This chapter contains sections titled: Notes.

Hallucinations are among the most impressive of psychopathological symptoms and may appear in all the sensory modalities. They are the most common symptom in schizophrenia, where patients usually experience auditory hallucinations, often hearing voices which speak to them in direct communication or in the form of running commentary. One of the major research strategies in psychopathology during the last years has become the neuropsychological reconstruction of psychopathological symptoms in order to detect basic “core” deficits of the different (...) symptoms. Given the successful identification of such core deficits, they may then serve as heuristic tools to identify candidate brain regions of putative pathology. These brain sites in turn can be explored with respect to their impact for the pathogenesis of schizophrenia. Among these neuropsychological approaches, one of the most prominent concepts reconstructing schizophrenic symptomatology is the concept of a self-monitoring disturbance, based on the conceptual and empirical work of the group around Christopher Frith. Although this conceptualization is evidence-based and appears plausible, it does not fully explain the high degree of certainty or confidence with which schizophrenic patients usually judge the reality status of their hallucinations and the frequency with which the latter might occur. The concept of self-monitoring disturbance thus provides a necessary but not a sufficient theoretical account of how hallucinations are generated. (shrink)

Hallucinations are among the most impressive of psychopathological symptoms and may appear in all the sensory modalities. They are the most common symptom in schizophrenia, where patients usually experience auditory hallucinations, often hearing voices which speak to them in direct communication or in the form of running commentary. One of the major research strategies in psychopathology during the last years has become the neuropsychological reconstruction of psychopathological symptoms in order to detect basic “core” deficits of the different (...) symptoms. Given the successful identification of such core deficits, they may then serve as heuristic tools to identify candidate brain regions of putative pathology. These brain sites in turn can be explored with respect to their impact for the pathogenesis of schizophrenia. Among these neuropsychological approaches, one of the most prominent concepts reconstructing schizophrenic symptomatology is the concept of a self-monitoring disturbance, based on the conceptual and empirical work of the group around Christopher Frith. Although this conceptualization is evidence-based and appears plausible, it does not fully explain the high degree of certainty or confidence with which schizophrenic patients usually judge the reality status of their hallucinations and the frequency with which the latter might occur. The concept of self-monitoring disturbance thus provides a necessary but not a sufficient theoretical account of how hallucinations are generated. (shrink)

This paper is a critical analysis and overview of body image conceptualization and its scope and limits within the field of eating disorders up to the present day. In addition, a concept ofemotional bodily experienceis advanced in an attempt to shift towards a more comprehensive and multidimensional perspective for thelived bodyof these patients. It mainly considers contributions from phenomenology, embodiment theories and a review of the empirical findings that shed light on the emotional bodily experience in (...) class='Hi'>eating disorders. It proposes an ‘embodied defense’ that leads patients to experiencing their own bodies as objects. This proposal highlights the need for new psychotherapeutic tools in the treatment ofeds that take into account the bodily resonance of emotions and their use for improving adaptive responses to the environment: it calls for helping patients to recover the subjective experience of their bodies. (shrink)

We present the set and setting of the velada, the Mazatec ritual of divination and healing. We highlight the subjective experiences of individuals who consumed sacred mushrooms and interpret them from their cultural and community contexts, but also from findings derived from experimental and neuroscientific research. We understand that the experiences connected to sacred mushrooms can be explained by the effects of psilocybin on the neurobiology of emotions, decision making, and visual, auditory, and bodily imagery. (...) But we also understand that experimentation does not consider the individual and collective history of the person, and that the velada can provide guidance for integrating a person’s history and beliefs into experimental designs. The resurgence of psychedelic medicine prompts us into a transdisciplinary dialogue that encompasses both the anthropological perspective and the set and setting of the entheogenic experience during the sacred mushroom ritual. (shrink)

The purpose of this paper is to define and describe the main phenomenological dimensions of the life-world of persons prone to Feeding and Eating Disorders (FEDs), within the framework of a model that considers abnormal eating behaviour an epiphenomenon of a more profound disorder of lived corporeality and identity. The core idea is that persons with FEDs experience their own body first and foremost as an object being looked at by another, rather than coenaesthetically or from (...) a first-person perspective. Alienation from one’s own body and the need to feel oneself only through the gaze of the others can be illuminated by looking at it in the light of the Sartrean concept of feeling a lived-body-for-others. (shrink)

© British Society of Aesthetics 2017. Published by Oxford University Press on behalf of the British Society of Aesthetics. All rights reserved. For Permissions, please email: [email protected] two books contribute, each in a very different way, to the reflection on a timeless subject: eating. While Eat This Book deals with a polemic subject, Taste as Experience focuses on the general experience of the simple act of eating and drinking and how this contributes to philosophical reflection. These (...) questions are far from trivial and it is necessary to address these subjects in a context where each citizen is increasingly led to think about the environmental and ethical impacts of his food consumption. Furthermore, the pleasure that comes from the act of eating, far from being a hedonistic fantasy, allows us to reflect on our relationship to the world. In other words: What is the symbolic role that food... (shrink)

The recently celebrated division into ‘easy’ and ‘hard’ problems of consciousness is unfortunate and misleading. Built on functionalist grounds, it carves up the subject matter by declaring that the most elusive parts need a fundamentally and intrinsically different solution. What we have, rather, are ‘difficult’ problems of conscious experience, but problems that are not difficult per se. Their difficulty is relative, among other things, to the kind of solution one is looking for and the tools used to accomplish the (...) task. I argue that the study of conscious experience in our scientific and philosophical tradition is a very difficult problem because it has been addressed with inappropriate tools: with harmful long-lasting and inadequate dogmas that have dogged science for centuries. I describe five of these dogmas, which are: the existence of an objective reality independent of human understanding; the subordination of epistemology to ontology; the restricted view of the objectivist-subjectivist dichotomy; the exclusion of the body from the study of the mind; and the idea of explaining the mind in terms of the neurophysiological processes of individual brains. I claim that conscious experience is not a transcendental, paranatural, mystic or magic phenomenon. It is tractable and approachable with scientific methods. However, one must look not only for non-reductionist views to approach it, but also for views that avoid the dogmas here described. Conscious experience is a living phenomenon and it has to be understood as such. Accordingly, our understanding of it has to make sense at several levels, from evolution to morphophysiology, from neuroanatomy to language. I put forward an approach to conscious experience which is free of the dogmas that make the study of conscious experience so difficult. This view, called ecological naturalism, is a non-functionalist and non-reductive view that provides an naturalistic account of the mind. It also puts special emphasis on irreducible supra-individual biological processes that are essential in the realization of mental phenomena and therefore conscious experience. (shrink)

Drawing upon core phenomenological contributions of the last decades, the present paper provides an integrated description of the development of auditory hallucinations in schizophrenia. Specifically, these contributions are the transitional sequences of development of psychotic symptoms of schizophrenia as envisioned by Klosterkötter and rooted in the basic symptoms approach, Conrad’s Gestalt-analysis of developing psychosis, and Sass and Parnas’ self-disturbance approach. Klosterkötter’s contribution provides a general descriptive psychopathological approach to the transitional sequence of the development of auditory hallucinations. The (...) key concepts in Conrad’s proposal are discussed, as their role is central as driving forces of the process from non-psychotic symptoms to overt hallucinations. Finally, Parnas and Sass link psychiatry to philosophy and psychology, and provide an in-depth and thorough description of these phenomena in their work on schizophrenia as a disorder of consciousness and self-experience with hyper-reflexivity and diminished self-affection as key aspects. (shrink)

Relationalism maintains that mind-independent objects are essential constituents of veridical perceptual experiences. According to the argument from hallucination, relationalism is undermined by perfect hallucinations, experiences that are introspectively indistinguishable from veridical perceptual experiences but lack an object. Recently, a new wave of relationalists have responded by questioning whether perfect hallucinations are possible: what seem to be perfect hallucinations may really be something else, such as illusions, veridical experiences of non-obvious objects, or experiences that are not (...) genuinely possible. This paper argues that however well new wave relationalism may handle brains in vats, drug users “seeing” pink elephants, and other extraordinary hallucinations, it struggles to accommodate mundane hallucinations, such as “hearing” your child cry out from the room down the hall when she is actually sound asleep or “feeling” vibrations on your thigh even when your phone isn't in your pocket. Mundane hallucinations are best explained as byproducts of noise in the perceptual system, and noise-induced hallucinations are resistant to the strategies that new wave relationalists deploy to explain away other hallucinations. Mundane hallucinations can thus underpin an especially powerful version of the argument from hallucination. (shrink)

Phenomenal character is determined by representational content, which both hallucinatory and veridical experiences can share. But in the case of veridical experience, unlike hallucination, the external objects of experience literally have the properties one is aware of in experience. The representationalist can accept the common factor assumption without having to introduce sensory intermediaries between the mind and the world, thus securing a form of direct realism.

In Real Hallucinations, Matthew Ratcliffe offers a philosophical examination of the structure of human experience, its vulnerability to disruption, and how it is shaped by relations with other people. He focuses on the seemingly simple question of how we manage to distinguish among our experiences of perceiving, remembering, imagining, and thinking. To answer this question, he first develops a detailed analysis of auditory verbal hallucinations (usually defined as hearing a voice in the absence of a speaker) and (...) thought insertion (somehow experiencing one's own thoughts as someone else's). He shows how thought insertion and many of those experiences labeled as "hallucinations" consist of disturbances in a person's senseof being in one type of intentional state rather than another. Ratcliffe goes on to argue that such experiences occur against a backdrop of less pronounced but wider-ranging alterations in the structure of intentionality. In so doing, he considers forms of experience associated with trauma, schizophrenia, and profound grief. The overall position arrived at is that experience has an essentially temporal structure, involving patterns of anticipation and fulfillment that are specific to types of intentional states and serve to distinguish them phenomenologically. Disturbances of this structure can lead to various kinds of anomalous experience. Importantly, anticipation-fulfillment patterns are sustained, regulated, and disrupted by interpersonal experience and interaction. It follows that the integrity of human experience, including the most basic sense of self, is inseparable from how we relate to other people and to the social world as a whole. (shrink)

Perceptual experiences have been construed either as representational mental states—Representationalism—or as direct mental relations to the external world—Disjunctivism. Both conceptions are critical reactions to the so-called ‘Argument from Hallucination’, according to which perceptions cannot be about the external world, since they are subjectively indiscriminable from other, hallucinatory experiences, which are about sense-data ormind-dependent entities. Representationalism agrees that perceptions and hallucinations share their most specific mental kind, but accounts for hallucinations as misrepresentations of the external world. According (...) to Disjunctivism, the phenomenal character of perceptions is exhausted by worldly objects and features, and thus must be different from the phenomenal character of hallucinations. Disjunctivism claims that subjective indiscriminability is not the result of a common experiential ground, but is because of our inability to discriminate, from the inside, hallucinations from perceptions. At first sight, Representationalism is more congenial to the way cognitive science deals with perception. However, empirically oriented revisions of Disjunctivism could be developed and tested by giving a metacognitive account of hallucinations. Two versions of this account can be formulated, depending on whether metacognition is understood as explicit metarepresentation or as implicit monitoring of first-order informational states. The first version faces serious objections, but the second is more promising, as it embodies a more realistic view of perceptual phenomenology as having both sensory and affective aspects. Affectbased phenomenology is constituted by various metacognitive feelings, such as the feeling of being perceptually confronted with the world itself, rather than with pictures or mere representations. (shrink)

Ordinary people tend to be realists regarding perceptual experience, that is, they take perceiving the environment as a direct, unmediated, straightforward access to a mindindependent reality. Not so for (ordinary) philosophers. The empiricist influence on the philosophy of perception, in analytic philosophy at least, made the problem of perception synonymous with the view that realism is untenable. Admitting the problem (and trying to offer a view on it) is tantamount to rejecting ordinary people’s implicit realist assumptions as naive. So (...) what exactly is the problem? We can approach it via one of the central arguments against realism – the argument from hallucination. The argument is intended as a proof that in ordinary, veridical cases of perception, perceivers do not have an unmediated perceptual access to the world. There are many versions of it; I propose the following1: 1. Hallucinations that are subjectively indistinguishable from veridical perceptions are possible. 2. If two subjective states are indistinguishable, then they have a common nature. 3. The contents of hallucinations are mental images, not concrete external objects. 4. Therefore, the contents of veridical perceptions are mental images rather than concrete external objects. The key move is, I believe, from the fact that hallucinations that are subjectively indistinguishable from cases of veridical perception are possible to an alleged common element, factor, or nature, in the form of a mental state, in the two cases – that is, premise 2. Disjunctivism, at its core, can be taken as simply denying this move, and arguing that all that follows from the premise stating the possibility of hallucinations that are subjectively indistinguishable from cases veridical perception is that there is a broader category, that of “experience as of...”, which encompasses both cases.. (shrink)

How is it that many schizophrenics identify certain instances of verbal imagery as hallucinatory? Most investigators have assumed that alterations in sensory features of imagery explain this. This approach, however, has not yielded a definitive picture of the nature of verbal hallucinations. An alternative perspective suggests itself if one allows the possibility that the nonself quality of hallucinations is inferred on the basis of the experience of unintendedness that accompanies imagery production. Information-processing models of “intentional” cognitive processes (...) call for abstract planning representations that are linked to goals and beliefs. Unintended actions - and imagery - can reflect planning disruptions whereby cognitive products do not cohere with concurrent goals. A model of schizophrenic speech disorganization is presented that postulates a disturbance of discourse planning. Insofar as verbal imagery can be viewed as inwardly directed speech, a consequence of such planning disturbances could be the production of unintended imagery. This link between the outward disorganization of schizophrenic speech and unintended verbal imagery is statistically supported by comparing the speech behavior of hallucinating and nonhallucinating schizophrenics. Studies of “borderline” hallucinations during normal, “goal-less” relaxation and drowsiness suggest that experiential unintendedness leads to a nonpathological variant of hallucinatory otherness that is correctable upon emerging from such passive cognitive states. This contrasts with the schizophrenic case, where nonconcordance with cognitive goals reinforces the unintendedness of verbal images and sustains the conviction of an external source. This model compares favorably with earlier models of verbal hallucinations and provides further evidence for a language production disorder in many schizophrenics.Short Abstract: How is it that many schizophrenics identify certain instances of verbal imagery as hallucinatory? This paper proposes that the critical feature identifying hallucinations is the experience of unintendedness. This experience is nonpathological during passive conscious states but pathological if occurring during goal-directed cognitive processing. A model of schizophrenic speech disorganization is presented that postulates a disturbance of discourse planning that specifies communicative intentions. These alterations could generate unintended verbal imagery as well. Statistical data are offered to support the model, and relevant empirical studies are reviewed. (shrink)

In discussions of arts and culture, food and drink are often relegated to the realms of mere decoration or mere necessity. However, like the term taste, which begins as one of the five senses but comes to be understood as the most sweeping term for human sensibility, eating and drinking can also be fundamental aesthetic experiences. In this book, author Leonard Barkan covers millennia of Western aesthetic and cultural activity, tracing the history of eating and drinking across literature, (...) art, philosophy, statecraft, religion, and historiography. Drawing on a myriad of historical and analytic perspectives, Barkan demonstrates how the materials of the dining table, the flavor and pleasure of food, and hunger and satiety are central to life and culture. He explores what it means to "read for the food" in works of art, literature, and philosophy, and demonstrates the central role that food played in Roman civilization. He examines the deeply culinary qualities of the Hebrew Bible and the New Testament, the relationship between food and drink and the culture of the Renaissance, and the literal acts of consumption that are endowed with sacred significance. By uncovering the gastronomic underplot in cultural and artistic works, Barkan proposes an interdisciplinary approach to the relation between sense experience and aesthetic experience, and considers what it means to move from the margins to the center in a study of culture. (shrink)

Qualitative inquiry into eating disorders is burgeoning, offering valuable and innovative insights into various aspects of the condition. This study used life‐history interviews with 20 women who had recovered from anorexia nervosa, bulimia nervosa or both and who had remained healthy. The interviews focused on the women's narratives and experience rather than a diagnostic therapeutic model. Three themes of control, connectedness and conflict emerged as significant in the development, experience of, and recovery from an (...) class='Hi'>eating disorder. The development of the condition was attributed to a lack of control, a sense of non‐connectedness to family and peers and extreme conflict with significant others. Recovery occurred when the women re‐engaged with life, developed skills necessary for conflict resolution and rediscovered their sense of self. Rather than viewing the development of, and recovery from an eating disorder as separate and discrete events, the data from the life‐history interviews suggest they are better viewed as one entity — that is, the journey of an individual attempting to discover and develop their sense of self. This perspective challenges some current constructs of eating disorders; it is not a condition in and of itself but a symptom of deeper issues that if addressed, when the individual is ‘ready’ to make that choice, will lead to recovery. (shrink)

ObjectiveThe buffering role of the hijab as a protective factor against eating pathology has been questioned in countries where wearing the hijab is compulsory, such as Iran; and, cross-cultural comparisons of body image in Iranian and Western women are sparse. Consequently, we examined sociocultural correlates of eating pathology in US and Iranian women.MethodCollege women from the US and Iran completed the Eating Disorder Examination-Questionnaire and the Sociocultural Attitude Toward to Appearance Questionnaire-4. Prior to examining main hypotheses, (...) we evaluated whether the scales perform similarly by culture.ResultsThe EDE-Q and SATAQ-4 were not invariant by culture indicating that the scales performed differently across groups, so separate analyses were conducted in each sample. Thin-ideal internalization and pressures for thinness were significant positive predictors of eating pathology in both US and Iranian women.ConclusionBoth pressures for thinness and thin-ideal internalization appear to be relevant to eating pathology in women from both cultures. However, there may be important cross-cultural differences in the interpretation or experience of these constructs. Further understanding of this measurement non-invariance and the ways in which Iranian women may be uniquely impacted by Western values of appearance is a critical next step. (shrink)

Sethi (2020) attempts to show that even if we keep Price’s intuition: the claim that having an experience as of an F make us aware of an instance of Fness, we can still block the Argument from Hallucination, and so reject the conclusion that we are aware of mind-dependent rather than mind-independent items when we undergo successful perceptions. In an attempt to demonstrate this, she formulates the Argument from Hallucination so that it relies on the principle that (...) if the existence of a neural state is sufficient for the existence of a property-instance, that property-instance is mind-dependent. I show how to reformulate the argument to avoid reliance on this, thus demonstrating against Sethi that it is possible to argue from acceptance of Price’s intuition to the claim that the items we’re directly aware of in the successful perceptual case are mind-dependent. (shrink)

Sensations can occur in the absence of perception and yet be experienced ‘as if’ seen, heard, tasted, or otherwise perceived. Two concepts used to investigate types of these sensory-like mental phenomena (SLMP) are mental imagery and hallucinations. Mental imagery is used as a concept for investigating those SLMP that merely resemble perception in some way. Meanwhile, the concept of hallucinations is used to investigate those SLMP that are, in some sense, compellingly like perception. This may be a difference (...) of degree. Attempts to reliably differentiate between instances of each type of SLMP remain unresolved. Despite this, the concepts of mental imagery and hallucinations are each routinely used independently of the other. These uses are especially interesting in those published accounts of experiments where equivalent findings about the neuroanatomical correlates of SLMP are reported in support of diverging knowledge-claims about the role of SLMP in neurocognitive processes. This practice presents a puzzle. To examine one aspect of this puzzle, I compare the uses of these two scientific concepts in three ways: examining their roles in differentiating between types of SLMP; exploring how their respective historical developments intersect; and analysing their contributions in neuroimaging experiments. In presenting this series of comparative analyses, I will draw on three themes from historical, philosophical, and social studies of scientific practices: interest in material contributions to knowledge; accounts of how concepts are used in experiments; and explorations of the historical conditions within which current practices emerge. Building on this literature, my comparative analyses supports five related claims. My first claim is that the concepts of mental imagery and hallucinations are each used as independent tools in neuroimaging experiments. My second claim is that, as experimental tools, the concepts of mental imagery and hallucinations are each used for investigating discrete epistemic goals. My third claim is that there are implicit interdependent associations that structure the uses of these two concepts as tools for independently investigating these discrete epistemic goals in neuroimaging experiments. This third claim rests on my analyses of both past and present uses of each concept. Firstly, as seen in their intersecting histories, there are disciplined performances of using the concepts of mental imagery and hallucinations that carry-along shared associations about the mediating role of SLMP in thought. Secondly, these interdependent ‘mediator-view’ associations continue to structure the independent uses of each concept as a tool for investigating SLMP in pursuit of specific goals. Taking this further, my fourth claim is that recognising the structured uses of the concepts of mental imagery and hallucinations can help to account for how equivalent SLMP-neuro-correlates are generated in support of diverging knowledge-claims. Finally, my fifth claim is that the structured uses of these concepts as tools can contribute to experiments in ways analogous to, yet not equivalent with, the active contributions of material instruments. Bringing these claims together, I argue that the concepts of mental imagery and hallucinations operate as structured tools that can actively contribute to the knowledge generated by neuroimaging experiments. In presenting this argument I seek to demonstrate that examining the structured uses of concepts as tools can complement existing approaches to studying how the heterogeneous dynamics of experimental practices can come to contribute to scientific knowledge in unintended ways. (shrink)

In this paper, I examine the so-called disjunctive views on hallucinations. I argue that neither of the options open to the disjunctivist is capable of accommodating basic phenomenological facts about hallucinatory experiences and the explanatory demands behind the classical argument from hallucination. A positive characterization of the hallucinatory case is not attractive to a disjunctivist once she is disposed to accept certain commonalities with veridical experiences. Negative disjunctivism glosses the hallucinatory disjunct in terms of indiscriminability. I will argue (...) that this move either renounces to characterize phenomenally the hallucinatory experience or does not take seriously questions about why indiscriminability is possible in the phenomenal realm. (shrink)

The paper proposes a minimal definition of dreaming in terms of immersive spatiotemporal hallucination (ISTH) occurring in sleep or during sleep–wake transitions and under the assumption of reportability. I take these conditions to be both necessary and sufficient for dreaming to arise. While empirical research results may, in the future, allow for an extension of the concept of dreaming beyond sleep and possibly even independently of reportability, ISTH is part of any possible extension of this definition and thus is a (...) constitutive condition of dreaming. I also argue that the proposed ISTH model of dreaming, in conjunction with considerations on the epistemic relationship between dreaming and dream reports, raises important questions about the extent to which dreams typically involve a detailed body representation—an assumption that plays an important role in philosophical work on dreaming. As a commonly accepted definition of dreaming is lacking in current dream research, the ISTH model, which integrates conceptual analysis and epistemological considerations with results from empirical research, is an important contribution to this field. By linking dreaming to felt presence, full-body illusions, and autoscopic phenomena such as out-of-body experiences in wakefulness and in the hypnagogic state, the ISTH model of dreaming also helps integrate dream research, both theoretically and experimentally, with the study of other altered states of consciousness involving hallucinations. It makes straightforward and investigable predictions by claiming that all of these experiences have amodal spatiotemporal hallucinations as their common denominator. Finally, it is theoretically relevant for the philosophical discussion on minimal phenomenal selfhood. (shrink)

What are hallucinations? A common view in the philosophical literature is that hallucinations are degenerate kinds of perceptual experience. I argue instead that hallucinations are degenerate kinds of sensory imagination. As well as providing a good account of many actual cases of hallucination, the view that hallucination is a kind of imagination represents a promising account of hallucination from the perspective of a disjunctivist theory of perception like naïve realism. This is because it provides a (...) way of giving a positive characterisation of hallucination—rather than characterising hallucinations in negative, relational, terms as mental events that are subjectively indistinguishable from veridical perceptual experiences. (shrink)

Based on recent insight into the thalamocortical system and its role in perception and conscious experience, a unified pathophysiological framework for hallucinations in neurological and psychiatric conditions is proposed, which integrates previously unrelated neurobiological and psychological findings. Gamma-frequency rhythms of discharge activity from thalamic and cortical neurons are facilitated by cholinergic arousal and resonate in networks of thalamocortical circuits, thereby transiently forming assemblies of coherent gamma oscillations under constraints of afferent sensory input and prefrontal attentional mechanisms. If (...) perception is based on synchronisation of intrinsic gamma activity in the thalamocortical system, then sensory input to specific thalamic nuclei may merely play a constraining role. Hallucinations can be regarded as underconstrained perceptions that arise when the impact of sensory input on activation of thalamocortical circuits and synchronisation of thalamocortical gamma activity is reduced. In conditions that are accompanied by hallucinations, factors such as cortical hyperexcitability, cortical attentional mechanisms, hyperarousal, increased noise in specific thalamic nuclei, and random sensory input to specific thalamic nuclei may, to a varying degree, contribute to underconstrained activation of thalamocortical circuits. The reticular thalamic nucleus plays an important role in suppressing random activity of relay cells in specific thalamic nuclei, and its dysfunction may be implicated in the biological vulnerability to hallucinations in schizophrenia. Combined with general activation during cholinergic arousal, this leads to excessive disinhibition in specific thalamic nuclei, which may allow cortical attentional mechanisms to recruit thalamic relay cells into resonant assemblies of gamma oscillations, regardless of their actual sensory input, thereby producing an underconstrained perceptual experience. Key Words: Charles Bonnet syndrome; gamma oscillations; hallucinations; late paraphrenia; Lewy body dementia; perception; schizophrenia; thalamocortical system. (shrink)

What we perceive is the product of an intrinsic process and not part of external physical reality. This notion is consistent with the philosophical position of transcendental idealism but also agrees with physiological findings on the thalamocortical system. -Frequency rhythms of discharge activity from thalamic and cortical neurons are facilitated by cholinergic arousal and resonate in thalamocortical networks, thereby transiently forming assemblies of coherent oscillations under constraints of sensory input and prefrontal attentional mechanisms. Perception and conscious experience may (...) be based on such assemblies and sensory input to thalamic nuclei plays merely a constraining role in their formation. In schizophrenia, the ability of sensory input to modulate self-organisation of thalamocortical activity may be generally reduced. If during arousal thalamocortical self-organisation is underconstrained by sensory input, then attentional mechanisms alone may determine the content of perception and hallucinations may arise. (shrink)

According to a familiar line of thinking, hallucination reveals that what we take to be direct experiences of the world are in fact mere appearances: appearances which give only mediate and unreliable testimony to reality. If we wish to secure knowledge of the world, we must transition to a different register, that of reason and judgment. In this classical analysis, non-normal perception functions to show the deficit of normal perception. Merleau-Ponty offers a strikingly different account of hallucination. Far from (...) inciting skeptical concerns, Merleau-Ponty’s analysis of hallucination in the Phenomenology of Perception in fact leads him to his first sustained account of perceptual faith. Perceptual faith, as our primary bond with the world, is at the heart of Merleau-Ponty’s response to skepticism, and it underlies both perception and hallucination. In this article, I show how this surprising analysis of hallucination is possible. (shrink)

Present study compared disturbed eating attitudes among male and female university students. For which it as postulated that female university students would have more disturbed eating attitudes as compare to male students. For that reason 200 males and 200 female university students from various universities of Karachi were incorporated in the study. Their age ranged from 19 to 25. Participants after verbal and written covenantfrom the heads of their institution were asked to fill the respondents’ profile (...) form to gather the participant’s demographic information, followed by Eating Attitude Test which was used to know ones disturbed eating ways. For statistical evaluation t-test was applied, which specified that male university students experience more disturbed eating attitudes compare to female learners. This clears that distressed eating attempts are not limited to females, but is now affecting males as well. Thus to avert its budding prevalence, teaching institutions should supervise its amassed risks in their students and stimulate them to healthy lines of eating. (shrink)

According to the epistemic theory of hallucination, the fundamental psychological nature of a hallucinatory experience is constituted by its being 'introspectively indiscriminable', in some sense, from a veridical experience of a corresponding type. How is the notion of introspective indiscriminability to which the epistemic theory appeals best construed? Following M. G. F. Martin, the standard assumption is that the notion should be construed in terms of negative epistemics: in particular, it is assumed that the notion should be (...) explained in terms of the impossibility that a hallucinator might possess a certain type of knowledge on a certain basis. I argue that the standard assumption is mistaken. I argue that the relevant notion of introspective indiscriminability is better construed in terms of positive epistemics: in particular, I argue that the notion is better explained by reference to the fact that it would be rational for a hallucinator positively to make a certain type of judgement, were that judgement made on a certain basis. (shrink)

This paper addresses the question of what happens to consciousness under the influence of psychedelic drugs—specifically of psilocybin, or “magic” mushrooms— and performs a Foucauldian discourse analysis upon the answers that have been variously proposed. Predominant societally legitimated answers (the pathological, psychological, and prohibition discourses) are those that, in Foucault's sense, are imposed from the outside as “scientific classifications,” that is, they are based upon observations of the effects of mushrooms on others. By contrast, a series of (...) resistive discourses (the recreational, psychedelic, entheogenic, and animistic discourses) have been constructed in opposition, as a means of making sense of the subjective experience of taking mushrooms. When critiqued, only the animistic discourse— the belief that mushrooms occasion encounters with discarnate spirit entities, or animaphany—transgresses a fundamental societal boundary. In the West, to believe in the existence of spirits is to risk being labeled “mad,” and as such the phenomenon of mushroom‐induced animaphany goes largely ignored. It nevertheless remains a phenomenon in need of further scholarly research. (shrink)

My primary aim in this article is to provide a philosophical account of the unity of hallucinations, which can capture both perceptual hallucinations (which are subjectively indistinguishable from perceptions) and non-perceptual hallucinations (all others). Besides, I also mean to clarify further the division of labour and the nature of the collaboration between philosophy and the cognitive sciences. Assuming that the epistemic conception of hallucinations put forward by M. G. F. Martin and others is largely on (...) the right track, I will focus on two main tasks: (a) to provide a satisfactory phenomenology of the subjective character of perceptions and perceptual hallucinations and (b) to redress the philosophers’ neglect of non-perceptual hallucinations. More specifically, I intend to apply one of the central tenets of the epistemic conception—that hallucinations can and should be positively characterised in terms of their phenomenological connections to perceptions—to non-perceptual hallucinations as well. That is, I will try to show that we can positively specify the class of non-perceptual hallucinations by reference to the distinctive ways in which we first-personally experience them and perceptions in consciousness. The task of saying more about their underlying third-personal nature may then be left to the cognitive sciences. (shrink)

Many take the possibility of hallucinations to imply that a relationalist account, according to which perceptual experiences are constituted by direct relations to ordinary mind-independent objects, is false. The common reaction among relationalists is to adopt a disjunctivist view that denies that hallucinations have the same nature as perceptual experiences. This paper proposes a non-disjunctivist response to the argument from hallucination by arguing that the alleged empirical and a priori evidence in support of the possibility of (...) class='Hi'>hallucinations is inconclusive. A corollary upshot of the article is that whether hallucinations are possible or not is still an open empirical question. (shrink)

I argue that there are no plausible non-representational explanations of episodes of hallucination. To make the discussion more specific, I focus on visual hallucinations in Charles Bonnet syndrome. I claim that the character of such hallucinatory experiences cannot be explained away non-representationally, for they cannot be taken as simple failures of cognizing or as failures of contact with external reality—such failures being the only genuinely non-representational explanations of hallucinations and cognitive errors in general. I briefly introduce a recent (...) computational model of hallucination, which relies on generative models in the brain, and argue that the model is a prime example of a representational explanation referring to representational mechanisms. The notion of the representational mechanism is elucidated, and it is argued that hallucinations—and other kinds of representations—cannot be exorcised from the cognitive sciences. (shrink)

Common wisdom includes expressions such as “there is no accounting for taste'’ that express a widely-accepted subjectivism about taste. We commonly say things like “I can’t stand anything with onions in it'’ or “Oh, I’d never eat sushi,'’ and we accept such from our friends and associates. It is the position of this essay that much of this language is actually quite unacceptable. Without appealing to complete objectivism about taste, I will argue that there are good reasons to think (...) that there will be fairly wide agreement between experienced palates on aesthetic preferences, and that this result will not necessarily agree with unexperienced and unreflective opinions on the matter. Subjectivism about aesthetic preference can be taken to justify the practice of picking eating (after all, who is better to say what I’ll enjoy than me?), while the position of this paper is that such picky eating is a moral failing. To be a picky eater is to have a significant lack of openness to new experiences. It involves an irresponsible level of fallibilism with respect to taste. Never venturing into new aesthetic landscapes leads to a sort of repetitiveness, which in turn leads to a life full of blandness and banality. (shrink)

In the Mindfulness-Based Eating Awareness Training program (MB-EAT) (Kristeller and Wolever, 2014; Kristeller and Wolever, in press), mindfulness practice is taught, mindful eating is cultivated, and self-acceptance and spiritual well-being are enhanced. An integrative concept is the value of cultivating ‘wisdom’ in regard to creating a new and sustainable relationship to eating and food. ‘Wisdom’ refers to drawing on personal experience and understanding in a flexible, insightful manner, rather than strictly following external rules and guidelines. Several (...) clinical trials involving variations of MB-EAT have documented substantive improvement in how people relate to their eating, including individuals with both binge eating disorder (BED) and subclinical eating issues. Based on the traditional value of contemplative practices for cultivating spiritual engagement, and on evidence from related research showing that spiritual well-being increases in the Mindfulness-Based Stress Reduction (MBSR) program and is related to other effects, we hypothesized that the MB-EAT program would also engage this aspect of experience, as assessed by the Functional Assessment of Chronic Illness Therapy – Spiritual Well-Being subscale (FACIT-Sp), and that increases in spiritual well-being would relate to other measures of adjustment such as emotional balance and improvement in disordered eating. Participants (N = 117) with moderate to morbid obesity, including 25.6% with BED, were randomly assi... (shrink)

I consider a new, non-disjunctive strategy for ‘relational’ or ‘naïve realist’ theories to respond to arguments from ‘perfect’ (causally matching) hallucinations. The strategy, in a nutshell, is to treat such hypothetical cases as instances of perception rather than hallucination. After clarifying the form and dialectic of such arguments, I consider three objections to the strategy. I provide answers to the first two objections but concede that the third — based on the possibility of ‘chaotic’ (uncaused) perfect hallucinations (...) — cannot obviously be dealt with by the proposed strategy. However, such ‘chaotic’ scenarios are also problematic for standard representational accounts of experience. Thus I conclude that perfect hallucinations pose no more of a threat to the relational theory than to its main representational rival. (shrink)

In this paper, we present new cases of illusion and hallucination that have not heretofore been identified. We argue that such cases show that the traditional accounts of illusion and hallucination are incorrect because they do not identify all of the cases of non-veridical experience that they need to and they elide important differences between cases. In light of this, we present new and exhaustive definitions of illusion and hallucination. First, we explicate the traditional accounts of illusion and hallucination. (...) We then proceed to outline cases of pure property experience—that is, experience as of properties, but not as of objects. We suggest that some might find it to be plausible that olfactory experience is of this kind. We argue that, within instances of such pure property experience, one can identify cases of veridical property perception, illusory property perception and hallucinatory property experience. With these distinctions in hand, we re-examine ordinary cases of experiences as of objects having properties. Drawing on the ideas uncovered by considering pure property experience, we bring to light many new cases of illusion and hallucination within ordinary experience as of objects having properties. These consist in different combinations of veridical perception, illusory perception and hallucination of both objects and properties. In order to accept that these new cases of illusion and hallucination exist in ordinary experience as of objects having properties, nothing turns on accepting the idea that there is pure property experience, or that olfactory experience is an instance of it. Such a conception of experience is simply a tool—a ladder to gain a good vantage point from which one can appreciate that there are these further cases. But this is a ladder that, as Wittgenstein might say, can be thrown away once it is used. Identifying new instances of illusion and hallucination provides much needed, important data for testing theories of experience and perception—theories that are frequently motivated, and should be judged, by their ability to account for cases of illusion and hallucination. (shrink)

What we perceive is the product of an intrinsic process and not part of external physical reality. This notion is consistent with the philosophical position of transcendental idealism but also agrees with physiological findings on the thalamocortical system. -Frequency rhythms of discharge activity from thalamic and cortical neurons are facilitated by cholinergic arousal and resonate in thalamocortical networks, thereby transiently forming assemblies of coherent oscillations under constraints of sensory input and prefrontal attentional mechanisms. Perception and conscious experience may (...) be based on such assemblies and sensory input to thalamic nuclei plays merely a constraining role in their formation. In schizophrenia, the ability of sensory input to modulate self-organisation of thalamocortical activity may be generally reduced. If during arousal thalamocortical self-organisation is underconstrained by sensory input, then attentional mechanisms alone may determine the content of perception and hallucinations may arise. (shrink)

In his influential paper “Grasping the Third Realm,” John Bengson raises the question of how we can non-accidentally grasp abstract facts. What distinguishes successful intuition from hallucinatory intuition? Bengson answers his “non-accidental relation question” by arguing for a constitutive relationship: The intuited object is a literal constituent of the respective intuition. Now, the problem my contribution centers around is that Bengson’s answer cannot be the end of the story. This is because, as Bar Luzon and Preston Werner have recently (...) pointed out, this answer leads to the follow-up question of why certain intuitional experiences are constituted by the facts, but others are not. My objective is to answer this question by specifying precisely what is epistemically defective about intellectual hallucinations. My result is that, in stark contrast to perception, intellectual hallucinations are epistemically defective in the sense that something is overlooked. In successful intuition, by contrast, all relevant possibilities/scenarios are considered/imagined. This has crucial epistemological implications. In particular, I argue that intuitions exhibiting a certain phenomenology cannot fail to successfully grasp abstract facts. I call this the non-accidental correctness thesis, which constitutes the main thesis of this paper. (shrink)

This book provides the first full-length treatment of disjunctivism about visual experiences in the service of defending a naive realist theory of veridical visual perception. It includes detailed theories of hallucination and illusion that show how such states can be indistinguishable from veridical experiences without sharing any common character.

Since disjunctivists when talking about perception deny that hallucinations and veridical perceptions have a common fundamental nature, they need some other way to account for the fact that these kinds of experiences can ‘seem the same’ from the inside. A natural response is to give a purely epistemic account of hallucination, according to which there is nothing more to hallucinations than their indiscriminability from veridical perceptions. This chapter argues that the epistemic conception of hallucination falters in (...) its treatment of cognitively unsophisticated creatures, and that it cannot respect all the facts about what we can know on the basis of introspection. (shrink)

Direct realists think that we can't get a clear view the nature of /hallucinating a white picket fence/: is it /representing a white picket fence/? is it /sensing white-picket-fencily/? is it /being acquainted with a white' picketed' sense-datum/? These are all epistemic possibilities for a single experience; hence they are all metaphysical possibilities for various experiences. Hallucination itself is a disjunctive or "multidisjunctive" category. I rebut MGF Martin's argument from statistical explanation for his "epistemic" conception of hallucination, but (...) his view embeds in my view as a "reference-fixer". (shrink)

The aim of this paper is to sketch a framework for perceiving the act of consumption as an aesthetic phenomenon. I shall argue that, under some circumstances, it is possible to receive aesthetic satisfaction from the act of eating food, in which the object of one’s appreciation is, for the most part, considered separately from what is actually eaten. I propose to call such a process “aesthetic eating” and argue that due to its aesthetic autonomy it (...) might be a potential factor in enjoying certain kinds of food. This phenomenon is apparent in the case of the types of food that are acquired tastes. It is plausible that distinguishing the aesthetic pleasures of food from the ones associated with the act of eating can not only enrich our aesthetic life but also deepen the aesthetics of our overall gustatory experience. (shrink)

In this essay, I will argue that contemporary ecofeminist discourse, while potentially adequate to deal with the issue of animals, is now inadequate because it fails to give consistent conceptual place to the domination of animals as a significant aspect of the domination of nature. I will examine six answers ecofeminists could give for not including animals explicitly in ecofeminist analyses and show how a persistent patriarchal ideology regarding animals as instruments has kept the experience of animals from (...) being fully incorporated within ecofeminism. (shrink)

Naïve realists hold that the phenomenology of veridical perceptual experience is in part constituted by environmental objects that the subject is perceiving. Although naïve realism is well-motivated by considering the cognitive and epistemic roles of the phenomenology of veridical perceptual experience, it is considered difficult to explain hallucinatory and imaginative experiences. This paper provides three arguments to address these explanatory problems systematically on behalf of naïve realism. First, I argue that the imagination view of hallucination (IH), which states (...) that hallucinations are involuntary sensory imagination, can be applied to total and neutrally matching hallucinations. Second, I argue for the conjunction of IH and the representational view of imagination (RI), according to which sensory imagination (including hallucination) is representational (shortly RIH). Third, I argue that naïve realism can coherently be integrated with RIH. I finally present an integrative model of perception, imagination and hallucination from the perspective of the combination of naïve realism and RIH. (shrink)

Great cases are those judicial decisions around which the common law develops. This book explores eight exemplary cases from the United Kingdom, the United States and Australia that show the law as a living, breathing and down-the-street experience. It explores the social circumstances in which the cases arose and the ordinary people whose stories influenced and shaped the law as well as the characters and institutions that did much of the heavy lifting. By examining the consequences and fallout (...) of these decisions, the book depicts the common law as an experimental, dynamic, messy, productive, tantalizing and bottom-up process, thereby revealing the diverse and uncoordinated attempts by the courts to adapt the law to changing conditions and shifting demands. Great cases are one way to glimpse the workings of the common law as an untidy but stimulating exercise in human judgment and social accomplishment. (shrink)

Relationalism about perception minimally claims that instances of perception -- in contrast to instances of hallucination -- are constituted by the external objects perceived. Most variants of relationalism furthermore maintain that this difference in constitution is due to a difference in mental kind. One prominent example is acquaintance relationalism, which argues that perceptions are relational in virtue of acquainting us with external objects. I distinguish three variants of acquaintance relationalism -- which differ in their answers to the question of which (...) kind of awareness hallucinations involve -- and object to all of them on two main grounds. First, none of the variants can explain how hallucinations can be introspectively indistinguishable from perceptions, despite their essential difference in awareness. Second, all three variants are unable to identify the feature of hallucinations that ensure that these experiences possess the same motivational power as corresponding perceptions. Since aquaintance relationalism can satisfy neither of these two desiderata on relationalist views, it should be rejected. Hence, if we want to be relationalists about perception, we should endorse a form of relationalism that treats perceptions -- as well as hallucinations -- as representational. (shrink)

The claim that perfect hallucination is introspectively indistinguishable from perception has been a centrepiece of philosophical theorizing about sense experience. The most common interpretation of the indistinguishability claim is modal: that it is impossible to distinguish perfect hallucination from perception through introspection alone. I run through various models of introspection and show that none of them can accommodate the modal interpretation. Rejecting the modal interpretation opens up two alternative interpretations of the indistinguishability claim. According to the generic (...) interpretation, hallucination is indistinguishable from perception despite the existence of possible exceptions, while according to the actuality interpretation, the indistinguishability of hallucination from perception consists in the actual failure to distinguish hallucination from perception. These alternative understandings of the indistinguishability claim have a number of significant implications for the problem of perception, including the rejection of perfect hallucination and illusion in favour of our ordinary, non-philosophical concepts of these states. (shrink)

One central fact about hallucinations is that they may be subjectively indistinguishable from perceptions. Indeed, it has been argued that the hallucinatory experiences concerned cannot— and need not—be characterized in any more positive general terms. This epistemic conception of hallucinations has been advocated as the best choice for proponents of experiential (or “naive realist”) disjunctivism—the view that perceptions and hallucinations differ essentially in their introspectible subjective characters. In this chapter, I aim to formulate and defend an (...) intentional alternative to experiential disjunctivism called experiential intentionalism. This view not only enjoys some advantages over its rival but is also compatible with the epistemic conception of hallucinations, as well as with the disjunctivist view that perceptions and hallucinations differ essentially in their third-personal structures (e.g., their causal, informational, or reason-providing links to reality). It also maintains that there are actually two aspects to the subjective indistinguishability of mental episodes: (i) we cannot distinguish their first-personal characters in introspective awareness; and (ii) we cannot distinguish their third-personal structures in experiential awareness—that is, in how they are given to consciousness. While experiential disjunctivism makes the mistake of ignoring (ii) and reducing subjective indiscriminability to (i), experiential intentionalism correctly identifies (ii) as the primary source of the subjective indistinguishability of perception-like hallucinations. Accordingly, the intentional error involved in such hallucinations is due to the fact that we consciously experience them as possessing a relational structure. (shrink)