Human cognition is unique in the way in which it relies on combinatorial (or compositional) structures. Language provides ample evidence for the existence of combinatorial structures, but they can also be found in visual cognition. To understand the neural basis of human cognition, it is therefore essential to understand how combinatorial structures can be instantiated in neural terms. In his recent book on the foundations of language, Jackendoff described four fundamental problems for a neural instantiation of combinatorial structures: the massiveness (...) of the binding problem, the problem of 2, the problem of variables, and the transformation of combinatorial structures from working memory to long-term memory. This paper aims to show that these problems can be solved by means of neural “blackboard” architectures. For this purpose, a neural blackboard architecture for sentence structure is presented. In this architecture, neural structures that encode for words are temporarily bound in a manner that preserves the structure of the sentence. It is shown that the architecture solves the four problems presented by Jackendoff. The ability of the architecture to instantiate sentence structures is illustrated with examples of sentence complexity observed in human language performance. Similarities exist between the architecture for sentence structure and blackboard architectures for combinatorial structures in visual cognition, derived from the structure of the visual cortex. These architectures are briefly discussed, together with an example of a combinatorial structure in which the blackboard architectures for language and vision are combined. In this way, the architecture for language is grounded in perception. Perspectives and potential developments of the architectures are discussed. Key Words: binding; blackboard architectures; combinatorial structure; compositionality; language; dynamic system; neurocognition; sentence complexity; sentence structure; working memory; variables; vision. (shrink)

The idea of representing words with cell assemblies is very appealing. However, syntactic sequences need to be represented as well. This cannot be done by using the activity levels of assemblies. Instead, structural relations and operations between assemblies are needed to achieve serial order in syntactic word strings.

Various issues concerning the neural blackboard architectures for combinatorial structures are discussed and clarified. They range from issues related to neural dynamics, the structure of the architectures for language and vision, and alternative architectures, to linguistic issues concerning the language architecture. Particular attention is given to the nature of true combinatorial structures and the way in which information can be retrieved from them in a productive and systematic manner.

We discuss a visual blackboard architecture that could be involved in imagery. In this architecture, networks that process identity information interact with networks that process location information, in a manner that produces structural (compositional) forms of representation. Architectures of this kind can be identified in the visual cortex, but perhaps also in prefrontal cortex areas related with working memory.

Scholars have demonstrated that common ways of performing charitable food aid in high-income countries maintain a powerless and alienated status of recipients. Aiming to protect the dignity of recipients, alternative forms of food aid have taken shape. However, an in-depth understanding of dignity in the context of food aid is missing. We undertook a scoping review to outline ways in which the dignity of recipients is violated or protected across various forms of food aid in high-income countries. By bringing scientific (...) results together through a social dignity lens, this paper offers a complex understanding of dignity in the context of food aid. The online database Scopus was used to identify scientific literature addressing food aid in relation to the dignity of recipients in high-income countries. The final selection included 37 articles representing eight forms of food aid in twelve countries. Across diverse forms of food aid, the selected studies report signs of (in)dignity concerning five dimensions: access to food aid, social interactions, the food, the physical space, and needs beyond food. Research gaps are found in the diversity of forms of food aid studied, and the identification of social standards important for recipients. Bringing the results of 37 articles together through a social dignity lens articulates the complex and plural ways in which the dignity of recipients is violated or protected. In addition, this review has demonstrated the usefulness of a social dignity lens to understand dignity across and in particular food aid contexts. (shrink)

We discuss the role of synchrony of activationin higher-level cognitive processes. Inparticular, we analyze the question of whethersynchrony of activation provides a mechanismfor compositional representation in neuralsystems. We will argue that synchrony ofactivation does not provide a mechanism forcompositional representation in neural systems.At face value, one can identify a level ofcompositional representation in the models thatintroduce synchrony of activation for thispurpose. But behavior in these models isalways produced by means conjunctiverepresentations in the form of coincidencedetectors. Therefore, models that rely onsynchrony (...) of activation lack the systematicityand productivity of true compositional systems.As a result, they cannot distinguish betweentype and token representations, which resultsin misrepresentations of spatial relations andpropositions. Furthermore, higher-levelcognitive processes will likely integrateinformation from widely distributed areas inthe brain, which puts severe restrictions onthe underlying neural dynamics if synchrony ofactivation is to play a role in theseprocesses. We will briefly discuss theserestrictions in the case of feature binding invisual cognition. (shrink)

_Abstract_: This article discusses the unity of cognitive science that seemed to emerge in the 1950s, based on the computational view of cognition. This unity would entail that there is a single set of mechanisms (i.e. algorithms) for all cognitive behavior, in particular at the level of productive human cognition as exemplified in language and reasoning. In turn, this would imply that theories in psychology, and cognitive science in general, would consist of algorithms based on symbol manipulation as found in (...) digital computing. However, a number of developments in recent decades cast doubt on this unity of cognitive science. Also, there are fundamental problems with the claim that cognitive theories are just algorithms. This article discusses some of these problems and suggests that, instead of unified theories of cognition, specific mechanisms for cognitive behavior in specific cognitive domains could be needed, with architectures that are tailor-made for specific forms of implementation. A sketch of such an architecture for language is presented, based on modifiable connection paths in small-world like network structures. _Keywords_: Connection Paths; Control of Activation; Small-world Networks; Symbol Manipulation; Unity of Cognition _Dalle teoria unificate della cognizione a quelle specifiche_ _Riassunto_: Questo articolo discute l’unità della scienza cognitiva che sembrava emergere negli Anni ’50 e che era basata su una concezione computazionale della cognizione. Questa unità prevedeva l’esistenza di un singolo insieme di meccanismi (algoritmi) per tutti i comportamenti cognitivi, in particolare al livello della cognizione umana produttiva come, per esempio, linguaggio e ragionamento. A sua volta ciò implicava che le teorie psicologiche e, più in generale della scienza cognitiva, prevedessero algoritmi basati sulla manipolazione di simboli come nella computazione digitale. E, tuttavia, diversi sviluppi degli ultimi decenni hanno messo in dubbio questa unità della scienza cognitiva. Affermare che le teorie cognitive sarebbero solo algoritmi presenta problemi di fondo. Questo articolo discute alcuni di questi problemi, suggerendo che, invece di teorie della cognizione unificata, si potrebbe aver bisogno di meccanismi specifici per il comportamento cognitivo in specifici domini cognitivi, con architetture ritagliate per specifiche forme di implementazione. Questo articolo presenta uno schizzo di una simile architettura per il linguaggio, basata su vie di connessione modificabili in piccoli mondi come le strutture di reti. _Parole chiave_: Vie di connessione; Controllo dell’attivazione; Reti di piccoli mondi; Manipolazione di simboli; Unità della cognizione. (shrink)

Cognitive agents are dynamical systems but not quantitative dynamical systems. Quantitative systems are forms of analogue computation, which is physically too unreliable as a basis for cognition. Instead, cognitive agents are dynamical systems that implement discrete forms of computation. Only such a synthesis of discrete computation and dynamical systems can provide the mathematical basis for modeling cognitive behavior.

Van Vugt, van der Velde, and collaborators show how cognitive architectures can implement verbal theories of psychiatric problems. They show how one theory of depressive rumination can be implemented in the ACT‐R cognitive architecture by changing the contents of its simulated memory. These manipulations of memory habits lead the model to show impairments in a sustained attention task‐‐a plausible impairment given that people who suffer from depression have concentration complaints.

The parameters governing our behavior are in constant flux. Accurately capturing these dynamics in cognitive models poses a challenge to modelers. Here, we demonstrate a mapping of ACT-R's declarative memory onto the linear ballistic accumulator (LBA), a mathematical model describing a competition between evidence accumulation processes. We show that this mapping provides a method for inferring individual ACT-R parameters without requiring the modeler to build and fit an entire ACT-R model. Existing parameter estimation methods for the LBA can be used, (...) instead of the computationally expensive parameter sweeps that are traditionally done. We conduct a parameter recovery study to confirm that the LBA can recover ACT-R parameters from simulated data. Then, as a proof of concept, we use the LBA to estimate ACT-R parameters from an empirical dataset. The resulting parameter estimates provide a cognitively meaningful explanation for observed differences in behavior over time and between individuals. In addition, we find that the mapping between ACT-R and LBA lends a more concrete interpretation to ACT-R's latency factor parameter, namely as a measure of response caution. This work contributes to a growing movement towards integrating formal modeling approaches in cognitive science. (shrink)

The cell assembly is an important concept for cognitive psychology. Cognitive processing will to a large extent depend on the relations that can exist between different assemblies. A potential relation between assemblies can already be seen in the occurrence of (classical) conditioning. However, the resulting associations between assemblies only produce behavioristic processing or so-called regular computation. Higher-level cognitive abilities most likely result from nonregular computation. I discuss the possibility of this form of computation in terms of cell assemblies.

Die Buchreihe Linguistische Arbeiten hat mit über 500 Bänden zur linguistischen Theoriebildung der letzten Jahrzehnte in Deutschland und international wesentlich beigetragen. Die Reihe wird auch weiterhin neue Impulse für die Forschung setzen und die zentrale Einsicht der Sprachwissenschaft präsentieren, dass Fortschritt in der Erforschung der menschlichen Sprachen nur durch die enge Verbindung von empirischen und theoretischen Analysen sowohl diachron wie synchron möglich ist. Daher laden wir hochwertige linguistische Arbeiten aus allen zentralen Teilgebieten der allgemeinen und einzelsprachlichen Linguistik ein, die aktuelle (...) Fragestellungen bearbeiten, neue Daten diskutieren und die Theorieentwicklung vorantreiben. (shrink)

Name der Zeitschrift: Cognitive Linguistics Jahrgang: 27 Heft: 1 Seiten: 137-145.

Epistemic logic has grown from its philosophical beginnings to find diverse applications in computer science, and as a means of reasoning about the knowledge and belief of agents. This book provides a broad introduction to the subject, along with many exercises and their solutions. The authors begin by presenting the necessary apparatus from mathematics and logic, including Kripke semantics and the well-known modal logics K, T, S4 and S5. Then they turn to applications in the context of distributed systems and (...) artificial intelligence. These include the notions of common knowledge, distributed knowledge, explicit and implicit belief, the interplays between knowledge and time, and knowledge and action, as well as a graded (or numerical) variant of the epistemic operators. The authors also discuss extensively the problem of logical omniscience. They cover Halpern & Moses' theory of honest formulas, and they make a digression into the realm of nonmonotonic reasoning and preferential entailment. They discuss Moore's autoepistemic logic, together with Levesque's related logic of "all I know". Furthermore, they show how one can base default and counterfactual reasoning on epistemic logic. Graduate students in philosophy or in computer science, especially those with an interest in AI, will find this book useful. (shrink)

Two decades of research on euthanasia in the Netherlands have resulted into clear insights in the frequency and characteristics of euthanasia and other medical end-of-life decisions in the Netherlands. These empirical studies have contributed to the quality of the public debate, and to the regulating and public control of euthanasia and physician-assisted suicide. No slippery slope seems to have occurred. Physicians seem to adhere to the criteria for due care in the large majority of cases. Further, it has been shown (...) that the majority of physicians think that the euthanasia Act has improved their legal certainty and contributes to the carefulness of life-terminating acts. In 2005, eighty percent of the euthanasia cases were reported to the review committees. Thus, the transparency envisaged by the Act still does not extend to all cases. Unreported cases almost all involve the use of opioids, and are not considered to be euthanasia by physicians. More education and debate is needed to disentangle in these situations which acts should be regarded as euthanasia and which should not. Medical end-of-life decision-making is a crucial part of end-of-life care. It should therefore be given continuous attention in health care policy and medical training. Systematic periodic research is crucial for enhancing our understanding of end-of-life care in modern medicine, in which the pursuit of a good quality of dying is nowadays widely recognized as an important goal, in addition to the traditional goals such as curing diseases and prolonging life. (shrink)

It is common to posit a clear opposition between the values served by property systems and the value of the environment. To give the environment its due, this view holds, the role of private property needs to be limited. Support for this has been said to be found in Locke’s famous ‘enough and as good’ proviso. This article shows that this opposition is mistaken, and corrects the implied reading of Locke’s proviso. In reality, there is no opposition between property and (...) the environment. This is shown using Locke’s theory of appropriation, as well as the real-life case of instream water appropriation. (shrink)

Despite its uniform appearance, the cerebellar cortex is highly heterogeneous in terms of structure, genetics and physiology. Purkinje cells (PCs), the principal and sole output neurons of the cerebellar cortex, can be categorized into multiple populations that differentially express molecular markers and display distinctive physiological features. Such features include action potential rate, but also their propensity for synaptic and intrinsic plasticity. However, the precise molecular and genetic factors that correlate with the differential physiological properties of PCs remain elusive. In this (...) article, we provide a detailed overview of the cellular mechanisms that regulate PC activity and plasticity. We further perform a pathway analysis to highlight how molecular characteristics of specific PC populations may influence their physiology and plasticity mechanisms. (shrink)

While having a breast reconstruction, women have certain expectations about their future breasted bodies. The aim of this paper is to describe and analyze these expectations in the process of reconstruction. By applying a qualitative, phenomenological study within a longitudinal research design, this paper acknowledges the temporarily complex, contextualized, embodied, and subjective nature of the phenomenon of expectations. The analysis identified expectations regarding three different aspects of women’s embodiment: their gazed body, their capable/practical body, and their felt body. After reconstruction, (...) these women try to reconfigure—adjust, level or retrospectively rewrite—their expectations. Further, some women face what apparently arrives totally unexpected, namely a strange feeling breast or a failed reconstruction. The development of these women’s expectations can be understood as an active, continuously evolving, difficult and sometimes impossible dynamic of expecting the surprise that is a breast reconstruction. Within this dynamic, women formulate and reconfigure—by definition—unrealistic expectations and validate and try to achieve unexpected futures. We suggest that medical professionals can facilitate this dynamic in various ways. (shrink)

State legitimacy is often said to have two aspects: an internal and an external one. Internally, a legitimate state has the right to rule over its subjects. Externally, it has a right that outsiders not interfere with its domestic governance. But what is the relation between these two aspects? In this paper, I defend a conception of legitimacy according to which these two aspects are related in an importantly asymmetrical manner. In particular, a legitimate state’s external right to rule affords (...) it protections that include and go beyond what its internal right to rule enables it to do. This asymmetrical view, I argue, is preferable to its two main rivals: the view that a state’s internal and external legitimacy are separate issues, and the view that internal and external legitimacy are mirroring. (shrink)

ABSTRACT The traditional view holds that political philosophy should aim at the truth. By contrast, Avner de Shalit argues that political philosophers should do something different. According to him, they should work in direct consultation with “the people” in order to think through their theories about political institutions. This article defends the traditional aim of truth-seeking and shows the mistakes in De Shalit’s alternative approach.

This paper argues, first, that biological evolution can be both random and divinely guided at the same time. Next it discusses the idea that the claim that evolution is unguided is not part of the science of evolution, and defends it against a number of objections.

In the interview in this article, Randall Collins discusses various aspects of his oeuvre. First, he considers why interaction rituals (IRs) in religion are special emotional transformers. This is followed by a discussion of IRs in the digital age and the symbolic and economic power that is required to orchestrate IRs in politics and revolutions. Then comes a discussion of social scientific research into violence, in the past and more recently. The interview continues with a reflection on the notion of (...) attention space, a concept which Collins has applied in analyses of violent interactions and the intellectual struggles between philosophers. Finally, the article considers the state of the art of sociology and its future prospects, evaluating its potential for rapid discovery and its position on the abstraction-reflexivity continuum. As the interview demonstrates Collins’s insightful sociological craftsmanship, it provides social scientists with a strong and optimistic lead in how to do social theory. (shrink)

This paper examines the increasingly popular view that new insights from the science of subjective well-being (SSWB) should play a prominent role in the determination of public policy. Though there are instrumental reasons for caring about societal happiness too, these political aspirations of the SSWB appear to be mostly intrinsically motivated. As the intrinsic value of happiness is endorsed across the political happiness as a fitting response to the state of the world, authenticity, and merit – it is shown that (...) different views of the conditionality of the intrinsic value of happiness have widely diverging policy implications, which greatly undermines the political aspirations of the SSWB. (shrink)