Cognitive neuropsychiatry (CN) is the explanation of psychiatric disorder by the methods of cognitive neuropsychology. Within CN there are, broadly speaking, two approaches to delusion. The first uses a one-stage model, in which delusions are explained as rationalizations of anomalous experiences via reasoning strategies that are not, in themselves, abnormal. Two-stage models invoke additional hypotheses about abnormalities of reasoning. In this paper, I examine what appears to be a very strong argument, developed within CN, in favor of a twostage explanation (...) of the difference in content between the Capgras and Cotard delusions. That explanation treats them as alternative rationalizations of essentially the same phenomenology. I show, however, that once we distinguish the phenomenology (and the neuroetiology), a one-stage model is adequate. In the final section I make some more general remarks on the oneand two-stage models. (shrink)

A recent strand in the philosophical literature on addiction emphasizes problems with diachronic self-control. Hanna Pickard, for example, argues that an important aspect of addiction consists in inability to identify with a non-addicted future self. This literature sits alongside another that treats addiction as the product of neural changes that “hijack” mechanisms of reward prediction, habit formation decision making and cognitive control. This hijacking literature originates in accounts that treat the neural changes characteristic of addiction as a brain disease. This (...) paper provides a framework based on predictive processing accounts of self-awareness that integrates the hijacking and diachronic accounts. I discuss a hijacking account proposed to explain disruption of addiction following lesion to the anterior insula cortex. I show how insula activity contributes to the type of identification implicated in diachronic accounts and how deactivation of the anterior insula can disrupt addiction by alienating the subject from her addictive tendencies. This is consistent with neural evidence but also incorporates the personal level features of addiction that are opaque to neural level explanation. (shrink)

Users of psychedelic drugs often report that their sense of being a self or ‘I’ distinct from the rest of the world has diminished or altogether dissolved. Neuroscientific study of such ‘ego dissolution’ experiences offers a window onto the nature of self-awareness. We argue that ego dissolution is best explained by an account that explains self-awareness as resulting from the integrated functioning of hierarchical predictive models which posit the existence of a stable and unchanging entity to which representations are bound. (...) Combining recent work on the ‘integrative self' and the phenomenon of self-binding with predictive processing principles yields an explanation of ego dissolution according to which self-representation is a useful Cartesian fiction: an ultimately false representation of a simple and enduring substance to which attributes are bound which serves to integrate and unify cognitive processing across levels and domains. The self-model is not a mere narrative posit, as some have suggested; it has a more robust and ubiquitous cognitive function than that. But this does not mean, as others have claimed, that the self-model has the right attributes to qualify as a self. It performs some of the right kinds of functions, but it is not the right kind of entity. Ego dissolution experiences reveal that the self-model plays an important binding function in cognitive processing, but the self does not exist. (shrink)

A flood of new multidisciplinary work on the causes of depersonalization disorder provides a new way to think about the feeling that experiences “belong” to the self. In this paper I argue that this feeling, baptized “mineness” or “subjective presence” : 565–573, 2013) emerges from a multilevel interaction between emotional, affective and cognitive processing. The “self” to which experience is attributed is a predictive model made by the mind to explain the modulation of affect as the organism progresses through the (...) world. When the world no longer produces predicted affect the organism needs to explain this unpredicted absence of feeling. It is important to this account that cognition and perception are otherwise intact. Consequently the mind’s representation of the world and its emotionally salient properties are unchanged, leading the mind to predict a characteristic affective response. When that prediction is not fulfilled the organisms feels as if she is no longer present in experience. This is reported at the as feeling of depersonalization. (shrink)

Metaethics has recently been confronted by evidence from cognitive neuroscience that tacit emotional processes play an essential causal role in moral judgement. Most neuroscientists, and some metaethicists, take this evidence to vindicate a version of metaethical sentimentalism. In this paper we argue that the ‘dual process’ model of cognition that frames the discussion within and without philosophy does not do justice to an important constraint on any theory of deliberation and judgement. Namely, decision-making is the exercise of a capacity for (...) agency. Agency, in turn, requires a capacity to conceive of oneself as temporally extended: to inhabit, in both memory and imagination, an autobiographical past and future. To plan, to commit to plans, and to act in accordance with previous plans requires a diachronic self, able to transcend the present moment. While this fact about agency is central to much of moral philosophy (e.g. in discussions of autonomy and moral responsibility) it is opaque to the dual process framework and those meta-ethical accounts which situate themselves within this model of cognition. We show how this is the case and argue for an empirically adequate account of moral judgement which gives sufficient role to memory and imagination as cognitive prerequisites of agency. We reconsider the empirical evidence, provide an alternative, agentive, interpretation of key findings, and evaluate the consequences for metaethics. (shrink)

Evolutionary Psychology is based on the idea that the mind is a set of special purpose thinking devices or modules whose domain-specific structure is an adaptation to ancestral environments. The modular view of the mind is an uncontroversial description of the periphery of the mind, the input-output sensorimotor and affective subsystems. The novelty of EP is the claim that higher order cognitive processes also exhibit a modular structure. Autism is a primary case study here, interpreted as a developmental failure of (...) a module devoted to social intelligence or Theory of Mind. In this article I reappraise the arguments for innate modularity of TOM and argue that they fail. TOM ability is a consequence of domain general development scaffolded by early, innately specified, sensorimotor abilities. The alleged Modularity of TOM results from interpreting the outcome of developmental failures characteristic of autism at too high a level of cognitive abstraction. (shrink)

An elegant theory in cognitive neuropsychiatry explains the Capgras and Cotard delusions as resulting from the same type of anomalous phenomenal experience explained in different ways by different sufferers. ‘Although the Capgras and Cotard delusions are phenomenally distinct, we thus think that they represent patients’ attempts to make sense of fundamentally similar experiences’ (Young and Leafhead, 1996, p. 168). On the theory proposed by Young and Leafhead, the anomalous experience results from damage to an information processing subsystem which associates an (...) affect of ‘familiarity’ with overt recognition of faces, and, sometimes, scenes and objects. When the normal affect of familiarity is absent the subject experiences an unusual feeling of derealization or depersonalization. The Cotard and Capgras patients adopt different, delusional, explanations of this unusual qualitative state, for reasons to do with ‘attributional style’. It is part of this attribution hypothesis that delusional subjects, like normal people, interpret perceptual phenomena in the light of a set of background beliefs whose structure is a product of social/contextual influences and individual psychological dispositions. That structure predisposes people to reason in certain ways, to discount or reinterpret evidence and to favour certain hypoth-. (shrink)

Cognitive neuropsychiatry (CN) is the explanation of psychiatric disorder by the methods of cognitive neuropsychology. Within CN there are, broadly speaking, two approaches to delusion. The first uses a one-stage model, in which delusions are explained as rationalizations of anomalous experiences via reasoning strategies that are not, in themselves, abnormal. Two-stage models invoke additional hypotheses about abnormalities of reasoning. In this paper, I examine what appears to be a very strong argument, developed within CN, in favor of a two-stage explanation (...) of the difference in content between the Capgras and Cotard delusions. That explanation treats them as alternative rationalizations of essentially the same phenomenology. I show, however, that once we distinguish the phenomenology (and the neuroetiology), a one-stage model is adequate. In the final section I make some more general remarks on the one- and two-stage models. (shrink)

The case of pain asymbolia is a case study that provides evidence of the mechanisms underlying the relationship between bodily experience, affective experience, and self-awareness. On one account pain asymbolia is the result of an affective deficit. Sensory signals of bodily damage are not associated with characteristic negative affect. Cochrane endorses this account as part of his version of a “conceptual act” theory of affective experience. In contrast, I propose an active inference account of affect in general and pain asymbolia (...) in particular. In the active inference framework the self is inferred as the endogenous cause of bodily and affective experience in the process of organismic regulation. This preserves Cochranes ambition to ground affect in bodily regulation but avoids the problem for affective deficit accounts of asymbolia that cannot do justice to the neural correlates. (shrink)

Jennifer Radden has drawn attention to two features of delusion, ambivalence and subjectivity, which are problematic for theories of delusion that treat delusions as empirical beliefs. She argues for an ‘attitude’ theory of delusion. I argue that once the cognitive architecture of delusion formation is properly described the debate between doxastic and attitude theorists loses its edge. That architecture suggests that delusions are produced by activity in the ‘default mode network’ unsupervised by networks required for decontextualized processing. The cognitive properties (...) of these networks explain the features of delusion which generate the debate between doxastic and attitude theorists. (shrink)

Delusions are explanations of anomalous experiences. A theory of delusion requires an explanation of both the anomalous experience _and _the apparently irrational explanation generated by the delusional subject. Hence, we require a model of rational belief formation against which the belief formation of delusional subjects can be evaluated. _Method. _I first describe such a model, distinguishing procedural from pragmatic rationality. Procedural rationality is the use of rules or procedures, deductive or inductive, that produce an inferentially coherent set of propositions. Pragmatic (...) rationality is the use of procedural rationality _in context_. I then apply the distinction to the explanation of the Capgras and the Cotard delusions. I then argue that delusions are failures of pragmatic rationality. I examine the nature of these failures employing the distinction between performance and competence familiar from Chomskian linguistics. _Results. _This approach to the irrationality of delusions reconciles accounts in which the explanation of the anomalous experience exhausts the explanation of delusion, accounts that appeal to further deficits within the reasoning processes of delusional subjects, and accounts that argue that delusions are not beliefs at all. (Respectively, one-stage, two-stage, and expressive accounts.) _Conclusion. _In paradigm cases that concern cognitive neuropsychiatry the irrationality of delusional subjects should be thought of as a performance deficit in pragmatic rationality. (shrink)

Delusions are currently characterised as false beliefs produced by incorrect inference about external reality (DSM IV). This inferential conception has proved hard to link to explanations pitched at the level of neurobiology and neuroanatomy. This paper provides that link via a neurocomputational theory, based on evolutionary considerations, of the role of the prefrontal cortex in regulating offline cognition. When pathologically neuromodulated the prefrontal cortex produces hypersalient experiences which monopolise offline cognition. The result is characteristic psychotic experiences and patterns of thought. (...) This bottom-up account uses neural network theory to integrate recent theories of the role of dopamine in delusion with the insights of inferential accounts. It also provides a general model for evolutionary psychiatry which avoids theoretical problems imported from evolutionary psychology. (shrink)

Patients with damage to the ventromedial prefrontal cortex (VMPFC) are often described as having impaired ability for planning and decision making despite retaining intact capacities for explicit reasoning. The somatic marker hypothesis is that the VMPFC associates implicitly represented affective information with explicit representations of actions or outcomes. Consequently, when the VMPFC is damaged explicit reasoning is no longer scaffolded by affective information, leading to characteristic deficits. These deficits are exemplified in performance on the Iowa Gambling Task (IGT) in which (...) subjects with VMPFC perform significantly worse than neurotypicals in a task which requires them learn from rewarding and punishing experience to make decisions. The somatic marker theory adopts a canonical theory of emotion, in which emotions function as part of a valencing system, to explain the role of affective processes. The first part of the paper argues against this canonical account. The second part provides a different account of the role of the role of the VMPFC in decision-making which does not depend on the canonical account of emotion. Together the first and second parts of the paper provide the basis for a different interpretation of results on the Iowa Gambling Task (IGT). In fact the IGT may be probing a deficit in what has been called mental time travel: the ability to access and use information from previous experience and imaginatively rehearse future experiences as part of the process of deliberation. (shrink)

Recent work in cognitive neuroscience on the child's Theory of Mind (ToM) has pursued the idea that the ability to metarepresent mental states depends on a domain-specific cognitive subystem implemented in specific neural circuitry: a Theory of Mind Module. We argue that the interaction of several domain-general mechanisms and lower-level domain-specific mechanisms accounts for the flexibility and sophistication of behavior, which has been taken to be evidence for a domain-specific ToM module. This finding is of more general interest since it (...) suggests a parsimonious cognitive architecture can account for apparent domain specificity. We argue for such an architecture in two stages. First, on conceptual grounds, contrasting the case of language with ToM, and second, by showing that recent evidence in the form of fMRI and lesion studies supports the more parsimonious hypothesis. 1. Theory of Mind, Metarepresentation, and Modularity2. Developmental Components of ToM3. The Analogy with Modularity of Language4. Dissociations without Modules5. The Evidence from Neuroscience6. Conclusion. (shrink)

Standard accounts of delusion explain them as responses to experience. Cognitive models of feature binding in the face recognition systems explain how experiences of mismatch between feelings of "familiarity" and faces can arise. Similar mismatches arise in phenomena such as déjà and jamais vu in which places and scenes are mismatched to feelings of familiarity. These cognitive models also explain similarities between the phenomenology of these delusions and some dream states which involve mismatch between faces, feelings of familiarity and identities. (...) Given these similarities it makes sense to retain that aspect of the standard account in the face of revisionist arguments that feature binding anomalies which lead to delusions of misidentification are not consciously experienced. (shrink)

In this paper I consider a theory developed within cognitive neuropsychiatry to explain two delusions of misidentification, the Capgras and the Cotard delusions. These delusions are classified together with others in which the subject misidentifies persons, places or objects, including parts of her own body. Strictly speaking, the Cotard may not, at the level of content, be a delusion of misidentification, but I have described it as such because the theory I discuss treats it as sharing a causal and a (...) conceptual structure with the Capgras delusion. That theory, associated particularly with the work of Andy Young, raises a Wittgensteinian echo in its claim that, at the subpersonal, information-processing, level, perceptual recognition of familiar faces and scenes is laden with affect. Where affect is absent or distorted as a result of neurological damage the subject “feels” strange in the presence of familiar scenes or people. Thus Young and Leafhead in their discussion of the Cotard delusion: “What the patients often give as evidence of their nonexistence or death is that they don’t have proper feeling.”. (shrink)

Nativists about syntactic processing have argued that linguisticprocessing, understood as the implementation of a rule-basedcomputational architecture, is spared in Williams syndrome, (WMS)subjects – and hence that it provides evidence for a geneticallyspecified language module. This argument is bolstered by treatingSpecific Language Impairments (SLI) and WMS as a developmental doubledissociation which identifies a syntax module. Neuroconstructivists haveargued that the cognitive deficits of a developmental disorder cannot beadequately distinguished using the standard gross behavioural tests ofneuropsychology and that the linguistic abilities of the (...) WMS subject canbe equally well explained by a constructivist strategy of neurallearning in the individual, with linguisitic functions implemented in anassociationist architecture. The neuroconstructivist interpretation ofWMS undermines the hypothesis of a double dissociation between SLI andWMS, leaving unresolved the question of nativism about syntax. Theapparent linguistic virtuosity of WMS subjects is an artefact ofenhanced phonological processing, a fact which is easier to demonstratevia the associationist computational model embraced byneuroconstructivism. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Philosophy, Psychiatry, & Psychology 9.1 (2002) 65-72 [Access article in PDF] Multiple Paths to Delusion Philip Gerrans Response to Phillips JAMES PHILLIPS COMMENTS are summarized in four recommendations. Clarify the Relationship of the Cognitive Model to its Neuroscientific Base The cognitive approach postulates a cognitive entity whose information-processing properties explain a symptom or unify a set of symptoms. The key idea is that we can use a (...) model of normal cognitive functioning to explain a disorder in terms of failure of a component of the model. In the case under discussion, the symptom is the loss of affect, which is part of the clinical profile of both the Capgras and Cotard delusions. The body of neuropsychological data concerning links between recognitional and affective processes extends back at least to Charcot's patient M. X. whose affective responses to familiar situations were lost, together with his visual episodic memory. M. X described his phenomenology this way: A remarkable consequence of this loss of mental ability is, as I have said, the change in my personality and impressions. I am much less affected by sorrow or grief. I can tell you that, after losing one of my relatives with whom I was very close, I experienced a much less intense grief than if I had still been able to image the features of that relative, the stages of the illness he went through, or especially if I had been able to picture to myself [voir interieurement] the outward effect of this untimely death on the members of my family. (Young and van de Wal 1996) (It is interesting to note that M. X. retained insight into his condition and explained it in a lucid, rational way rather than forming a delusional belief. Initial evidence for a two-stage theory, one might have thought).Given convergent evidence that the limbic system is the basis of affective states, the hypothesis that the delusions under discussion are rationalizations of unusual affective experiences consequent on abnormal limbic function or loss of connection between limbic and other functions is an inference to the best explanation. The Young-Ellis model is a cognitive model that describes cognitive function at what Dennett calls the design level, intermediate between what Marr called the computational level and level of representation and algorithm. As such it implies only that the boxes and arrows are implemented neurally, but endorses no hypotheses about the nature of that implementation.It is correct of Phillips to observe that the crucial inference about the link between affective and cognitive function is grounded in a background theory of the relationship between cognitive models, clinical symptoms, and neurobiology. If Phillips' complaint is that the model cannot be sheeted home to a neurobiological substrate, [End Page 65] this is true. Implementation theories are thin on the ground in cognitive science because they would require a theory of biological computation that, despite partisan claims, is elusive. Nonetheless, information-processing models and partial implementation theories for specific functions such as perception, language, face recognition, and the affective systems do exist. The allusion to cognitive structure remains sound as long as it accounts for observable clinical and experimental data and makes verifiable predictions.The fact that the Young-Ellis model of face recognition can account for both normal function and a variety of forms of prosopagnosia together (under assumptions about the relation between belief and experience) with delusions of misidentification counts in its favor (Ellis 1998).Phillips objection to cognitive theories is stronger when we turn to models of belief and rationality. In the case of functions such as face recognition or language, there is a variety of convergent evidence, especially from deficit studies, to support a model of normal cognitive function. For example, we know that face recognition activates schemas concerning orientation, features, emotions, and gender because these components can be selectively damaged (Young 1998). However, we lack a model of normal human reasoning other than "folk theory" of belief-desire psychology. Cognitive theories of belief formation are often forced to use models derived from philosophy such as logic, probability theory, or decision theory, which are amenable to... (shrink)

In this paper I consider a theory developed within cognitive neuropsychiatry to explain two delusions of misidentification, the Capgras and the Cotard delusions. These delusions are classified together with others in which the subject misidentifies persons, places or objects, including parts of her own body. Strictly speaking, the Cotard may not, at the level of content, be a delusion of misidentification, but I have described it as such because the theory I discuss treats it as sharing a causal and a (...) conceptual structure with the Capgras delusion. That theory, associated particularly with the work of Andy Young, raises a Wittgensteinian echo in its claim that, at the subpersonal, information-processing, level, perceptual recognition of familiar faces and scenes is laden with affect. Where affect is absent or distorted as a result of neurological damage the subject “feels” strange in the presence of familiar scenes or people. Thus Young and Leafhead in their discussion of the Cotard delusion: “What the patients often give as evidence of their nonexistence or death is that they don’t have proper feeling.”. (shrink)

Once the notion of a precursive relationship between developmental stages is fully articulated in terms of the distinction between ‘role’ and ‘realiser’ states, it turns out that the ‘Theory of Mind’ literature operates with a notion of precursive relationships described at too high a level of abstraction to explain actual mechanisms of development. Furthermore, the tendency within that literature to explain precursive relationships in terms of role states with isomorphic linguistic/computational structures is misleading. Developmental relationships are more likely to exist (...) between states which play a similar normative role in the agents’s psychology than between states which can be described as sharing a similar computational architecture. (shrink)

Once the notion of a precursive relationship between developmental stages is fully articulated in terms of the distinction between ‘role’ and ‘realiser’ states, it turns out that the ‘Theory of Mind’ literature operates with a notion of precursive relationships described at too high a level of abstraction to explain actual mechanisms of development. Furthermore, the tendency within that literature to explain precursive relationships in terms of role states with isomorphic linguistic/computational structures is misleading. Developmental relationships are more likely to exist (...) between states which play a similar normative role in the agents’s psychology than between states which can be described as sharing a similar computational architecture. (shrink)

Imitation has been understood in different ways: as a cognitive adaptation subtended by genetically specified cognitive mechanisms; as an aspect of domain general human cognition. The second option has been advanced by Cecilia Heyes who treats imitation as an instance of associative learning. Her argument is part of a deflationary treatment of the “mirror neuron” phenomenon. I agree with Heyes about mirror neurons but argue that Kim Sterelny has provided the tools to provide a better account of the nature and (...) role of human imitation. What we call imitative learning is an instance of social learning. It has little to do with empathy, emotional contagion, or mind reading. (shrink)

Although depression is characterized as a mood disorder it turns out that, like moods in general, it cannot be explained independently of a theory of emotion. In this paper I outline one promising theory of emotion and show how it deals with the phenomenon of depressive mood. An important aspect of MAT is the role it assigns to peripheral information processing systems in setting up emotional responses. The operations of these systems are automatic and opaque to consciousness, but they represent (...) information about the significance of the environment for the subject, bias cognition and behaviour, and have a characteristic phenomenology. I show how understanding the nature of peripheral appraisal provides a principled way to link neurochemistry and mood via an information processing theory of the circuitry targeted by antidepressant treatment. The discussion is organized around Matthew Ratcliffe's distinction between pre-intentional and intentional feelings and suggests that the MAT might provide a way to link phenomenological and mechanistic accounts of feeling states characteristic of depression. (shrink)

© 2004 by The Johns Hopkins University Press.

Pierre Bourdieu has developed a philosophy of social science, grounded in the phenomenological tradition, which treats knowledge as a practical ability embodied in skilful behaviour, rather than an intellectual capacity for the representation and manipulation of propositional knowledge. He invokes Wittgenstein’s remarks on rule-following as one way of explicating the idea that knowledge is a skill. Bourdieu’s conception of tacit knowledge is a dispositional one, adopted to avoid a perceived dilemma for methodological individualism. That dilemma requires either the explanation of (...) regularities in social behaviour as the result of the tacit representation of procedural rules (‘legalism’) or the self-conscious representation of behavioural goals (‘voluntarism’) by individuals. After explaining the apparent dilemma, I then argue that Wittgenstein’s remarks on rule following actually undermine, rather than support, a dispositional solution. Nonetheless, the philosophy of social science can survive without a dispositional account of knowledge. Such a social science needs, firstly, to embrace one horn of the dilemma, voluntarism, provided that the relevant regularities can be explained as unintended consequences of agents’ self-represented intentions. Secondly, such a social science should treat theorists’ interpretations as unifying generalizations, not hypotheses about the acquisition of tacit knowledge. Finally, where appeal to cognitive psychology can distinguish otherwise equivalent theories in social science, social science should incorporate the data of cognitive psychology concerning tacit mental processes. (shrink)

Mental time travel is the ability to simulate alternative pasts and futures. It is often described as the ability to project a sense of self in the service of diachronic agency. It requires not only semantic representation but affective sampling of alternative futures. If people lose this ability for affective sampling their sense of self is diminished. They have less of a self to project hence are compromised as agents. If they cannot “feel the future” they cannot imaginatively inhabit it (...) and hence their agency is compromised. The extent of such losses and consequent impairments to moral agency can be matters of degree. (shrink)

The article states that in the "Esprit des Lois" Charles Louis de Secondat Montesquieu famously proposes a version of the doctrine of the separation of judicial, executive and legislative power as a way of protecting political liberty ("the opinion each has of his security"). Given the context in which he situates his arguments: an immense and theoretically opaque excursus which discusses almost everything known to political theory, anthropology and economics before his time, and essentially descriptive methodology, it is not easy (...) to discern a clear line of argument in support of the doctrine of the separation of powers. (shrink)

Mental time travel refers to the ability of an organism to project herself backward and forward in time, using episodic memory and imagination to simulate past and future experiences. The evolution of mental time travel gives humans a unique capacity for prospection: the ability to pre-experience the future. Discussions of mental time travel treat it as an instance of explicit prospection. We argue that implicit simulations of past and future experience can also be used as a way of gaining information (...) about the future to shape preferences and guide behaviour. (shrink)

The initial cause of Cotard delusion is pervasive dyshomeostasis (dysregulation of basic bodily function).This explanation draws on interoceptive active inference account of self‐representation. In this framework, the self is an hierarchical predictive model made by the brain to facilitate homeostatic regulation. The account I provide is an alternative to two factor accounts of the Cotard delusion that treat depersonalisation experience as the first factor in genesis of the Cotard delusion. I argue that depersonalisation experience and the Cotard delusion are produced (...) by different breakdowns in the process of self‐modelling. (shrink)

Individualism is not inconsistent with social interaction; it is required to explain it. Social exchanges, evidenced in gaze monitoring, social referencing, emotional responses, protodeclarative and imperative pointing, pretence, play, and conversation all play a role in development, but the nature of that role is opaque without an understanding of the cognitive mechanisms on which they depend.

This paper develops an account of the nature of imagination as a discrete mental process underpinned by a specialised neural and computational architecture. The account integrates evidence from cognitive neuroscience and developmental psychology with philosophical arguments about the nature of imagination. We situate the account against other philosophical accounts and apply it to the understanding of some puzzling phenomena: delusion, pretence and self-deception. We argue that many of the puzzling features of these phenomena arise because they are analysed with a (...) doxastic framework. When the role of imagination in these cases is properly understood these puzzles become more tractable. (shrink)

This paper develops an account of the nature of imagination as a discrete mental process underpinned by a specialised neural and computational architecture. The account integrates evidence from cognitive neuroscience and developmental psychology with philosophical arguments about the nature of imagination. We situate the account against other philosophical accounts and apply it to the understanding of some puzzling phenomena: delusion, pretence and self-deception. We argue that many of the puzzling features of these phenomena arise because they are analysed with a (...) doxastic framework. When the role of imagination in these cases is properly understood these puzzles become more tractable. (shrink)

Some evolutionary psychologists (EP) are strong nativists about Theory of Mind (TOM). They argue that the development of specialised cognitive competence required for TOM requires genetic specification of the developmental trajectory of a specialised cognitive system. EP arrives at this conclusion via conceptual arguments concerning the inadequacy of blank slate neuroconstructivism (strong neuroconstructivism) and empirical evidence from developmental and neuropsychology. I argue that the correct understanding of the conceptual argument applied to the case of TOM supports a moderate form of (...) neuroconstructivism which does not itself require genetic prespecification. In this respect there is no useful analogy with arguments which support stron nativism about linguistic competence. Understanding this debate has consequences for our understanding of modularity, autism, developmental disorders and nativism about high level cognition. (shrink)

Either genetically specified modular cognitive architecture for syntactic processing does not exist (neuroconstructivism), or there is a module but its development is so abnormal in Williams syndrome (WS) that no conclusion can be drawn about its normal architecture (moderate nativism). Radical nativism, which holds that WS is a case of intact syntax, is untenable. Specific Language Impairment and WS create a dilemma that radical nativism cannot accommodate.

Copyright © 2003 Elsevier Inc. All rights reserved.

A radical interpretation of the predictive coding approach suggests that the mind is “seamless” – that is, that cancellation of error signals can propagate smoothly from highest to lowest levels of the control hierarchy, dissolving a distinction between belief and perception. Delusions of alien control provide a test case. Close examination suggests that while they are evidence of predictive coding within the cortex, they are not evidence for the seamless interpretation.

Nativists about syntactic processing have argued that linguisticprocessing, understood as the implementation of a rule-basedcomputational architecture, is spared in Williams syndrome, (WMS)subjects – and hence that it provides evidence for a geneticallyspecified language module. This argument is bolstered by treatingSpecific Language Impairments (SLI) and WMS as a developmental doubledissociation which identifies a syntax module. Neuroconstructivists haveargued that the cognitive deficits of a developmental disorder cannot beadequately distinguished using the standard gross behavioural tests ofneuropsychology and that the linguistic abilities of the (...) WMS subject canbe equally well explained by a constructivist strategy of neurallearning in the individual, with linguisitic functions implemented in anassociationist architecture. The neuroconstructivist interpretation ofWMS undermines the hypothesis of a double dissociation between SLI andWMS, leaving unresolved the question of nativism about syntax. Theapparent linguistic virtuosity of WMS subjects is an artefact ofenhanced phonological processing, a fact which is easier to demonstratevia the associationist computational model embraced byneuroconstructivism. (shrink)

The definitive version is available at www.blackwell-synergy.com.