia de punta implica considerar los modos y grados como las matemáticas de sistemas discretos y las lógicas no-clásicas contribuyen a la dilucidación de lo que es un pensar la complejidad. Estas consideraciones no han sido incorporadas en general por parte de la comunidad de complejólogos. Al final se extraen algunas de las consecuencias de lo que, consiguientemente, sea pensar la complejidad. (shrink)

Responding to Kunneman’s argument that the notion of ‘ethical complexity’ introduces an existential and ethical turn in the field of complexity thinking, it is argued that Kunneman’s concept of ‘diapoiesis’ corresponds to a critical interpretation of ‘complexity thinking’. By applying critical complexity thinking to the notion of voluntary work, Kunneman explores the possibility of rearticulating the notion of voluntary work outside the boundaries of the static economic paradigm of consumption and production of labor. (...) He redefines voluntary work in terms of the many tensions that emerge as a result of belonging to a number of spheres simultaneously. Reconfigured by what can be called a ‘dialogical hermeneutics of complexity thinking’ Kunneman exposes the moral narrative that underpins the ethical imperative that is inextricably linked to ‘civic meaningfulness’. (shrink)

Morin (1921) founded the complex mode of thinking in order to remedy the defects of the Western classic simple mode of thinking. In doing so, he approached to some degree the mode of thinking inherent to the Eastern civilization. This article elucidates that for some principles of Morin's complex thinking, such as correlation of opposites, recursive causality, and union of unity of multiplicity, there were similar ideas in Chinese classic philosophy. This shows that the complex paradigm (...) of thinking, in a certain point of view, will be the fusion of Western and Eastern cultural factors. Besides, in integrating his theory of complexity with the reality of our time to find out solutions to the issues of globalization, Morin has become one of the representative thinkers of the planetary age of humankind. (shrink)

Richard Dawkins has popularized an argument that he thinks sound for showing that there is almost certainly no God. It rests on the assumptions (1) that complex and statistically improbable things are more difficult to explain than those that are not and (2) that an explanatory mechanism must show how this complexity can be built up from simpler means. But what justifies claims about the designer’s own complexity? One comes to a different understanding of order and of simplicity (...) when one considers the psychological counterpart of information. In assessing his treatment of biological organisms as either self-programmed machines or algorithms, I show how self-generated organized complexity does not fit well with our knowledge of abduction and of information theory as applied to genetics. I also review some philosophical proposals for explaining how the complexity of the world could be externally controlled if one wanted to uphold a traditional understanding of divine simplicity. (shrink)

Main principles of the complex nonlinear thinking which are based on the notions of the modern theory of evolution and self-organization of complex systems called also synergetics are under discussion in this article. The principles are transdisciplinary, holistic, and oriented to a human being. The notions of system complexity, nonlinearity of evolution, creative chaos, space-time definiteness of structure-attractors of evolution, resonant influences, nonlinear and soft management are here of great importance. In this connection, a prominent contribution made to (...) system analysis and to a necessary reform of education and thinking by Edgar Morin is considered. (shrink)

The theory of nonlinear complex systems has become a successful and widely used problem-solving approach in the natural sciences - from laser physics, quantum chaos and meteorology to molecular modeling in chemistry and computer simulations of cell growth in biology. In recent times it has been recognized that many of the social, ecological and political problems of mankind are also of a global, complex and nonlinear nature. And one of the most exciting topics of present scientific and public interest is (...) the idea that even the human mind is governed largely by the nonlinear dynamics of complex systems. In this wide-ranging but concise treatment Prof. Mainzer discusses, in nontechnical language, the common framework behind these endeavours. Special emphasis is given to the evolution of new structures in natural and cultural systems and it is seen clearly how the new integrative approach of complexity theory can give new insights that were not available using traditional reductionistic methods. (shrink)

Even beginners and young graduate students will have something to learn from this book." (Andre Hautot, Physicalia, Vol. 57 (3), 2005)"All-in-all, this highly ...

Until recently, cognitive science focused on such mental functions as problem solving, grammar, and pattern-the functions in which the human mind most closely resembles a computer. But humans are more than computers: we invent new meanings, imagine wildly, and even have ideas that have never existed before. Today the cutting edge of cognitive science addresses precisely these mysterious, creative aspects of the mind.The Way We Think is a landmark analysis of the imaginative nature of the mind. Conceptual blending is already (...) widely known in research laboratories throughout the world; this book, written to be accessible to both lay readers and interested scientists, is its definitive statement. Gilles Fauconnier and Mark Turner show that conceptual blending is the root of the cognitively modern human mind, and that conceptual blends themselves are continually combined and reblended to create the rich mental fabric in which we live.The Way We Think shows how this blending operates; how it is affected by (and gives rise to) language, identity, culture, and invention; and how we imagine what could be and what might have been. The result is a bold and exciting new view of how the mind works. (shrink)

In this paper we continue an ongoing dialogue that has as its goal the critical appraisal of theoretical perspectives on culture and health, in an effort to move forward scholarship on culture and health. We draw upon a programme of scholarship to explicate theoretical tensions and challenges that are manifest in the discourses on culture and health and to explore the possibilities Bourdieu's theoretical perspective offers for reconciling them. That is, we hope to demonstrate the need to move beyond descriptions (...) ‘of’ culture to an understanding of cultures as dynamic, and to show ways cultural practices create contexts that have the potential to foster or impede health.In our early research, largely undertaken in Canada's multicultural context, we sought to make visible the ways in which culture shaped conceptions of health and influenced health practices of immigrant groups. In recent years this focus has expanded to include populations that reflect the cultural and social diversity of our region. From the outset we attempted to move towards a conception of culture as negotiated, unifying, transformative and dynamic. While this position continues to hold appeal we are continually reminded that, despite our leanings towards constructivism, there is salience to the notion of culture as having enduring elements. It is this tension between the view of culture as embodied and enduring and culture as constructed and dynamic that we seek to examine.We explore whether Bourdieu's theoretical perspective offers promise for reconciling these apparently competing views. Using exemplars from our research we share insights that Bourdieu's work has offered to our analyses, thereby enabling us to move towards a view of culture that holds in tension these apparently contradictory positions of culture as both essence (albeit unstable, negotiated) and constructed. (shrink)

It is usually assumed in debates about systems thinking, complexity and the philosophy of science that science is primarily about observation. However, the starting point for this paper is intervention, defined as purposeful action by an agent to create change. While some authors suggest that intervention and observation are opposites, it is argued here that observation should be viewed as just one type of intervention. We should therefore welcome scientific techniques of observation into a pluralistic set of intervention (...) methods, alongside methods for exploring values, reflecting on subjective understandings, planning future activities, etc. However, there is a need to explicitly counter a possible pernicious interpretation of this argument: intervention could be viewed as flawlessly pre-planned change based on accurate predictions of the consequences of action. This is the mechanistic world-view that systems thinking and complexity science seek to challenge. Therefore, having redefined scientific observation as intervention, the paper revisits insights from systems thinking and complexity to propose a methodology of systemic intervention. Some brief reflections are then provided on the wider social implications of this methodology. (shrink)

What do a short car trip, a pandemic, the wood-wide fungal web, a challenging learning experience, a storm, transport logistics, and the language(s) we speak have in common? All of them are systems, or multiple sets of systems within systems. What happens in any set of circumstances will depend on a mix of initial conditions, complexity dynamics, and the odd wild card (e.g., a chance event). While it is possible to model and predict what might or perhaps should happen, (...) it is impossible to be certain. "It depends" thinking needs to be applied. Future-focused literature identifies complex systems thinking as an essential capability for citizenship, and this book sets out to show teachers how they might foster it-for themselves as well as for their students. There are implications for pedagogy, curriculum, and assessment. Multiple examples show what changes might look like, for students of different ages, and in different subject contexts. This is a book of several layers: It is both practical and philosophical. There is explicit discussion of parallels between complexity science and indigenous knowledge systems (specifically mātauranga Māori in the New Zealand context). The many examples are designed to appeal to general readers with an interest in the complex challenges facing contemporary societies, as well as to teachers at all levels of the education system. (shrink)

We investigated the contributions of familiarity of setting, self-relevance and self-projection in time to episodic future thinking. The role of familiarity of setting was assessed, in Experiment 1, by comparing episodic future thoughts to autobiographical future events supposed to occur in unfamiliar settings. The role of self-relevance was assessed, in Experiment 2, by comparing episodic future thoughts to future events involving familiar others. The role of self-projection in time was assessed, in both Experiments, by comparing episodic future thoughts to (...) autobiographical events that were not temporal in nature. Results indicated that episodic future thoughts were more clearly represented than autobiographical future events occurring in unfamiliar setting and future events involving familiar others. Our results also revealed that episodic future thoughts were indistinguishable from autobiographical atemporal events with respect to both subjective and objective detail ratings. These results suggest that future and atemporal events are mentally represented in a similar way. (shrink)

In this chapter we want to provide philosophical tools for understanding and reasoning about complex systems. Classical thinking, which is taught at most schools and universities, has several problems for coping with complexity. We review classical thinking and its drawbacks when dealing with complexity, for then presenting ways of thinking which allow the better understanding of complex systems. Examples illustrate the ideas presented. This chapter does not deal with specific tools and techniques for managing complex (...) systems, but we try to bring forth ideas that facilitate the thinking and speaking about complex systems. (shrink)

An outstanding question for Hybrid dual process models of reasoning is whether both basic and more complex forms of conditional inference result...

‘Complexics’ denotes the meta-transdisciplinary field specifically concerned with giving us suitable cognitive tools to understand the world’s complexity. Additionally, the use of the adjective ‘complexical’ would avoid the common confusion caused by the adjective ‘complex’, which belongs to everyday usage and already has its own connotations of complication and confusion. Thus, ‘complexical’ thinking and ‘complexical’ perspective would provide clearer terms, be freer of confusion, and refer more precisely to epistemic elements in contrast to the ‘complexity’ typical of (...) many phenomena of reality. In short, the world would be ‘complex’, but our way of looking at the world would be ‘complexical’. As a meta-transdiscipline, ‘complexics’ would carry on the perspective of cybernetics: “Cybernetics deals with all forms of behaviour insofar as they are regular, or determinate, or reproducible. The materiality is irrelevant… The truths of cybernetics are not conditional on their being derived from some other branch of science. Cybernetics has its own foundations” (Ashby, 1956:1). Thus, it has a distinctly transdisciplinary mission to provide concepts, schema and possibilities of thinking and representation able to express the multidimensional and systemic interwovenness and interdependence of the many, highly significant phenomena of reality that have these characteristics. On the level of theory, complexics needs to provide a set of principles, concepts and conceptual landscapes that can be applied transversally to distinct areas of knowledge and phenomena of reality, enabling us to gain a much firmer grasp of the complex aspects of their existence than we currently have. For this reason, our aim needs to be, as Morin says, not “to reduce complexity to simplicity, [but] to translate complexity into theory” (1994:315). (shrink)

In this essay Ken McGrew critically examines the school-to-prison pipeline metaphor and associated literature. The origins and influence of the metaphor are compared with the origins and influence of the competing prison industrial complex concept. Specific weaknesses in the pipeline literature are examined. These problems are described as resulting, in part, from the influence that the pipeline metaphor has on the thinking of those who follow it. McGrew argues that addressing the weaknesses in the literature, abandoning the metaphor, and (...) adopting a more complex theoretical orientation grounded in critical scholarship, will enable educational scholars to better capture the relational nature of the social phenomena being described while simultaneously making their work more useful to emerging movements for social justice. (shrink)

Cet essai s’emploie à opérationnaliser les principes de la pensée complexe d’Edgar Morin, en prenant comme prétexte la question de gouvernance. Il porte sur la gouvernance régie par les principes du paradigme de simplicité et indique une autre façon de penser la gouvernance à la lumière des leçons de la pensée complexe, notamment au Congo. Il apparaît que gouverner en situation complexe, c’est chercher des solutions, en délibérant, au fur et à mesure que le vieil équilibre normatif se lézarde ; (...) c’est reconnaître les conflits, les oppositions, les incertitudes, la complexité de la et en société, et travailler avec eux.This essay seeks to operationalize the principles of complex thinking Edgar Morin, using as a pretext the issue of governance. It focuses on governance guided by the principles of simplicity and paradigm indicates another way of thinking about governance in the light of the lessons of complex thought, especially in Congo. It appears that govern complex situation is to seek solutions, deliberating as and as the old equilibrium normative crack, is to recognize conflicts, oppositions, uncertainty, complexity and society, and work with them. (shrink)

ABSTRACTThe increasing recognition of the negative impact of income inequality has highlighted the importance of taxation which can function as a redistributive mechanism. Previous critical social psychological research found that talk about restricting the welfare state, that is funded through tax, is formed of ideology that supports the maintenance of income inequality. Therefore, this research explores how speakers use talk about tax to justify income inequality during a UK BBC radio discussion, ‘Moral Maze: The moral purpose of tax’ which involved (...) public figures discussing the role of tax. This programme was analysed from a critical discursive psychological perspective. It was found that two contrasting constructions of tax were presented: tax as a collective responsibility or tax as an individual burden, whereby speakers drew on social justice and individualistic ideology respectively. Arguments for high tax rates are problematic due to the acceptability of inequality in a meritocracy. By presenting wealthy individuals as more deserving than the less affluent, arguments for higher tax come to be challenged. (shrink)

Alfred North Whitehead has never gone out of print, but for a time he was decidedly out of fashion in the English-speaking world. In a splendid work that serves as both introduction and erudite commentary, Isabelle Stengersâe"one of todayâe(tm)s leading philosophers of scienceâe"goes straight to the beating heart of Whiteheadâe(tm)s thought. The product of thirty yearsâe(tm) engagement with the mathematician-philosopherâe(tm)s entire canon, this volume establishes Whitehead as a daring thinker on par with Gilles Deleuze, Felix Guattari, and Michel Foucault. Reading (...) the texts in broadly chronological order while highlighting major works, Stengers deftly unpacks Whiteheadâe(tm)s often complicated language, explaining the seismic shifts in his thinking and showing how he called into question all that philosophers had considered settled after Descartes and Kant. She demonstrates that the implications of Whiteheadâe(tm)s philosophical theories and specialized knowledge of the various sciences come yoked with his innovative, revisionist take on God. Whiteheadâe(tm)s God exists within a specific epistemological realm created by a radically complex and often highly mathematical language. âeoeTo think with Whitehead today,âe Stengers writes, âeoemeans to sign on in advance to an adventure that will leave none of the terms we normally use as they were.âe. (shrink)

Throughout most of the 20th century, analytical and reductionist approaches have dominated in biological, social, and humanistic sciences, including linguistics and communication. We generally believed we could account for fundamental phenomena in invoking basic elemental units. Although the amount of knowledge generated was certainly impressive, we have also seen limitations of this approach. Discovering the sound formants of human languages, for example, has allowed us to know vital aspects of the ‘material’ plane of verbal codes, but it tells us little (...) about significant aspects of their social functions. I firmly believe, therefore, that alongside a linguistics that looks ‘inward’ there should also be a linguistics that looks ‘outward’, or one even that is constructed ‘from the outside’, a linguistics that I refer to elsewhere as ‘holistic’ though it could be identified by a different name. My current vision is to promote simultaneously the perspective that goes from the part to the whole and that which goes from the whole to the parts, i.e., both from the top down and from the bottom up. This goal is shared with other disciplines which recognize that many phenomena related to life are interwoven, self-organising, emergent and processual. Thus, we need to re-examine how we have conceived of reality, both the way we have looked at it and the images we have used to talk about it. Several approaches now grouped under the label of complexity have been elaborated towards this objective of finding new concepts and ways of thinking that better fit the complex organisation of facts and events. (shrink)

Complex problem solving (CPS) emerged in the last 30 years in Europe as a new part of the psychology of thinking and problem solving. This paper introduces into the field and provides a personal view. Also, related concepts like macrocognition or operative intelligence will be explained in this context. Two examples for the assessment of CPS, Tailorshop and MicroDYN, are presented to illustrate the concept by means of their measurement devices. Also, the relation of complex cognition and emotion in (...) the CPS context is discussed. The question if CPS requires complex cognition is answered with a tentative “yes.”. (shrink)

The acknowledgement that something is complex, it is argued, implies that our knowledge of it will always be limited. We cannot make complete, absolute or final claims about complex systems. Post-structuralism, and specifically deconstruction, make similar claims about knowledge in general. Arguments against deconstruction can, therefore, also be held against a critical form of complexity thinking and a defence of the view from complexity (as presented here) should take account of them. Three of these arguments are investigated: (...) that deconstruction and complexity-thinking lead to relativism, that they are subject to the performative contradiction and that their claims are vague. It is shown that these critiques are not really effective and it is suggested that a responsible approach to complexity has to be provisional, i.e. modest, without being vague or relativistic. (shrink)

Here, for the first time, development studies encounters the set of ideas popularly known as 'Chaos Theory'. Samir Rihani applies to the processes of economic development, ideas from complex adaptive systems like uncertainty, complexity, and unpredictability. Rihani examines various aspects of the development process - including the World Bank, debt, and the struggle against poverty - and demonstrates the limitations of fundamentally linear thinking in an essentially non-linear world.

"Intelligence" has long been considered to be a feature unique to human beings, giving us the capacity to imagine, to think, to deceive, to make complex connections between cause and effect, to devise elaborate stategies for solving problems. However, like all our other features, intelligence is a product of evolutionary change. Until recently, it was difficult to obtain evidence of this process from the frail testimony of a few bones and stone tools. It has become clear in the last 15 (...) years that the origins of human intelligence can be investigated by the comparative study of primates, our closest non-human relatives, giving strong impetus to the case for an "evolutionary psychology", the scientific study of the mind. (shrink)

Michael Davis, a leading figure in the study of professional ethics, offers here both a compelling exploration of engineering ethics and a philosophical analysis of engineering as a profession. After putting engineering in historical perspective, Davis turns to the Challenger space shuttle disaster to consider the complex relationship between engineering ideals and contemporary engineering practice. Here, Davis examines how social organization and technical requirements define how engineers should (and presumably do) think. Later chapters test his analysis of engineering judgement and (...) autonomy empirically, engaging a range of social science research including a study of how engineers and managers work together in ten different companies. (shrink)

This article is about the power of critical thinking through embryos and embryology in bioart. In this instance, critical thinking does not promise revolution or a takedown of bioengineering, but basic empowerment through scientific knowledge. I argue that the use of embryos in Jill Scott’s Somabook (2011) and Adam Zaretsky’s DIY Embryology (2015) constitutes an instance of what Philip Galanter identifies as complexism. In turn, the complexism of embryology reveals two modes of critical thinking. First, embryology distils (...) the awe and wonder that come with basic scientific literacy. In turn, scientific literacy provides agency for individuals through a trifecta of feeling, belief and pragmatism: based on the frisson of curiosity and wonder that comes with recognizing biological complexity, it frees individuals from the bounds of superstition and metaphysics while building a path to fact-based problem solving. Second, as works of art bearing embryos they are part of the politics and history of embryology that emerged in contrast to genetics almost a century ago. Distinct from the coding of genetics as nucleus-centric, separate, homogeneous, a matter of being, and male, embryology was coded as cytoplasmic, interactive, heterogeneous, a matter of becoming, and feminist. (shrink)

When we deal with complex things, like human subjects or organizations, we deal with identity – that which makes a person or an organization what it is and distinguishes him/her/it from other persons or organizations, a kind of “self”. Our identity determines how we think about and interact with others. It will be argued in this chapter that the self is constituted relationally. Moreover, when we are in the realm of the self, we are always already in the realm of (...) engaging with and mediating differences – the realm of ethics. The position which will be developed argues that approaching identity as a complex system allows us to resist thinking of identity as an easily identifiable and static entity. Identity is always being constituted within a complex and contingent world, where we have to make choices based on contingent values rather than on universal knowledge or the outcome of rational calculations. As a result, we have to keep in mind that our daily practices always already have an ethical component, and our decisions need to be continually evaluated and re-evaluated in the light of our (and others’) varying identities. (shrink)

Is there reason to be concerned about what has been seen as an increasing trend for discourse on complex issues to be confined to an “echo chamber” of like-minded individuals? To investigat...

Contemporary theories on complex adaptive systems stem from a natural science perspective. Paul Cilliers was one of the first complexity thinkers to translate the theoretical concepts into a qualitative and normative understanding of complexity. This collected volume of essays consolidates his later work. The introduction by Preiser and Woermann reflects on the significance ofhis contribution within the broader field of complex systems thinking.

JPVA Journal of Philosophy and the Visual Arts No 6 Complexity Architecture / Art / Philosophy 'Beginning with complexity will involve working with the recognition that there has always been more than one. Here however this insistent "more than one" will be positioned beyond the scope of semantics; rather than complexity occurring within the range of meaning and taking the form of a generalised polysemy, it will be linked to the nature of the object and to its (...) production. Complexity, therefore, will be inextricably connected to the ontology of the object. What this means is that complexity, in resisting the hold of a semantic idealism on the one hand, and the attempt to give to it the position of being the basis of a new foundationalism on the other, becomes a way of thinking both the presence and the production of objects.' Andrew Benjamin The Journal of Philosophy and the Visual Arts has set new standards in its exploration of themes central to philosophy's relation to the visual arts, illuminating areas of art criticism, architecture, feminism as well as philosophy itself. Rather than simply reflecting current trends it provides a forum in which the real developments in the analysis of the visual arts and its larger cultural and political context can be presented. Articles by well known philosophers and theorists, as well as some lesser known, together with writings by artists and architects allow a strong interdisciplinary approach reflecting the Journal's roots in post-structural theory. Previous issues include: Philosophy & the Visual Arts (No 1) Philosophy & Architecture (No 2) Architecture, Space, Painting (No 3) The Body (No 4) Abstraction (No 5). (shrink)

Thinking Space is ideal reading for those looking to learn about the Ospatial turn1 in social and cultural theory. As theorists have begun using using geographical concepts and metaphors to think about the complex and differentiated world this book examines the way they use spatial ideas, what role these ideas play in their thinking and what this means for how we think about theory and space. Among the writers discussed are: Simmel, Bakhtin, Deleuze, Cixous, Lefebvre, Lacan, Bourdieu, Foucault (...) and Fanon. (shrink)

Thinking with Literature offers a succinct introduction to a cognitive literary criticsm, broad in scope but focusing on a particular cluster of approaches, some of which have so far been little used. Explanatory chapters and sections alternate with close readings of literary texts from a wide range of different periods and genres. The literary readings are not mere 'examples' of cognitive topics, still less of hypotheses in cognitive science: the central argument is that cognitive criticism must draw its primary (...) energies from the complexities of literature itself. The main objective of the book is to induce a change of perspective in the reader: to see the point, and the extreme interest, of adopting a cognitive approach to literary criticism. (shrink)

Why do people create extra representations to help them make sense of situations, diagrams, illustrations, instructions and problems? The obvious explanation— external representations save internal memory and com- putation—is only part of the story. I discuss seven ways external representations enhance cognitive power: they change the cost structure of the inferential landscape; they provide a structure that can serve as a shareable object of thought; they create persistent referents; they facilitate re- representation; they are often a more natural representation of (...) structure than mental representations; they facilitate the computation of more explicit encoding of information; they enable the construction of arbitrarily complex structure; and they lower the cost of controlling thought—they help coordinate thought. Jointly, these functions allow people to think more powerfully with external representations than without. They allow us to think the previously unthinkable. (shrink)