Route memory is frequently assessed in virtual environments. These environments can be presented in a fully controlled manner and are easy to use. Yet they lack the physical involvement that participants have when navigating real environments. For some aspects of route memory this may result in reduced performance in virtual environments. We assessed route memory performance in four different environments: real, virtual, virtual with directional information (compass), and hybrid. In the hybrid environment, participants walked the route outside on an open (...) field, while all route information (i.e., path, landmarks) was shown simultaneously on a handheld tablet computer. Results indicate that performance in the real life environment was better than in the virtual conditions for tasks relying on survey knowledge, like pointing to start and end point, and map drawing. Performance in the hybrid condition however, hardly differed from real life performance. Performance in the virtual environment did not benefit from directional information. Given these findings, the hybrid condition may offer the best of both worlds: the performance level is comparable to that of real life for route memory, yet it offers full control of visual input during route learning. (shrink)

Spatial relations are central to geometrical thinking. With respect to the classical elementary geometry of Euclid’s Elements, a distinction between co-exact, or qualitative, and exact, or metric, spatial relations has recently been advanced as fundamental. We tested the universality of intuitions of these relations in a group of Senegalese and Dutch participants. Participants performed an odd-one-out task with stimuli that in all but one case display a particular spatial relation between geometric objects. As the exact/co-exact distinction is closely related to (...) Kosslyn’s categorical/coordinate distinction, a set of stimuli for testing all four types was used. Results suggest that intuitions of all spatial relations tested are universal. Yet, culture has an important effect on performance: Dutch participants outperformed Senegalese participants and stimulus layouts affect the categorical and coordinate processing in different ways for the two groups. Differences in level of education within the Senegalese participants did not affect performance. (shrink)

With technological possibilities in healthcare steadily increasing, more tools for digital cognitive rehabilitation become available. Acceptance of such technological advances is crucial for successful implementation. Therefore, we examined technology acceptance specifically for this form of rehabilitation in a sample of healthcare providers involved in cognitive rehabilitation. An adjusted version of the Technology Acceptance Model questionnaire was used, including the subscales for perceived usefulness, perceived ease of use, subjective norm, and intention to use, which all contribute to actual use of a (...) specific technology. Results indicate a generally favorable attitude toward the use of digital cognitive rehabilitation and positive responses toward the TAM constructs. Only for subjective norm, a neutral mean response was found, indicating that this could pose a potential obstacle toward implementation. Potential differences between subgroups of different age, gender, and professional background were assessed. Age and gender did not affect the attitude toward digital cognitive rehabilitation. Occupational therapists showed lower scores than healthcare psychologists and physiatrists with regard to perceived usefulness, possibly linked to a difference in operational and managerial tasks. The findings of his study stimulate further implementation of digital cognitive rehabilitation, where the role of subjective norms should be specifically considered. (shrink)

In language evolution research, the use of computational and experimental methods to investigate the emergence of structure in language is exploding. In this review, we look exclusively at work exploring the emergence of structure in speech, on both a categorical level, and a combinatorial level. We show that computational and experimental methods for investigating population-level processes can be effectively used to explore and measure the effects of learning, communication and transmission on the emergence of structure in speech. We also look (...) at work on child language acquisition as a tool for generating and validating hypotheses for the emergence of speech categories. Further, we review the effects of noise, iconicity and production effects. (shrink)

Background Self-binding directives (SBDs) are psychiatric advance directives that include the possibility for service users to consent in advance to compulsory care in future mental health crises. Legal provisions for SBDs exist in the Netherlands since 2008 and were updated in 2020. While ethicists and legal scholars have identified several benefits and risks of SBDs, few data on stakeholder perspectives on SBDs are available. Aims The aim of the study was to identify opportunities and challenges of SBDs perceived by stakeholders (...) who have personal or professional experience with legally enforceable SBDs. Methods Data collection was carried out in the Netherlands from February 2020 to October 2021 by means of semi-structured interviews. Participants were selected through purposive sampling and snowball methods. Interviews were conducted with mental health service users (n = 7), professionals (n = 13), and an expert on SBD policy (n = 1), resulting in a total number of 21 interviews. The data were analyzed thematically. Results Perceived benefits of SBDs included increased autonomy, improvement of the therapeutic relationship, possibility of early intervention and prevention of harm, prevention of compulsory care, reduction of the duration of compulsory care and recovery, mitigation of negative experiences around compulsory care, and guidance for professionals in providing compulsory care. Perceived risks included infeasibility of SBD instructions, difficulty in decision-making around SBD activation, limited accessibility of SBDs, disappointment of service users due to non-compliance with SBDs, and limited evaluation and updating of SBD content. Barriers to SBD completion included lack of knowledge of SBDs among professionals, lack of motivation or insight among service users, and lack of professional support for SBD completion. Facilitators of SBD completion and activation included support for SBD completion, involvement of relatives and peer experts, specification of SBD content, and evaluation of compulsory care and SBD content. The new legal framework was regarded as having both positive and negative effects on SBD implementation. Conclusions Stakeholders who have personal or professional experience with legally enforceable SBDs perceive SBDs as having important benefits and tend not to articulate the fundamental ethical concerns about SBDs which can be found in the ethics and legal literature. Instead, they perceive ethical and practical challenges that can be addressed through the implementation of suitable safeguards. (shrink)

Purpose – The purpose of this paper is to develop a novel approach for the ethical analysis of data collected from an online file-sharing site known as The PirateBay. Since the creation of Napster back in the late 1990s for the sharing and distribution of MP3 files across the Internet, the entertainment industry has struggled to deal with the regulation of information sharing at large. Added to the ethical questions of censorship and distributive justice are questions related to the use (...) of data collected from such file-sharing sites for research purposes. Design/methodology/approach – The approach is based on previous work analysing the use of data from online social networking sites and involves value analysis of the collection of data throughout the data’s various life cycles. Findings – This paper highlights the difficulties faced when attempting to apply a deontological or utilitarian approach to cases like the one used here. With this in mind, the authors point to a virtue ethics approach as a way to address ethical issues related to data sharing in the face of ever-changing data gathering and sharing practices. Practical implications – This work is intended to provide a concrete approach for ethical data sharing practices in the domain of Internet security research. Originality/value – The approach presented in this paper is a novel approach combining the insights from: the embedded values concept, value-sensitive design and the approach of the embedded ethicist. (shrink)

The cognitive processing of spatial relations in Euclidean diagrams is central to the diagram-based geometric practice of Euclid's Elements. In this study, we investigate this processing through two dichotomies among spatial relations—metric vs topological and exact vs co-exact—introduced by Manders in his seminal epistemological analysis of Euclid's geometric practice. To this end, we carried out a two-part experiment where participants were asked to judge spatial relations in Euclidean diagrams in a visual half field task design. In the first part, we (...) tested whether the processing of metric vs topological relations yielded the same hemispheric specialization as the processing of coordinate vs categorical relations. In the second part, we investigated the specific performance patterns for the processing of five pairs of exact/co-exact relations, where stimuli for the co-exact relations were divided into three categories depending on their distance from the exact case. Regarding the processing of metric vs topological relations, hemispheric differences were found for only a few of the stimuli used, which may indicate that other processing mechanisms might be at play. Regarding the processing of exact vs co-exact relations, results show that the level of agreement among participants in judging co-exact relations decreases with the distance from the exact case, and this for the five pairs of exact/co-exact relations tested. The philosophical implications of these empirical findings for the epistemological analysis of Euclid's diagram-based geometric practice are spelled out and discussed. (shrink)

We identify two aspects of the problem of maintaining perceptual stability despite an observer's eye movements. The first, visual direction constancy, is the (egocentric) stability of apparent positions of objects in the visual world relative to the perceiver. The second, visual position constancy, is the (exocentric) stability of positions of objects relative to each other. We analyze the constancy of visual direction despite saccadic eye movements.Three information sources have been proposed to enable the visual system to achieve stability: the structure (...) of the visual field, proprioceptive inflow, and a copy of neural efference or outflow to the extraocular muscles. None of these sources by itself provides adequate information to achieve visual direction constancy; present evidence indicates that all three are used.Our final question concerns how information processing operations result in a stable world. The three traditionally suggested means have been elimination, translation, or evaluation. All are rejected. From a review of the physiological and psychological evidence we conclude that no subtraction, compensation, or evaluation need take place. The problem for which these solutions were developed turns out to be a false one. We propose a “calibration” solution: correct spatiotopic positions are calculated anew for each fixation. Inflow, outflow, and retinal sources are used in this calculation: saccadic suppression of displacement bridges the errors between these sources and the actual extent of movement. (shrink)

Hoewel in de laatste jaren sterk de nadruk is gelegd op de “autonomie” van het geschrevene ten opzichte van de schrijver en diens belevingswereld, wil deze auteur graag beginnen met een persoonlijke betuiging van erkentelijkheid. Een mens is toch wel zodanig verbonden met een geesteskind dat hij lang bij zich gedragen heeft, dat hij de aandacht en de grondigheid die uit de hiervoor geplaatste reacties spreekt, alleen maar in hoge mate kan waarderen. Hij heeft ze ervaren als toonbeelden van “ontmoeting”. (...) De verschillen tussen de drie reacties laten nog eens zien dat ontmoeting verre van monotoon is. Juist ook die verschillen vond ik leerzaam. Bij de opzet van mijn repliek wil ik aan de diversiteit zo goed mogelijk recht doen door de reacties stuk voor stuk te bespreken. Af en toe zal een “intertekstuele” opmerking wenselijk of onvermijdelijk zijn. Overigens vrees ik dat binnen het bestek van deze repliek niet voldoende ingegaan kan worden op alle vragen en tegenwerpingen. (shrink)

Politiek gaat over het verenigen van gemeenschappelijke en conflicterende belangen in bindende collectieve besluitvorming op een wijze die door winnaars en verliezers kan worden aanvaard. In dit artikel baseer ik mij op het politiek gezaghebbende duurzaamheidsconcept van de Brundtlandcommissie in Our Common Future: ‘Duurzame ontwikkeling is ontwikkeling die tegemoetkomt aan de behoeften in het heden zonder de mogelijkheid van toekomstige generaties om te voorzien in hun eigen behoeften in de weg te staan’ . Dan blijkt direct dat het vinden (...) van principes voor een duurzame politiek lastig is, want het gaat hier om een morele eis rekening te houden met de belangen van mensen in komende generaties die nu nog geen deel uitmaken van een politieke gemeenschap. (shrink)

Door de Franse filosoof Maurice Blanchot geïnspireerd pleidooi voor de ritualisering van het denken.

Vrijheid van kunst betekent dat de maker vrij is om de kunst te maken die hij wil. Hij is degene die bepaalt wat hij maakt en hoe hij het gemaakte naar buiten brengt. Het publiek kan verschillend op de naar buiten gebrachte kunst reageren en kan eventueel de kunstenaar vragen verantwoording af te leggen. Een kunstenaar kan op dit verzoek ingaan, al hoeft dat in verreweg de meeste gevallen niet. Het afleggen van verantwoording beperkt de vrijheid van kunst echter niet. (...) Zij staat voor de dialoog die door kunstenaars zelf in bepaalde gevallen wordt gezocht, met name als het gaat om geëngageerde kunst. (shrink)

This paper analyzes the historical context and systematic importance of Kant's hypothetical use of reason. It does so by investigating the role of hypotheses in Kant's philosophy of science. We first situate Kant’s account of hypotheses in the context of eighteenth-century German philosophy of science, focusing on the works of Wolff, Meier, and Crusius. We contrast different conceptions of hypotheses of these authors and elucidate the different theories of probability informing them. We then adopt a more systematic perspective to discuss (...) Kant's idea that scientific hypotheses must articulate real possibilities. We argue that Kant's views on the intelligibility of scientific hypotheses constitute a valuable perspective on scientific understanding and the constraints it imposes on scientific rationality. (shrink)

Abstract‘Social inclusion’ is the leading ideal in services and care for people with intellectual disabilities in most countries in the Global North. ‘Social inclusion’ can refer simply to full equal rights, but more often it is taken to mean something like ‘community participation’. This narrow version of social inclusion has become so ingrained that it virtually goes unchallenged. The presumption appears to be that there is a clear moral consensus that this narrow understanding of social inclusion is good. However, that (...) moral consensus is not clear in the case of people with profound intellectual and/or multiple disabilities (PIMD), who are not able to express their needs and preferences verbally. Moreover, social inclusion has proven to be difficult to conceptualize and implement for people with PIMD. Therefore, it becomes imperative to ask about the ethical rationale of the narrow understanding of social inclusion. For what reasons do we think social inclusion is good? And do those reasons also apply for people with PIMD? This article addresses these questions by providing an ethical analysis of the ideal of social inclusion for people with PIMD. It discusses four ethical arguments for social inclusion and probes their relevance for people with PIMD. The article argues that none of these arguments fully convince of the value of the narrow understanding of social inclusion for people with PIMD. It ends with advocating for an ethical space for imagining a good life for people with PIMD otherwise. (shrink)

Nelson Goodman’s attempt to analyse the expressiveness of artworks in semantic terms has been widely criticised. In this paper I try to show how the use of an adapted version of his concept of exemplification, as proposed by Mark Textor, can help to alleviate the worst problems with his theory of expression. More particularly I argue that the recognition of an intention, which is central to Textor’s account of exemplification, is also fundamental to our understanding of expressiveness in art. Moreover (...) I propose that the recognition of this intention depends on our interpretation of the artwork – an insight Goodman tried to capture with his assertion that our attributions of expressive properties to artworks function metaphorically. The realisation of the context-dependence of our expressive judgements about art and, hence, of the central role interpretation plays in these judgements, I contend, counts in favour of theories of expression like Goodman’s that focus on semantic concerns. (shrink)

The Russian invasion of Ukraine on February 24, 2022, has already caused large amounts of greenhouse gas (GHG) emissions and will continue to do so for manyyears after hostilities have ceased mainly because of the emissions linked to the rebuilding of destroyed or damaged housing, public buildings, infrastructure, factories, and the like. My aim in this paper is to discuss how in a time of climate emergency such emissions of war should impact the political morality of states initiating, continuing, and (...) ending war (through a just and enduring peace) as understood by just war theory (JWT). My point of departure is a study by Lennard de Klerk and six co-authors detailing the emissions of the first year of the Russo-Ukrainian war. (shrink)

Amsterdam University Press is a leading publisher of academic books, journals and textbooks in the Humanities and Social Sciences. Our aim is to make current research available to scholars, students, innovators, and the general public. AUP stands for scholarly excellence, global presence, and engagement with the international academic community.

Over the past decades, both wild and domesticated insect pollinators are in dramatic decline, which puts at stake the existence of species, ecosystem resilience and global food security. Globally, 87 of major food crops depend on animal pollination. Together these account for 35 % of the world food production volume. Pollinator mediated crops are indispensable for essential micronutrients in the human diet. Many ornamental plants as well as crops for fibre, fodder, biofuels, timber and phytopharmaceuticals also depend on insect pollinators. (...) This article aims to map the current situation of pollinators worldwide, with a focus on the critical role of pollinators in the human food chain and ecosystem sustainability, their intrinsic and extrinsic value, as well as the causes of their declines and the interventions needed to conserve them, in order to develop an argument for the importance of conserving and restoring pollinator populations and diversity. The present pollinator crisis threatens global and local food security, can worsen the problems of hidden hunger, erodes ecosystem resilience, and can destabilise ecosystems that form our life support system. An integrated approach that simultaneously addresses the key drivers is needed. This includes creation and restoration of floral and nesting resources, a global phase out of prophylactic use of neonicotinoids and fipronil, improvement of test protocols in authorisation of agrochemicals, and restoration and maintenance of independence in regulatory science. The authors argue that an international treaty for global pollinator stewardship and pollinator ecosystem restoration should be initiated in order to systemically counteract the current crisis. (shrink)

This article investigates how companies make sense of CSR. It is based on an explorative comparative case study of 18 companies in the Netherlands using background information, interviews and annual reports. Initially, the sensemaking process of CSR is guided and coordinated by change agents who are specifically appointed to explore the implementation of CSR in their company. These change agents initiate the CSR process within their own organisations. The meaning they develop stems from their personal and organisational values and frames (...) of reference. By attuning the vocabulary of CSR to the language of their colleagues, they aim to gain support for this undertaking in their organisation. This sensemaking procedure can be divided into pragmatic, external, procedural, policy‐oriented and value‐driven processes. The capability of an organisation to embed CSR is the result of trial and error, personal preferences and the use of language by the change agent that fits the (dynamic) situation at hand. Thus, each organisation needs a tailor‐made approach to implement CSR successfully. (shrink)

To understand pre-Fregean theories of judgment and proposition, such as those found in Locke and the Port-Royal logic, it is important to distinguish between propositions in the modern sense and propositions in the pre-Fregean sense. By making this distinction it becomes clear that these pre-Fregean theories cannot be meant to solve the propositional attitude problem. Notwithstanding this fact, Locke and Arnauld are able to make a distinction between asserted and unasserted propositions (in their sense). The way Locke makes this distinction (...) turns out to be very different from the way it is made by Arnauld. (shrink)

Ernest Mandel theorised the capitalist world economy as an articulated system of capitalist, semi-capitalist and precapitalist relations of production, linked to each other by capitalist relations of exchange and domination by the capitalist world market. This seems to be an interesting starting point for an historically well-founded theory, building on and going beyond Marx's work, of the worldwide expansion of the capitalist mode of production from its origins to the present. In his attempt to formulate his theory, Mandel did not (...) succeed in resolving all difficulties, however. His main works – Marxist Economic Theory and Late Capitalism – show a number of dangling loose ends. The central question is whether these loose ends are merely technical difficulties or whether they reveal fatal flaws in the theory as a whole. In order to come a step closer to answering this question, a conference was organised in Amsterdam, November 2003. This introduction formulates the five, closely interrelated issues that were highlighted at this conference. (shrink)

Masters Thesis -- Stellenbosch University, 2019.

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)

This paper is on the update semantics for might of Veltman. Threeconsequence relations are introduced and studied in an abstract setting.Next we present sequent-style systems for each of the consequence relations.We show the logics to be complete and decidable. The paper ends with asyntactic cut elimination result.

The contention in this paper is that the theological-political disputes Spinoza was concerned with 350 years ago are similar to the conspiratorial disputes we experience today. The world in Spinoza’s Tractatus theologico-politicus, a political intervention in his time, serves as a “mirror image”, that is to say, it deals with the same problem we face today albeit in a different mode. Understanding our contemporary condition under the auspices of a Spinozist perspective, problems in countermeasures to the conspiratorial disputes come to (...) light. Scholarly work and practice focus on the epistemological dimension of conspiracy theories, tying in the extent to which they are problematic to the degree in which they deal in untruth. However, the lesson from Spinoza’s analysis of the theological-political disputes is that such theories do not deal in truth, but, in affect, they do not spring from a lack of education but a lack of certainty. The work of Spinoza opens up a different approach, and if our aim is like that of the TTP, to defend political life against the threat of civil war, such a different approach is in order. (shrink)

In this thesis, I investigate realist, anti-realist and pluralist views in the philosophy of science and the philosophy of complexity. The philosophy of science can inform the philosophy of complexity and vice versa because we can consider scientific inquiry to largely involve the study of complex systems. I however find that the relevant realist, anti-realist and pluralist views are problematic in various ways, and that a version of pragmatism suggests a promising alternative. This version of pragmatism incorporates elements of pluralism, (...) but maintains a commitment to epistemic hierarchy, convergence and progress. The way to develop such a version of pragmatism is, I argue, by rebooting William Whewell’s 19th century philosophy of science. Whewell however held to the following two transcendental claims: 1. Empirical inquiry undertaken in science properly practiced can reveal necessary truths. 2. The revelation of such necessary truths grants us a glimpse of the mind of God. Such transcendental claims are obviously at odds with pragmatism. There are however core features of Whewell’s view that are notably pragmatist in nature, features that explicitly inspired Charles Sanders Piece’s convergent pragmatism. These are as follows: 3. Subject and object (or mind and world) are inextricably entwined during scientific inquiry; they are not separated by anything like a correspondence relationship. 4. Science progresses via what Whewell calls the consilience of inductions (an ongoing merging of scientific theories, a merging that increases our understanding of the world over time). I modify Whewell’s view by stripping away its transcendental elements while maintaining its pragmatist elements. What remains is, I argue, a robust and novel kind of pragmatism suitable for being introduced into the contemporary philosophy of science. Whewell suitably-pragmatised can offer new insights into ongoing debates, particularly those around the nature of scientific progress, scientific truth and scientific understanding. (shrink)

The notion of cognitive act is of importance for an epistemology that is apt for constructive type theory, and for epistemology in general. Instead of taking knowledge attributions as the primary use of the verb 'to know' that needs to be given an account of, and understanding a first-person knowledge claim as a special case of knowledge attribution, the account of knowledge that is given here understands first-person knowledge claims as the primary use of the verb 'to know'. This means (...) that a cognitive act is an act that counts as cognitive from a first-person point of view. The method of linguistic phenomenology is used to explain or elucidate our epistemic notions. One of the advantages of the theory is that an answer can be given to some of the problems in modern epistemology, such as the Gettier problem. (shrink)

Sound and complete axiomatizations are provided for a number of different logics involving modalities for the knowledge of multiple agents and operators for branching time, extending previous work of Halpern, van der Meyden and Vardi [to appear, SIAM Journal on Computing] for logics of knowledge and linear time. The paper considers the system constraints of synchrony, perfect recall and unique initial states, which give rise to interaction axioms. The language is based on the temporal logic CTL*, interpreted with respect to (...) a version of the bundle semantics. (shrink)