Cohen Kadosh, Tzelgov, and Henik [Cohen Kadosh, R., Tzelgov, J., and Henik, A. (2008). A synesthetic walk on the number line: The size effect. Cognition, 106, 548-557] present a new paradigm to probe properties of the mental number line. They describe two experiments which they argue to be inconsistent with the exact small number model proposed by Verguts, Fias, and Stevens [Verguts, T., Fias, W., Stevens, M. (2005). A model of exact small-number representation. Psychonomic Bulletin and Review, 12, (...) 66-80]. We discuss the data, assumptions, and conclusions of Cohen Kadosh et al.'s paper in relation to existing models of numerical cognition. (shrink)

Recent years have witnessed an enormous increase in behavioral and neuroimaging studies of numerical cognition. Particular interest has been devoted toward unraveling properties of the representational medium on which numbers are thought to be represented. We have argued that a correct inference concerning these properties requires distinguishing between different input modalities and different decision/output structures. To back up this claim, we have trained computational models with either symbolic or nonsymbolic input and with different task requirements, and showed that this allowed (...) for an integration of the existing data in a consistent manner. In later studies, predictions from the models were derived and tested with behavioral and neuroimaging methods. Here we present an integrative review of this work. (shrink)

A central controversy in cognitive science concerns the roles of rules versus similarity. To gain some leverage on this problem, we propose that rule‐ versus similarity‐based processes can be characterized as extremes in a multidimensional space that is composed of at least two dimensions: the number of features (Pothos, 2005) and the physical presence of features. The transition of similarity‐ to rule‐based processing is conceptualized as a transition in this space. To illustrate this, we show how a neural network model (...) uses input features (and in this sense produces similarity‐based responses) when it has a low learning rate or in the early phases of training, but it switches to using self‐generated, more abstract features (and in this sense produces rule‐based responses) when it has a higher learning rate or is in the later phases of training. Relations with categorization and the psychology of learning are pointed out. (shrink)

Why can’t we keep as many items as we want in working memory? It has long been debated whether this resource limitation is a bug or instead a feature. We propose that the resource limitation is a consequence of a useful feature. Specifically, we propose that flexible cognition requires time-based binding, and time-based binding necessarily limits the number of memoranda that can be stored simultaneously. Time-based binding is most naturally instantiated via neural oscillations, for which there exists ample experimental evidence. (...) We report simulations that illustrate this theory and that relate it to empirical data. We also compare the theory to several other resource theories. (shrink)

Comments on an article by Feigenson et. al.(see record 2004-18473-007). Reviewing behavioral and neural data in children, humans and animals, Feigenson and colleagues distinguish two core systems for number representation. One system represents number in an exact way but has a fixed upper limit; the other system has no size limit but represents number only approximately. Both systems are claimed to have a phylogenetic origin and to constitute the basis for ontogenetic development. As such, each system's representational principles are reflected (...) in adult human performance: subitizing is ascribed to the exact system whereas symbolic number processing is based on a mapping to the approximate system. This last assumption is motivated by the robust finding that symbolic numbers are more difficult to discriminate with increasing size (the 'size effect'). However, it remains to be shown how this mapping can reconcile the inherently exact nature of a symbolic system with signatures of approximate processing such as the size effect. (PsycINFO Database Record (c) 2005 APA, all rights reserved). (shrink)

Rips et al.'s arguments for rejecting basic number representations as a precursor of the natural number system are exclusively based on analog number coding. We argue that these arguments do not apply to place coding, a type of basic number representation that is not considered by Rips et al.

Comments on an article by Feigenson et. al.(see record 2004-18473-007). Reviewing behavioral and neural data in children, humans and animals, Feigenson and colleagues distinguish two core systems for number representation. One system represents number in an exact way but has a fixed upper limit; the other system has no size limit but represents number only approximately. Both systems are claimed to have a phylogenetic origin and to constitute the basis for ontogenetic development. As such, each system's representational principles are reflected (...) in adult human performance: subitizing is ascribed to the exact system whereas symbolic number processing is based on a mapping to the approximate system. This last assumption is motivated by the robust finding that symbolic numbers are more difficult to discriminate with increasing size (the 'size effect'). However, it remains to be shown how this mapping can reconcile the inherently exact nature of a symbolic system with signatures of approximate processing such as the size effect. (PsycINFO Database Record (c) 2005 APA, all rights reserved). (shrink)

We challenge the arguments of Cohen Kadosh & Walsh (CK&W) on two grounds. First, interactions between number form (e.g., notation, format, modality) and an experimental factor do not show that the notations/formats/modalities are processed separately. Second, we discuss evidence that numbers are coded abstractly, also when not required by task demands and processed unintentionally, thus challenging the authors' dual-code account.

The nature of unconscious information processing is a heavily debated issue in cognitive science, and neuroscience. Traditionally, it has been thought that unconscious cognitive processing is restricted to knowledge that is strongly prepared by conscious processes. In three experiments, we show that the task that is performed consciously can also be applied unconsciously to items outside the current task set. We found that a same–different judgment of two target stimuli was also performed on two subliminally presented prime stimuli. This was (...) true for target and prime stimuli from entirely different categories, as well as for prime and target stimuli at different levels of abstraction. These results reveal that unconscious processing can generalize more widely than previously accepted. (shrink)

The nature of unconscious information processing is a heavily debated issue in cognitive science , and neuroscience . Traditionally, it has been thought that unconscious cognitive processing is restricted to knowledge that is strongly prepared by conscious processes . In three experiments, we show that the task that is performed consciously can also be applied unconsciously to items outside the current task set. We found that a same–different judgment of two target stimuli was also performed on two subliminally presented prime (...) stimuli. This was true for target and prime stimuli from entirely different categories, as well as for prime and target stimuli at different levels of abstraction. These results reveal that unconscious processing can generalize more widely than previously accepted. (shrink)

Routine action sequences critically rely on neural mechanisms maintaining contextual and temporal information to disambiguate similar tasks (e.g. making coffee or tea). In this study we show the involvement of areas in temporal and lateral prefrontal cortices in maintaining temporal and contextual information for the execution of hierarchically‐organized action sequences.

An important approach to understand how the brain gives rise to consciousness is to probe the depth of unconscious processing, thus to define the key features that cause conscious awareness. Here, we investigate the possibility for subliminal stimuli to shape the context for unconscious processing. Context effects have generally been assumed to require consciousness. In the present experiment, unconscious context processing was investigated by looking at the impact of the context on the response activation elicited by a subliminal prime. We (...) compared the effects of the same subliminal prime on target processing when the prime was embedded in different unconscious contexts. Results showed that the same prime can evoke opposite responses depending on the unconscious context in which it is presented. Taken together, the results of this study show that context effects can be unconscious. (shrink)

Tyler conducted a longitudinal study of 1,575 Chicago inhabitants to determine why people obey the law. His findings show that the law is obeyed primarily because people believe in respecting legitimate authority, not because they fear punishment. The author concludes that lawmakers and law enforcers would do much better to make legal systems worthy of respect than to try to instill fear of punishment.

Collection of historical, theoretical and applied articles on the ethical considerations in the treatment of animals by human beings.

Deflationists believe that the question “What is truth?” should be answered not by means of a metaphysical inquiry into the nature of truth, but by figuring out what use we make of the concept of truth, and the word ‘true’, in practice. This article accepts this methodology, and it thereby rejects pluralism about truth that is driven by ontological considerations. However, it shows that there are practical considerations for a pluralism about truth, formulated at the level of use. The theory (...) expounded by this article states that truth is a dual-purpose tool; it can be used as a device for transferring justificatory burdens and, for select areas of discourse, it can also be used as a standard, a norm. This contrast in how truth is used introduces a bifurcation in our discourse that is reminiscent of metaphysical divides traced by more traditional versions of alethic pluralism. However, my pluralism “at the level of use” states that truth is plural solely at the level of use. It is unified at both the conceptual as well as the metaphysical level. At those levels, the theory takes its cue from deflationism. As such, this theory is offered as a midway point and as a potential way forward in the debate between deflationism and pluralism. (shrink)

John Rawls's influential theory of justice and public reason has often been thought to exclude religion from politics, out of fear of its illiberal and destabilizing potentials. It has therefore been criticized by defenders of religion for marginalizing and alienating the wealth of religious sensibilities, voices, and demands now present in contemporary liberal societies. In this anthology, established scholars of Rawls and the philosophy of religion reexamine and rearticulate the central tenets of Rawls's theory to show they in fact offer (...) sophisticated resources for accommodating and responding to religions in liberal political life. The chapters reassert the subtlety, openness, and flexibility of his sense of liberal "respect" and "consensus," revealing their inclusive implications for religious citizens. They also explore the means he proposes for accommodating nonliberal religions in liberal politics, developing his conception of "public reason" into a novel account of the possibilities for rational engagement between liberal and religious ideas. And they reevaluate Rawls's liberalism from the "transcendent" perspectives of religions themselves, critically considering its normative and political value, as well as its own "religious" character. _Rawls and Religion_ makes a unique and important contribution to contemporary debates over liberalism and its response to the proliferation of religions in contemporary political life. (shrink)

This paper examines the causal basis of our ability to attribute emotions to music, developing and synthesizing the existing arousal, resemblance and persona theories of musical expressivity to do so. The principal claim is that music hijacks the simulation mechanism of the brain, a mechanism which has evolved to detect one's own and other people's emotions.

He puts the issue of animal rights in historical context, drawing parallels between animal rights activism and other social movements, including the anti-slavery movement in the nineteenth century and the gay-lesbian struggle today. He also outlines the challenges to animal rights posed by deep ecology and ecofeminism to using animals for human purposes and addresses the ethical dilemma of the animal rights advocate whose employer uses animals for research."--BOOK JACKET.

For all its apparent debate bioethical discourse is in fact very narrow. The discussion that occurs is typically within limited parameters, rarely fundamental. Nor does it accommodate divergent perspectives with ease. The reason lies in its ideology and the political and economic perspectives that ideology promotes. Here the ideology of bioethics' fundamental axioms is critiqued as arbitrary and exclusive rather than necessary and inclusive. The result unpacks the ideological and political underpinnings of bioethical thinking and suggests new avenues for a (...) broader debate over fundamentals, and a different approach to bioethical debate. (shrink)

Canadian ethicists Jocelyn Downie and Udo Schuklenk seek to assess the effect of Canada’s decriminalisation of ‘medical assistance in dying’ ‘to inform Canada’s ongoing discussions and because other countries will confront the same questions if they contemplate changing their assisted dying law.’1 Their assessment focuses on two arguments earlier levied against expansion of these procedures. The first is that of a ‘slippery slope’ and the second is what they disingenuously call, ‘social determinants of health’. They conclude that, in both cases, (...) the effect of legislation permitting first limited and then expanded options for medical termination has been benign. The argument in this brief commentary is that the ‘slippery slope’ is clearly evident and support for those with chronic, progressive diagnoses a clear contributor to the ever increasing number of persons seeking MAID. Downie and Schuklenk first review the legal and legislative history of MAID. In Carter v Canada, the courts found …. (shrink)

Contemporary global politics poses urgent challenges – from humanitarian, migratory and environmental problems to economic, religious and military conflicts – that strain not only existing political systems and resources, but also the frameworks and concepts of political thinking. The standard cosmopolitan response is to invoke a sense of global community, governed by such principles as human rights or humanitarianism, free or fair trade, global equality, multiculturalism, or extra-national democracy. Yet, the contours, grounds and implications of such a global community remain (...) notoriously controversial, and it risks abstracting precisely from the particular and conflictual character of the challenges which global politics poses. The contributions to this collection undertake to develop a more fruitful cosmopolitan response to global political challenges, one that roots cosmopolitanism in the particularity and conflict of global politics itself. They argue that this ‘contestatory’ cosmopolitanism must be dialectical, agonistic and democratic: that is, its concepts and principles must be developed immanently and critically out of prevailing normative resources; they must reflect and acknowledge their antagonistic roots; and they must be the result of participatory and self-determining publics. In elaborating this alternative, the contributions also return to neglected cosmopolitan theorists like Hegel, Adorno, Arendt, Camus, Derrida, and Mouffe, and reconsider mainstream figures such as Kant and Habermas. This book was originally published as a special edition of _Critical Horizons. _. (shrink)

The Greek philosopher Protagoras, in the opening words of his lost book _Truth_, famously asserted, “Man is the measure of all things.” This contention—that humanity cannot know the world except by means of human aptitudes and abilities—has endured through the centuries in the work of diverse writers. In this bold and creative new investigation into the philosophical and intellectual parameters of the question of the animal, Tom Tyler explores a curious fact: in arguing or assuming that knowledge is characteristically human, (...) thinkers have time and again employed animals as examples, metaphors, and fables. From Heidegger’s lizard and Popper’s bees to Saussure’s ox and Freud’s wolves, Tyler points out, “we find a multitude of brutes and beasts crowding into the texts to which they are supposedly unwelcome.” Inspired by the medieval bestiaries, Tyler’s book features an assortment of “wild animals” —both real and imaginary—who appear in the works of philosophy as mere _ciferae_, or ciphers; each is there deployed as a placeholder, of no importance or worth in their own right. Examining the work of such figures as Bataille, Moore, Nietzsche, Kant, Whorf, Darwin, and Derrida, among others, Tyler identifies four ways in which these animals have been used and abused: as interchangeable ciphers; as instances of generalized animality; as anthropomorphic caricatures; and as repetitive stereotypes. Looking closer, however, he finds that these unruly beasts persistently and mischievously question the humanist assumptions of their would-be employers. Tyler ultimately challenges claims of human distinctiveness and superiority, which are so often represented by the supposedly unique and perfect human hand. Contrary to these claims, he contends that the hand is, in fact, a primitive organ, and one shared by many different creatures, thereby undercutting one of the foundations of anthropocentricism and opening up the possibility of nonhuman, or more-than-human, knowledge. (shrink)

Generally, online support groups are viewed as low-threshold services. We challenge this assumption with an investigation, based on Conversation Analysis and Membership Categorization Analysis, of contributions to an online support group on eating disorders. In this analysis we show how a new member interacts with existing members in order to display legitimacy for membership of the group. The group operates as a Community of Practice, since membership is organized as joined participation in a writing practice. It becomes clear that becoming (...) a member involves subscribing to normative requirements, centrally, displaying the insight that you are ill. In the case we focus on, this involves the requirement to leave pro-anorexia as a membership category behind. The novice does not yet seem ready to subscribe to this norm and thus the threshold for seeking support is heightened. (shrink)

Two rival paradigms permeate bioethics. One generally favors eugenics, euthanasia, assisted suicide and other methods for those with severely restricting physical and cognitive attributes. The other typically opposes these and favors instead ample support for "persons of difference" and their caring families or loved ones. In an attempt to understand the relation between these two paradigms, this article analyzes a publicly reported debate between proponents of both paradigms, bioethicist Peter Singer and lawyer Harriet McBryde Johnson. At issue, the article concludes, (...) are two distinct axiomatic sets of values resulting in not simply different styles of rhetoric but different vocabularies, in effect two different languages of ethics. (shrink)