Max Velmans

Updated and revised, the highly-anticipated second edition of The Blackwell Companion to Consciousness offers a collection of readings that together represent the most thorough and comprehensive survey of the nature of consciousness available today. Features updates to scientific chapters reflecting the latest research in the field Includes 18 new theoretical, empirical, and methodological chapters covering integrated information theory, renewed interest in panpsychism, and more Covers a wide array of topics that include the origins and extent of consciousness, various consciousness experiences such as meditation and drug-induced states, and the neuroscience of consciousness Presents 54 peer-reviewed chapters written by leading experts in the study of consciousness, from across a variety of academic disciplines.

What is consciousness? -- Conscious souls, brains and quantum mechanics -- Are mind and matter the same thing? -- Are mind and consciousness just activities? -- Could robots be conscious? -- Conscious phenomenology and common sense -- The nature and location of experiences -- Experienced worlds, the world described by physics, and the thing itself -- Subjective, intersubjective, and objective science -- How consciousness relates to information processing in the brain -- The neural causes and correlates of consciousness -- What consciousness is -- What consciousness does -- Self-consciousness in a reflexive universe.

This chapter compares classical dualist and reductionist views of phenomenal consciousness with an alternative, reflexive way of viewing the relations amongst consciousness, brain and the external physical world. It argues that dualism splits the universe in two fundamental ways: in viewing phenomenal consciousness as having neither location nor extension it splits consciousness from the material world, and subject from object. Materialist reductionism views consciousness as a brain state or function (located and extended in the brain), which eliminates the consciousness/material world split, but retains the split of subject from object. The chapter argues that neither dualism nor reductionism accurately describes the phenomenal world; consequently, they each provide a misleading understanding of phenomenal consciousness. Reflexive monism follows the contours of everyday experience, thereby allowing a more unified understanding of how phenomenal consciousness relates to the brain and external physical world that is consistent both with the findings of science and with common sense. The chapter goes on to consider how phenomenal objects relate to real objects, perceptual projection, how phenomenal space relates to physical space, whether the brain is in the world or the world in the brain, and why this matters for science.

In this chapter I re‐examine the basic conditions required for a study of conscious experiences in the light of progress made in recent years in the field of consciousness studies. I argue that neither dualist nor reductionist assumptions about subjectivity versus objectivity and the privacy of experience versus the public nature of scientific observations allow an adequate understanding of how studies of consciousness actually proceed. The chapter examines the sense in which the experimenter is also a subject, the sense in which all experienced phenomena are private and subjective, the different senses in which a phenomenon can nevertheless be public and observations of it objective, and the conditions for intra‐subjective and intersubjective repeatability. The chapter goes on to re‐examine the empirical method and how methods used in psychology differ from those used in physics. I argue that a reflexive understanding of these relationships supports a form of “critical phenomenology” that fits consciousness studies smoothly into science.

This chapter examines the integrative nature of reflexive monism (RM), a psychological/philosophical model of a reflexive, self-observing universe that can accommodate both ordinary and extraordinary experiences in a natural, non-reductive way that avoids both the problems of reductive materialism and the (inverse) pitfalls of reductive idealism. To contextualize the ancient roots of the model, the chapter touches briefly on classical models of consciousness, mind and soul and how these differ in a fundamental way from how mind and consciousness are viewed in contemporary Western philosophy and psychological science. The chapter then travels step by step from such contemporary views towards reflexive monism, and towards the end of the chapter, to more detailed comparisons with Hindu Vedanta and Samkhya philosophy and with Cosmopsychism (a recently emergent, directly relevant area of philosophy of mind). According to RM there never was a separation between what we normally think of as the “physical world” and what we think of as our “conscious experience”. In terms of its phenomenology, the phenomenal physical world is part-of conscious experience not apart-from it. This phenomenal world can be thought of as a biologically useful representation of what the world is like, although it is not the world as-described-by modern physics, and it is not the thing itself—supporting a form of indirect (critical) realism. The analysis then outlines how 3D phenomenal worlds are constructed by the mind/brain, focusing specifically on perceptual projection, and then demonstrates how normal, first-person conscious experiences (e.g. of phenomenal worlds) and their associated, third-person viewable neural correlates can be understood as dual manifestations of an underlying psychophysical mind, which can, in turn, be understood as a psychophysical form of information processing. This dual-aspect monism combines ontological monism with a form of epistemological dualism in which first- and third-person perspectives on the nature of mind are complementary and mutually irreducible—a principle that turns out to have wide-ranging applications for the study and understanding of consciousness. The chapter then considers the evolution and wider distribution of consciousness (beyond humans) through a brief analysis of the many forms of discontinuity theory versus continuity theory and argues that to avoid the “hard problem” of consciousness one may need to treat its existence as fundamental, and, as co-evolving with the evolution of its associated material forms. This, in turn, takes one to a central issue: What does consciousness actually do? The analysis argues that its central function is to real-ize existence (to know it in a way that makes it subjectively real). With these foundations in place we then come to the heart of the essay—the ways in which reflexive monism provides a very different view of the nature of the universe to those offered either by dualism or materialist reductionism. As summarised in the last paragraph of this section, “In this vision, there is one universe (the thing-itself), with relatively differentiated parts in the form of conscious beings like ourselves, each with a unique, conscious view of the larger universe of which it is a part. In so far as we are parts of the universe that, in turn, experience the larger universe, we participate in a reflexive process whereby the universe experiences itself.” The essay then considers the precise ways in which this reflexive monist understanding of “consciousness” and “mind” relates to later developments in Vedic philosophy and suggests a way of bridging contemporary Western and classical Vedic ways of understanding consciousness and mind. Finally, the chapter considers what can be said of mystical experience and the ground of being, following the principle that this ground must have the power to both manifest the universe in the form that science shows it to be and our ability to experience the universe in the way that we do. In this, RM is shown to be a dual-aspect monist form of cosmopsychism—a recent area of development within philosophy of mind. The essay compares and contrasts this with idealist versions of cosmopsychism and argues that RM allows for an integrated understanding of realism versus idealism, dualism versus monism, how ordinary experience relates to mystical experience, and how consciousness relates to mind. RM also provides an ‘open’ conceptual system that can, in principle, incorporate a range of parapsychological effects.

n April, 2014 I organized an International Workshop on East-West Approaches to the Nature of Mind, Consciousness and Self, in the beautiful grounds of Dartington Hall, in Devon, England to explore the edges of current understanding of ordinary and extra-ordinary conscious experience. Although Consciousness Studies is now a flourishing area of investigation, ordinary and extra-ordinary human experiences do not fit comfortably into the prevailing materialist-reductionist paradigm, suggesting the need to explore non-reductionist approaches in an open, but nevertheless rigorous way. Consciousness has, of course, also been studied in the East over the millennia, but there are major cultural differences in the ways mind, consciousness and self are conceptualized and investigated in the East and in the West, making it difficult to integrate Eastern with Western ways of thought. This provided the purpose for the workshop—to gather together an invited selection of some of the best current thinkers and researchers in this cross-disciplinary area to present their work, along with a group of discussants that included equally senior, mid-career and more junior researchers from different traditions (both Eastern and Western), to explore the issues in depth, with the aim of moving closer to a more integrated, inclusive worldview. The progression of the workshop over four days broadly followed four themes: 1) how to obtain knowledge additional to that provided by the usual third-person methods of science through subjective ways of knowing and by focusing close attention on the details of ordinary experience 2) the range and significance of extraordinary experiences 3) the potentially transformative effects on the knower of engaging in such explorations, and 4) some integrative ways of thinking about what is revealed by such investigations.

: This commentary focuses on the scientific status of perceptual projection-a central feature of Pereira’s projective theory of consciousness. In his target article, he draws on my own earlier work to develop an explanatory framework for integrating first-person viewable conscious experience with the third-person viewable neural correlates and antecedent causes that form conscious experience into a bipolar structure that contains both a sense of self and a sense of the world. I stress that perceptual projection is a psychological effect and list many of the ways it has been studied within experimental psychology, for example in studies of depth perception in vision and audition and experiences of depth arising from cues arranged on two-dimensional surfaces in stereoscopic pictures, 3D cinemas, holograms, and virtual realities. I then juxtapose Pereira’s explanatory model with two other models that have similar aims and background assumptions but different orientations, Trehub’s Retinoid model, which focuses largely on the neural functioning of the visual system, and Rudrauf et al’s Projective Consciousness Model, which draws largely on projective geometries to specify the requirements of organisms that need to navigate a three-dimensional world, and how these might be implemented in human information processing. Together, these models illustrate both converging and diverging approaches to understanding the role of projective processes in human consciousness. Resumo: Este comentário enfoca o status científico da projeção perceptiva - uma característica central da teoria da consciência de Pereira. Em seu artigo alvo, ele recorre ao meu trabalho anterior para desenvolver uma estrutura explicativa para integrar a experiência consciente visível em primeira pessoa com os correlatos neurais visíveis de terceira pessoa e as causas antecedentes que formam a experiência consciente em uma estrutura bipolar que contém tanto um sentido de eu e um sentido do mundo. Enfatizo que a projeção perceptiva é um efeito psicológico e relaciono modalidades de seu estudo na psicologia experimental, por exemplo em estudos de percepção de profundidade em visão e audição, experiências de profundidade em superfícies bidimensionais em imagens estereoscópicas, cinemas 3D, hologramas e realidades virtuais. Eu então justaponho o modelo explicativo de Pereira com dois outros modelos que têm objetivos e suposições similares, mas orientações diferentes, o modelo do sistema retinóide de Trehub, que se concentra principalmente no funcionamento neural do sistema visual, e o modelo de consciência projetiva de Rudrauf et al., que estabelece raciocínios geométricos para especificar os requisitos de organismos que precisam navegar em um mundo tridimensional, e como eles podem ser implementados no processamento de informação no contexto humano. Juntos, esses modelos ilustram abordagens convergentes e divergentes para compreender o papel dos processos projetivos na consciência humana.

This is the fourth of four online Companions to Velmans, M. (ed.) (2018) Consciousness (Critical Concepts in Psychology), a 4-volume collection of Major Works on Consciousness commissioned by Routledge, London. The Companion (and Volume) begins with a review of mental influences on states of the body and brain (psychogenesis), which are often thought of as theoretically problematic for conventional materialist theories of mind. The evidence is nevertheless extensive, for example in psychosomatic illnesses and studies of the physiological consequences of meditation, imagery, biofeedback and hypnosis. Such effects are also central to developments in psychoneuroimmunology and studies of placebos, dealing not only with how to control for such effects in clinical trials, but with how such effects operate, and how to harness them for the benefit of patients. The Companion then surveys altered states of consciousness, including the conditions for their emergence, their adaptive as well as maladaptive potential, and the influences of culture on how these are understood. The analysis deepens with reviews of the major ways in which consciousness can be usefully transformed, starting with the burgeoning literature on the nature and effects of meditation practices, including their effects on neural dynamics and the varied ways in which they have, in recent years, been incorporated into a range of psychological therapies, focusing particularly on mindfulness and its potential consequences for psychological health. The survey then turns to mystical experiences, which, of all the positive altered states of consciousness, are perhaps the most extraordinary and transformative. Reported over millennia and recognized by William James to combine ineffability with a noetic quality, their generation, effects and interpretation have, once more, become the subject of research. In this connection, we also review the resurgent interest in the use of drugs in the transformation of consciousness focusing particularly on recent research on the clinical and neurophysiological effects of major psychedelics such as psilocybin and LSD. It will be apparent that the four Volumes of this Collection cover a vast range of phenomena that cannot comfortably be accommodated into a materialist, reductionist worldview, and so this Companion (and the entire collection) concludes with a diverse sample of non-reductive, integrative theories that offer unifying ways of understanding consciousness, drawing on information theory, neuropsychology, psychodynamics, physics, psychology, parapsychology, and philosophy. As with the other Companions to these Volumes there are many links to background resources (marked in pink) and to the selected readings themselves (marked in blue).

This is the third of four online Companions to Velmans, M. (ed.) (2018) Consciousness (Critical Concepts in Psychology), a 4-volume collection of Major Works on Consciousness commissioned by Routledge, London. The Companion to Volume 3 introduces major phases and findings in the search for the neural correlates of consciousness (NCC) starting with the time it takes for these to form and the wider research program that might lead to their discovery. This includes the search for mechanisms responsible for “neural binding”—how widely dispersed neural activities support integrated conscious experiences, and the search for neural markers of consciousness that can serve to distinguish conscious from preconscious and unconscious activities in the brain. We then turn to global disorders of consciousness that indirectly reveal the conditions that support consciousness by establishing what abolishes it or impairs it, and conclude this section with reviews of the major challenges in the search for NCCs that still remain. This survey then continues with research on the divided brain with cerebral commissurotomy patients, which proved to be very useful in determining the respective functions of the left and right halves of the brain. It also raised philosophical questions. Could consciousness itself be divided by this operation? And, if so, would such patients have a distinct left-brain and right-brain consciousness? Philosophical issues also combine with methodological and experimental developments in the following sections on the reintroduction of first-person methods and how to combine these with complementary, third-person methods in neurophenomenology and experiential neuroscience—two well-developed research programs for both investigating consciousness and understanding its functions. This Companion (and associated Volume) then concludes with a survey of research on free will, covering both the major findings arising from neuropsychological research and a way to understand these that is consistent with a natural understanding of volition, ethics, and legal responsibility. As with the other Companions to these Volumes there are many links to background resources (marked in pink) and to the selected readings themselves (marked in blue).

This is the second of four online Companions to Velmans, M. (ed.) (2018) Consciousness (Critical Concepts in Psychology), a 4-volume collection of Major Works on Consciousness commissioned by Routledge, London. The Companion to Volume 2 Part 1 focuses on the detailed relationship of phenomenal consciousness to mental processing described either functionally (as human information processing) or in terms of neural activity, in the ways typically explored by cognitive psychology and cognitive neuroscience. Beginning with reviews of functional differences between unconscious, preconscious and conscious processing and the different senses in which mental processing can be said to be “conscious”, the readings turn to seminal work on blindsight and related phenomena, experimental evidence of perception without awareness, ways to combine “subjective” and “objective” measures of awareness, evidence for distinct neural pathways governing visual awareness and visual control of motor acts, and the complex ways in which consciousness of action relates to both voluntary and involuntary acts. The readings then focus on the intimate links between attention and consciousness, starting with the writings of William James and surveying the extensive work on this subject over the last 60 years that explores the relationships between and attended and non-attended processing, preconscious and conscious processing, and attention, primary (working, short-term) memory and consciousness. The readings go on to survey the evidence that attention contributes to the “neural binding” required for an integrated conscious experience and evidence that attention (in humans) is dissociable from consciousness, necessary for consciousness, but not sufficient for consciousness. The readings then turn to research on “inattentional blindness”, and conclude with a review of Baars’ global workspace theory, which integrates many theories and findings in this area into a coherent, global model. The Companion then summarises seminal readings on learning, memory and consciousness; the extensive research on mental imagery, long thought to epitomize private, subjective conscious experience—and consequently ruled out of science by reductive, materialist philosophies of mind; the complex relations of consciousness to sleep and dreaming; the development of consciousness in human infants; and the debates surrounding, and extensive evidence for consciousness in non-human animals, with attendant consequences for their humane treatment. As with the other Companions to these Volumes there are many links to background resources (marked in pink) and to the selected readings themselves (marked in blue).

This is the first of four online Companions to Velmans, M. (ed.) (2018) Consciousness (Critical Concepts in Psychology), a 4-volume collection of Major Works on Consciousness commissioned by Routledge, London. Each of the Companions presents a pre-publication version of the introduction to one of the Volumes and, for Volume 1, it also sets the stage for the entire, printed collection. As the collection forms part of a Critical Concepts in Psychology series, this selection of major works focuses mainly on works that have a direct psychological relevance. From the mid 19th Century onwards, psychology began to separate itself from philosophy, and the development of psychological thought about consciousness links intimately to the development of psychology itself. In order to trace this development, the four volumes of this collection follow a rough, historical sequence. Volume 1 deals with The Origins of Psychology and the Study of Consciousness. Volumes 2 and 3 deal with contemporary Cognitive and Neuropsychological Approaches to the Study of Consciousness. And Volume 4 focuses mainly on New Directions: Psychogenesis, Transformations of Consciousness and Non-reductive, Integrative Theories, which deal with issues likely to expand current, mainstream thought in potentially novel, and, sometimes, challenging directions. The printed, 4-Volume collection presents 89 major readings (or salient extracts from major readings) drawn from the entire field of Consciousness Studies, along with these introductions and an extensive index. It also introduces 5 additional readings that were selected for inclusion, but could not be reprinted for the reason that reprint permissions were prohibitively expensive. Although these online Companions cannot substitute for the 2000 page hard copy, they do provide a wealth of additional resources in the form of online links to supplementary readings (marked in pink) and to the readings themselves (marked in blue). In many cases the online sources are freely available or available through institutional subscriptions. Links are also provided for some of the readings that require access to complex colour plates, thereby making the four Companions complementary to the collection itself. This Companion to Volume 1 focuses on the selection criteria for the collection, the problems presented by consciousness and how to organize these into groups, the ancient history of thought about consciousness, mind and soul, the emergence of psychology as the empirical study of consciousness and mind, the emergence of behaviorism, cognitive psychology and the re-emergence of the study of mind, initial ideas about the role of consciousness in human information processing, the strengths of functionalist accounts of mind, the weaknesses of functionalist accounts of consciousness, competing psychological theories about the nature and function of consciousness, interdisciplinary influences, and the formation of Consciousness Studies.

Definitions of consciousness need to be sufficiently broad to include all examples of conscious states and sufficiently narrow to exclude entities, events and processes that are not conscious. Unfortunately, deviations from these simple principles are common in modern consciousness studies, with consequent confusion and internal division in the field. The present paper gives example of ways in which definitions of consciousness can be either too broad or too narrow. It also discusses some of the main ways in which pre-existing theoretical commitments (about the nature of consciousness, mind and world) have intruded into definitions. Similar problems can arise in the way a “conscious process” is defined, potentially obscuring the way that conscious phenomenology actually relates to its neural correlates and antecedent causes in the brain, body and external world. Once a definition of “consciousness” is firmly grounded in its phenomenology, investigations of its ontology and its relationships to entities, events and processes that are not conscious can begin, and this may in time transmute the meaning (or sense) of the term. As our scientific understanding of these relationships deepen, our understanding of what consciousness is will also deepen. A similar transmutation of meaning (with growth of knowledge) occurs with basic terms in physics such as "energy", and "time.".

The following extracts with connecting comments suggest a departure point for a definitions of consciousness that preserves its everyday phenomenology while allowing an understanding of what consciousness is to deepen as scientific investigation proceeds. I argue that current definitions are often theory-driven rather than following the contours of ordinary experience. Consequently they are sometimes too broad, sometimes too narrow, and sometimes not definitions of phenomenal consciousness at all. As an alternative, an ecologically valid, reflexive approach to consciousness is suggested that is consistent with science and with common sense

Physicalists commonly argue that conscious experiences are nothing more than states of the brain, and that conscious qualia are observer-independent, physical properties of the external world. Although this assumes the 'mantle of science,' it routinely ignores the findings of science, for example in sensory physiology, perception, psychophysics, neuropsychology and comparative psychology. Consequently, although physicalism aims to naturalise consciousness, it gives an unnatural account of it. It is possible, however, to develop a natural, nonreductive, reflexive model of how consciousness relates to the brain and the physical world. This paper introduces such a model and how it construes the nature of conscious experience. Within this model the physical world as perceived is viewed as part of conscious experience not apart from it. While in everyday life we treat this phenomenal world as if it is the "physical world", it is really just one biologically useful representation of what the world is like that may differ in many respects from the world described by physics. How the world as perceived relates to the world as described by physics can be investigated by normal science . This model of consciousness appears to be consistent with both third-person evidence of how the brain works and with first-person evidence of what it is like to have a given experience. According to the reflexive model, conscious experiences are really how they seem

(From the Publisher 2017) Featuring many important updates and revisions, the highly-anticipated second edition of The Blackwell Companion to Consciousness offers a collection of readings that together represent the most thorough and comprehensive survey of the nature of consciousness available today. Chapters delve deeply into the wide variety of scientific and philosophical problems that arise from the study of consciousness—as well as the philosophical, cognitive, neuroscientific, and phenomenological approaches to solving them. Along with updates to existing scientific readings reflecting the latest research data, this edition features 18 entirely new theoretical, empirical and methodological chapters covering such areas as integrated information theory, the resurgence in panpsychism, the renewed interest in more sophisticated first-person methodologies for the investigation of conscious phenomenology, and many others. Featuring contributions by leading experts in the study of consciousness, from across a variety of academic disciplines, the 54-chapter collection reasserts its role as the most thorough, authoritative, and up-to-date survey of the subject available today. Illuminating and thought-provoking, The Blackwell Companion to Consciousness, Second Edition is an indispensable resource for those wishing to gain insights into the latest contemporary thinking on consciousness.

(Publisher's Description) In the World Library of Psychologists series, international experts themselves present career-long collections of what they judge to be their finest pieces - extracts from books, key articles, salient research findings, and their major practical theoretical contributions. In this volume Max Velmans reflects on his long-spanning and varied career, considers the highs and lows in a brand new introduction and offers reactions to those who have responded to his published work over the years. This book offers a unique and compelling collection of the best publications in consciousness studies from one of the few psychologists to treat the topic systematically and seriously. Velmans’ approach is multi-faceted and represents a convergence of numerous fields of study – culminating in fascinating insights that are of interest to philosopher, psychologist and neuroscientist alike. With continuing contemporary relevance, and significant historical impact, this collection of works is an essential resource for all those engaged or interested in the field of consciousness studies and the philosophy of the mind.

(for online upload) The readings in Investigating Phenomenal Consciousness (2000) were developed from an International Symposium on Methodologies for the Study of Consciousness: A new Synthesis,” that I organised in April, 1996, funded and hosted by the Fetzer Institute, Wisconsin, USA, with the aim of fostering the development of first-person methods that could be used in conjunction with already well-developed third-person methods for investigating phenomenal consciousness. In this Introduction, we briefly survey the state of the art at that time, the reasons for a resurgence of interest in consciousness, the available methodologies, the reasons for increasing dissatisfaction with the adequacy of reductive third-person methods, various difficulties facing the development of rigorous first-person methods, and various creative approaches to solving these difficulties. Suggestions are also made about how to heal the fragmentation in consciousness studies, by placing different approaches to the study of consciousness into a broader context, establishing their domain of applicability and providing some bases for synthesis.

Dualists believe that experiences have neither location nor extension, while reductive and ‘non-reductive’ physicalists (biological naturalists) believe that experiences are really in the brain, producing an apparent impasse in current theories of mind. Enactive and reflexive models of perception try to resolve this impasse with a form of “externalism” that challenges the assumption that experiences must either be nowhere or in the brain. However, they are externalist in very different ways. Insofar as they locate experiences anywhere, enactive models locate conscious phenomenology in the dynamic interaction of organisms with the external world, and in some versions, they reduce conscious phenomenology to such interactions, in the hope that this will resolve the hard problem of consciousness. The reflexive model accepts that experiences of the world result from dynamic organism–environment interactions, but argues that such interactions are preconscious. While the resulting phenomenal world is a consequence of such interactions, it cannot be reduced to them. The reflexive model is externalist in its claim that this external phenomenal world, which we normally think of as the “physical world,” is literally outside the brain. Furthermore, there are no added conscious experiences of the external world inside the brain. In the present paper I present the case for the enactive and reflexive alternatives to more classical views and evaluate their consequences. I argue that, in closing the gap between the phenomenal world and what we normally think of as the physical world, the reflexive model resolves one facet of the hard problem of consciousness. Conversely, while enactive models have useful things to say about percept formation and representation, they fail to address the hard problem of consciousness

Modern consciousness studies are in a healthy state, with many progressive empirical programmes in cognitive science, neuroscience and related sciences, using relatively conventional third-person research methods. However not all the problems of consciousness can be resolved in this way. These problems may be grouped into problems that require empirical advance, those that require theoretical advance, and those that require a re-examination of some of our pre-theoretical assumptions. I give examples of these, and focus on two problems—what consciousness is, and what consciousness does—that require all three. In this, careful attention to conscious phenomenology and finding an appropriate way to relate first-person evidence to third-person evidence appears to be central to progress. But we may also need to re-examine what we take to be “natural facts” about the world, and how we can know them. The same appears to be true for a trans-cultural understanding of consciousness that combines classical Indian phenomenological methods with the third-person methods of Western science.

This commentary elaborates on Gray's conclusion that his neurophysiological model of consciousness might explain how consciousness arises from the brain, but does not address how consciousness evolved, affects behaviour or confers survival value. The commentary argues that such limitations apply to all neurophysiological or other third-person perspective models. To approach such questions the first-person nature of consciousness needs to be taken seriously in combination with third-person models of the brain.

This chapter examines the similarities and differences between physical, psychological and virtual realities, and challenges some conventional, implicitly dualist assumptions about how these relate to each other. Virtual realities are not easily understood in either dualist or materialist reductive terms, as they exemplify the reflexive nature of perception. The chapter summarises some of the evidence for this “reflexive model”—and examines some of its consequences for the “hard” problem of consciousness. The chapter then goes on to consider how these realities might relate to some grounding reality or thing-itself, and considers some of the personal and social consequences of becoming increasingly immersed in virtual realities. Although this chapter was published in 1998 and develops work published in 1990, it presents a form of “radical externalism” that anticipates many themes in current (2006) internalism versus externalism debates about the nature of mind. It is also relevant to an understanding of virtual reality “presence.”

Viewed from a first-person perspective consciousness appears to be necessary for complex, novel human activity - but viewed from a third-person perspective consciousness appears to play no role in the activity of brains, producing a "causal paradox". To resolve this paradox one needs to distinguish consciousness of processing from consciousness accompanying processing or causing processing. Accounts of consciousness/brain causal interactions switch between first- and third-person perspectives. However, epistemically, the differences between first- and third-person access are fundamental. First- and third-person accounts are complementary and mutually irreducible.

Abstract. This introductory chapter was written in 1996, for a new book of review articles on the emerging science of consciousness, specifically aimed at undergraduate and postgraduate students by experts in the relevant fields. Following on a brief history, the chapter moves on to definitions of consciousness and background philosophical issues, and then introduces a unified, non-reductionist scientific approach. It then summarises major issues for studies of consciousness in cognitive psychology, including studies of attention, memory, the extent of preconscious analysis and the relation of consciousness more generally to human information processing. It then turns to the neuropsychology of consciousness, starting with some apparent neural requirements for the transition from preconscious to conscious states, various clinical dissociations of consciousness, conditions for integration (or binding) and, finally, clinical applications, including different forms of mind/body interaction and evidence for the causal efficacy of mental states. The chapter concludes that while some of the ancient problems of consciousness remain unsolved, its study has become the subject of a rapidly developing science.

Nature Network Groups hosted an invited workshop on 'Theories of Consciousness' during the second semester of 2009. There were presentations by each of 15 authors active in the field, followed by debate with other presenters and invitees. A week was allocated to each of the theories proposed; general discussion threads were also opened from time to time, as seemed appropriate. We offer here an account of the principal outcomes. It can be regarded as a contemporary, 'state of the art' snapshot of thinking in this field.

Investigations of the function of consciousness in human information processing have focused mainly on two questions: (1) where does consciousness enter into the information processing sequence and (2) how does conscious processing differ from preconscious and unconscious processing. Input analysis is thought to be initially "preconscious," "pre-attentive," fast, involuntary, and automatic. This is followed by "conscious," "focal-attentive" analysis which is relatively slow, voluntary, and flexible. It is thought that simple, familiar stimuli can be identified preconsciously, but conscious processing is needed to identify complex, novel stimuli. Conscious processing has also been thought to be necessary for choice, learning and memory, and the organization of complex, novel responses, particularly those requiring planning, reflection, or creativity.

The mysteries of consciousness have gripped the human imagination for over 2,500 years. At the dawn of the new millennium, Understanding Consciousness provides new solutions to some of the deepest puzzles surrounding its nature and function. Drawing on recent scientific discoveries, Max Velmans challenges conventional reductionist thought, providing an understanding of how consciousness relates to the brain and physical world that is neither dualist, nor reductionist. Understanding Consciousness will be of great interest to psychologists, philosophers, neuroscientists and other professionals concerned with mind/body relationships, and all who care deeply about this subject.