We sought to gain more insight into the effects of attention focus and time constraints on skill learning and performance in novices and experts by means of two complementary experiments using a table tennis paradigm. Experiment 1 showed that skill-focus conditions and slowed ball frequency disrupted the accuracy of experts, but dual-task conditions and speeded ball frequency did not. For novices, only speeded ball frequency disrupted accuracy. In Experiment 2, we extended these findings by instructing novices either explicitly or by (...) analogy . Explicitly instructed novices were less accurate in skill-focused and dual-task conditions than in single-task conditions. Following analogy instruction novices were less accurate in the skill-focused condition, but maintained accuracy under dual-task conditions. Participants in both conditions retained accuracy when ball frequency was slowed, but lost accuracy when ball frequency was speeded, suggesting that not attention, but motor dexterity, was inadequate under high temporal constraints. (shrink)

Choking under pressure describes the phenomenon of people performing well below their expected standard under circumstances where optimal performance is crucial. One of the prevailing explanations for choking is that pressure increases the conscious attention to the underlying processes of the performer's task execution, thereby disrupting what would normally be a relatively automatic process. However, research on choking has focused mainly on the influence of pressure on motor performance, typically overlooking how it might alter the way that vision is controlled (...) when performing these motor actions. In this article we ask whether the visual component of expert motor-skill execution is susceptible to choking much like the motor component is thought to be. To do so, we draw heavily on empirical findings from studies of sporting expertise, in particular focussing on the role of gaze in three types of visually-guided actions: interceptive actions, aiming tasks, and anticipatory skill. For each of these skills we evaluate the nature of the expert advantage, discuss the role of consciousness in their control, examine the potential impact of pressure on task performance, and consider interventions designed to reduce the likelihood of choking when performing these tasks. (shrink)

A critical examination of the history of theories and uses of concepts such as ‘primitive’ and ‘savage’ in the academic study of religion in imperial, colonial and postcolonial contexts is particularly urgent in our time with its demands to decolonise Western models of knowledge production. In Savage Systems (1996) and Empire of Religion (2014), David Chidester has contributed to this project by relating the invention and use of terms such as ‘religion’, ‘primitive’ and ‘savage’ by theorists of religion in European (...) imperial metropoles to South African colonial and indigenous contexts. This article intends to take Chidester’s project further by relating Gerardus Van der Leeuw’s phenomenological analysis of ‘primitive mentality’ (particularly in De primitieve mensch en de religie, 1937) to Chidester’s analysis and postcolonial critique of imperial theories of religion. By taking animism and dreams in Chidester’s and Van der Leeuw’s works as example, it is argued that in spite of the latter’s decontextualised use of ethnological material, a fundamental shift occurred in the judgement of ‘primitive’ religion from Tylor’s evolutionary to Van der Leeuw’s phenomenological analysis, which is contrary to claims according to which modern theories are unanimously denigratory of indigenous religions. (shrink)

Interviews met zeven Vlaamse filosofen over hun favoriete speelfilms en de filosofische thema's die daarin aan bod komen.

The Rustenburg Conference of churches that took place in 1990 was a critical turning point for Christianity in South Africa. Besides the important declaration at the end of the conference, a statement was also made by the women at the conference. Although this statement is lesser known, it was and still is of utmost importance because it addresses the plight of women in South Africa. The focus of this article is the relevance of the statement made by the women more (...) than 30 years later. The article is written from a church historical perspective. To achieve this objective, the research in this article is based on qualitative literature search. It focuses on relevant literature that includes books, scholarly articles, online articles and scientific data provided by Statistics South Africa. It starts with a brief overview of the conference and important events that took place; it then moves on to the statement by the women at the conference before arguing that the content of the statement still is an important voice from the past that reminds us of the plight of women in South Africa. The role of the church as an important agent of change is then discussed briefly before concluding with an example of a programme by the South African Council of Churches (SACC) that is aimed at change in society. Contribution: In the conclusion, the author proposes a South African conference for women where current programmes can be synchronised and planning for the future can be done. (shrink)

This monograph-length contribution to the Common Knowledge symposium “Peace by Other Means” reviews and assesses the state of ethnographic and political scholarship concerning how nonstate, tribal societies deal with peacemaking and peacekeeping. A central argument is that the condition among nonstate societies was and is neither one of permanent war nor one of permanent peace but one of permanent peacelessness. Nonstate societies recognize the danger of warfare and take measures to reduce its likelihood, or at least try to mitigate its (...) destructiveness. This article treats the politics, strategies, and practices of peacemaking in tribal societies throughout the world, as well as the full spectrum of attempts at war mitigation. (shrink)

Prof. W.A. Dreyer played an important role in the continuous reformation of the Nederduitsch Hervormde Kerk van Afrika (NHKA). This contribution to his Festschrift is not about him. He would not want that. It is about the church and how his understanding of reformed ecclesiology became the basis on which the transformation from ‘ Volkskerk ’ to missional church took place. According to himself, that was his calling and his life’s work. The importance of his contribution cannot be understood without (...) the historical background in which it played out. Neither is it possible to envisage what really happened without acknowledging the theologians who played an important part in his life. This article therefore starts with a short overview of the history of the NHKA. It then proceeds with an overview of how important theologians in the NHKA influenced his ecclesiology. It concludes with three specific contributions that Prof. W.A. Dreyer made which makes him a key role player which led the NHKA on the way of Ecclesia reformata semper reformanda. Contribution: Prof. W.A. Dreyer became an important church leader in the Netherdutch Reformed Church. His leadership resulted in important changes in the church and especially in the ecclesiology of the church. This article, which is part of his Festschrift, gives an overview of his theological contribution through the lens of semper reformanda. By doing so, it indicates how important is the role of church leaders. All the research is based on his scholarly work. (shrink)

Education in Africa is in a crisis. Some scholars go as far as to say that it is broken. This was also noted when the United Nations Sustainable Development Goals, linked to the Agenda 2063: The Africa We Want, were developed. One of the goals was defined as to ‘Ensure inclusive and equitable quality education and promote lifelong learning opportunities for all’. This article explores the important role of education in transforming societies. To achieve this objective, the research in this (...) article is based on a qualitative literature search. It focuses on relevant literature that included books, scholarly articles, online articles and scientific data provided by Statistics South Africa. It starts off by describing the brokenness of education in South Africa through the latest statistics that provide a very dark picture of education in the country. In the second place, the article revisits the Reformation to indicate that the church can and is called to play an important role in the improvement of education. The article concludes with two examples of how church organisations and specific churches in South Africa take up the challenge to transform societies through specific educational programmes.Contribution: Specific mention is made of the programme of the South African Council of Churches called The South Africa We Pray For and Little Seeds, which is a combined programme in Early Childhood Development. As such, what happens in South Africa can be an example to the rest of Africa. (shrink)

In this introduction to the first installment of the Common Knowledge symposium “Peace by Other Means,” the journal's editor questions the assumptions that underwrite standard approaches in the social sciences to the issue of how non-state, tribal societies have dealt with matters of war and peace. He in particular examines and finds wanting the approach that Jared Diamond takes in The World until Yesterday: What Can We Learn from Traditional Societies?. Whereas Diamond's theme is that modern states can learn much (...) about many things from traditional hunter-gatherer societies, with respect to peacemaking and peace-keeping he finds traditional societies distinctly inferior, and the arguments by which he reaches this conclusion are tautological and also beg the question. This prefatory essay explains that “Peace by Other Means” will analyze and detail non-Western and premodern European means of keeping peace that modern theorists of conflict resolution are reluctant to credit or incompetent to assess. (shrink)

When cells are starved of their substrate, many nutrient transporters are induced. These undergo rapid endocytosis and redirection of their intracellular trafficking when their substrate becomes available again. The discovery that some of these transporters also act as receptors, or transceptors, suggests that at least part of the sophisticated controls governing the trafficking of these proteins has to do with their signaling function rather than with control of transport. In yeast, the general amino acid permease Gap1 mediates signaling to the (...) protein kinase A pathway. Its endocytic internalization and intracellular trafficking are subject to amino acid control. Other nutrient transceptors controlling this signal transduction pathway appear to be subject to similar trafficking regulation. Transporters with complex regulatory control have also been suggested to function as transceptors in other organisms. Hence, precise regulation of intracellular trafficking in nutrient transporters may be related to the need for tight control of nutrient‐induced signaling. (shrink)

Scholars and policymakers have increasingly advocated to engage citizens more substantially in the development of science and technology. However, to a large extent it has remained unknown how citizens can contribute to technology development. In this study, we systematically characterized citizens’ contributions in the development of nanotechnology for health. We explored to which technology aspects citizens are able to provide suggestions on and on which values their suggestions are based. Fifty citizens in the Netherlands were asked to discuss different applications (...) of nanotechnology for health. They were divided over eight focus groups, which lasted approximately 6.5h each. The citizens were able to contribute to various technology aspects; they mainly focused on the technologies’ implementation and use, they paid some attention to the development and system aspects, and also addressed, but less, the design and communication aspects. Their suggestions were often derived from concerns about the potential effects of the technologies and were predominantly based on the values of well-being, autonomy, and privacy. (shrink)

Inleiding tot de filosofie, ethiek en godsdienst.

For more than two decades euthanasia and assisted suicide have been openly debated in the Netherlands. This development started in 1973 when the Regional Court in Leeuwarden decided a case in which a physician had administered a deadly dose of morphine to her terminally ill mother on the mother's serious and persistent request. In this case the court concluded that the average Dutch physician no longer considered it his or her duty to prolong a patient's life under all circumstances. The (...) court accepted that in specific cases a physician is allowed to prevent serious and irreversible suffering, even if the patient's life is short ened. This case was the first in which a legal opening for euthanasia or assisted suicide was created. In this specific case the physician was formally declared guilty, but the court gave her a suspended sentence of one week imprisonment. This decision started a debate on euthanasia and assisted suicide throughout all levels of Dutch society. (shrink)

This paper deals with certain ethical problems inherent in psychological research based on internet communication as stored information. Section 1 contains an analysis of research on Internet debates. In particular, it takes into account a famous example of deception for psychology research purposes. In section 2, the focus is on research on personal data in texts published on the Internet. Section 3 includes an attempt to formulate some ethical principles and guidelines, which should be regarded as fundamental in research on (...) stored information. (shrink)

The Dutch policy objective of a fully sustainable livestock sector without mutilations by 2023 is not compatible with the routine practice of tail docking to minimize the risk of tail biting. To examine farmer attitudes towards docking, a telephone survey was conducted among 487 conventional and 33 organic Dutch pig farmers. “Biting” (of tails, ears, or limbs) was identified by the farmers as a main welfare problem in pig farming. About half of the farmers reported to have no tail biting (...) problems in their own herd. When farmers did report problems, they most often reported figures between 1 and 5 % of the animals. High incidences of tail biting were anticipated when trying to keep undocked pigs. Enrichment materials used in the conventional sector included mainly chains (52–63 % of the farms) and hanging rubber or plastic balls (22–30 %). Straw, sawdust, or wood shavings was hardly provided in conventional pig farming (2–3 %), in contrast to organic farming (88–100 % of farms). Conventional pig farmers feel a curly tail is not very important for sustainable pig farming. They consider enrichment to be less effective and tail docking to be less stressful for them and their piglets than their organic colleagues do. Pig farmers identified climate as a main risk factor for tail biting as opposed to enrichment. The objective of reducing routine tail docking requires solutions for dealing with tail biting problems at the farm level. In this process, transfer of scientific knowledge about enrichment materials and other measures to prevent and cure tail biting is critical, as is a change in farmer attitudes and awareness of the moral issues involved. (shrink)

The Dutch policy objective of a fully sustainable livestock sector without mutilations by 2023 is not compatible with the routine practice of tail docking to minimize the risk of tail biting. To examine farmer attitudes towards docking, a telephone survey was conducted among 487 conventional and 33 organic Dutch pig farmers. “Biting” (of tails, ears, or limbs) was identified by the farmers as a main welfare problem in pig farming. About half of the farmers reported to have no tail biting (...) problems in their own herd. When farmers did report problems, they most often reported figures between 1 and 5 % of the animals. High incidences of tail biting were anticipated when trying to keep undocked pigs. Enrichment materials used in the conventional sector included mainly chains (52–63 % of the farms) and hanging rubber or plastic balls (22–30 %). Straw, sawdust, or wood shavings was hardly provided in conventional pig farming (2–3 %), in contrast to organic farming (88–100 % of farms). Conventional pig farmers feel a curly tail is not very important for sustainable pig farming. They consider enrichment to be less effective and tail docking to be less stressful for them and their piglets than their organic colleagues do. Pig farmers identified climate as a main risk factor for tail biting as opposed to enrichment. The objective of reducing routine tail docking requires solutions for dealing with tail biting problems at the farm level. In this process, transfer of scientific knowledge about enrichment materials and other measures to prevent and cure tail biting is critical, as is a change in farmer attitudes and awareness of the moral issues involved. (shrink)

We investigate two under-explored factors in mitigating the risk of corporate fraud and regulatory enforcement against fraud, namely institutional investors and political connections. The role of institutional investors in the effective monitoring of a firm’s management is well established in the literature. We further observe that firms that have a large proportion of their shares held by institutional investors have a lower incidence of enforcement actions against corporate fraud. The importance of political connections for enterprises, whether in a developed market (...) such as the United States or an emerging market such as China, has been established by previous studies. However, we find evidence of another positive effect of political connections: they may reduce the incidence of enforcement action against corporate fraud. We also find that political connections play a more significant role in reducing regulatory enforcement incidents against non-state-owned enterprises and firms in weaker legal environments, whereas institutional ownership plays a more important role in reducing regulatory enforcement incidents against state-owned enterprises. (shrink)

The evolutionary claim that the function of self-awareness lies, at least in part, in the benefits of theory of mind (TOM) regained attention in light of current findings in cognitive neuroscience, including mirror neuron research. Although certain non-human primates most likely possess mirror self-recognition skills, we claim that they lack the introspective abilities that are crucial for human-like TOM. Primate research on TOM skills such as emotional recognition, seeing versus knowing and ignorance versus knowing are discussed. Based upon current findings (...) in cognitive neuroscience, we provide evidence in favor of an introspection-based simulation theory account of human mindreading. (shrink)

This article explores and seeks to appropriate theologically the African notion of vital force as a relational, non-reductionist ecological concept that would enrich the Christian doctrine of pneumatheology. The understanding that relational and pneumatological categories are viable within the theology–science dialogue is the broader framework within which this article is conceived. The relationship between natural theology and revelation provides an epistemological standpoint that does not divorce Spirit and reality.

This essay, by the editor of Common Knowledge, introduces the sixth and final installment of “Fuzzy Studies,” the journal's “Symposium on the Consequence of Blur.” Suggesting that “Fuzzy Studies” should be understood in the context of a desultory campaign against zeal conducted in the journal for almost twenty years, he explains that the editors' assumption has been that any authentic case for the less adamant modes of thinking, or the less focused ways of seeing, needs to be unenthusiastic and carefully (...) ramified. To establish the distinction between overenthused and unemphatic approaches to blur, he contrasts the ecstatically amorphous “Blur building” with examples of classical Chinese landscape painting. Elizabeth Diller and Richard Scofidio, in their book blur: the making of nothing, chronicle the development of their plans for the Blur building and, in the process, inadvertently show that, to overbear various negative associations of blur and fog, the authors/architects grew self-contradictorily emphatic about the need to produce de-emphasis in architecture and in modern life. Perl shows how this self-contradiction appears also in phenomenology-inflected writings on blur by T. J. Clark, Yve-Alain Bois and Rosalind Kraus, J.-P. Sartre, and Georges Bataille, but not in the work of the phenomenologist François Jullien, whose book The Great Image Has No Form analyzes the role of blur in classical Chinese art theory and practice. Where traditional Western painting, Jullien argues, calls for voyeuristically intense focus, traditional Chinese painting stimulates “dé-tente, relaxation or ‘untensing’.” Intense focus on a blur is still, Perl observes, an intense focus. In describing a painting by the Yuan Dynasty master Ni Zan, Perl concludes that the only way to be un-self-contradictorily positive about fuzziness, whether in logic or aesthetics, is to de-reify and de-differentiate with the aim of achieving blandness. (shrink)

About one third of patients with epilepsy have seizures refractory to the medical treatment. Electrical stimulation mapping is the gold standard for the identification of “eloquent” areas prior to resection of epileptogenic tissue. However, it is time-consuming and may cause undesired side effects. Broadband gamma activity recorded with extraoperative electrocorticography during cognitive tasks may be an alternative to ESM but until now has not proven of definitive clinical value. Considering their role in cognition, the alpha and beta bands could further (...) improve the identification of eloquent cortex. We compared gamma, alpha and beta activity, and their combinations for the identification of eloquent cortical areas defined by ESM. Ten patients with intractable focal epilepsy participated in a delayed-match-to-sample task, where syllable sounds were compared to visually presented letters. We used a generalized linear model approach to find the optimal weighting of each band for predicting ESM-defined categories and estimated the diagnostic ability by calculating the area under the receiver operating characteristic curve. Gamma activity increased more in eloquent than in non-eloquent areas, whereas alpha and beta power decreased more in eloquent areas. Diagnostic ability of each band was close to 0.7 for all bands but depended on multiple factors including the time period of the cognitive task, the location of the electrodes and the patient’s degree of attention to the stimulus. We show that diagnostic ability can be increased by 3–5% by combining gamma and alpha and by 7.5–11% when gamma and beta were combined. We then show how ECoG power modulation from cognitive testing can be used to map the probability of eloquence in individual patients and how this probability map can be used in clinical settings to optimize ESM planning. We conclude that the combination of gamma and beta power modulation during cognitive testing can contribute to the identification of eloquent areas prior to ESM in patients with refractory focal epilepsy. (shrink)

This handbook presents a comprehensive introduction to the core areas of philosophy of education combined with an up-to-date selection of the central themes. It includes 95 newly commissioned articles that focus on and advance key arguments; each essay incorporates essential background material serving to clarify the history and logic of the relevant topic, examining the status quo of the discipline with respect to the topic, and discussing the possible futures of the field. The book provides a state-of-the-art overview of philosophy (...) of education, covering a range of topics: Voices from the present and the past deals with 36 major figures that philosophers of education rely on; Schools of thought addresses 14 stances including Eastern, Indigenous, and African philosophies of education as well as religiously inspired philosophies of education such as Jewish and Islamic; Revisiting enduring educational debates scrutinizes 25 issues heavily debated in the past and the present, for example care and justice, democracy, and the curriculum; New areas and developments addresses 17 emerging issues that have garnered considerable attention like neuroscience, videogames, and radicalization. The collection is relevant for lecturers teaching undergraduate and graduate courses in philosophy of education as well as for colleagues in teacher training. Moreover, it helps junior researchers in philosophy of education to situate the problems they are addressing within the wider field of philosophy of education and offers a valuable update for experienced scholars dealing with issues in the sub-discipline. Combined with different conceptions of the purpose of philosophy, it discusses various aspects, using diverse perspectives to do so. Contributing Editors: Section 1: Voices from the Present and the Past: Nuraan Davids Section 2: Schools of Thought: Christiane Thompson and Joris Vlieghe Section 3: Revisiting Enduring Debates: Ann Chinnery, Naomi Hodgson, and Viktor Johansson Section 4: New Areas and Developments: Kai Horsthemke, Dirk Willem Postma, and Claudia Ruitenberg. (shrink)

This book explores the interplay between logic and science, describing new trends, new issues and potential research developments.

The contributions in this volume treat aspects and manifestations of this cultural symbiosis, and they throw new light on authors and texts both more and less ...

This collection of papers from the workshop serves as the initial volume in the new series Texts in Logics and Games—touching on research in logic, mathematics, computer science, and game theory. “A wonderful demonstration of ...

Modern medicine provides unprecedented opportunities in diagnostics and treatment. However, in some situations at the end of a patient’s life, many physicians refrain from using all possible measures to prolong life. We studied the incidence of different types of treatment withheld or withdrawn in 6 European countries and analyzed the main background characteristics.

Scholars have long been captivated by the parallels between birdsong and human speech and language. In this book, leading scholars draw on the latest research to explore what birdsong can tell us about the biology of human speech and language and the consequences for evolutionary biology. They examine the cognitive and neural similarities between birdsong learning and speech and language acquisition, considering vocal imitation, auditory learning, an early vocalization phase, the structural properties of birdsong and human language, and the striking (...) similarities between the neural organization of learning and vocal production in birdsong and human speech. After outlining the basic issues involved in the study of both language and evolution, the contributors compare birdsong and language in terms of acquisition, recursion, and core structural properties, and then examine the neurobiology of song and speech, genomic factors, and the emergence and evolution of language. Contributors: Hermann Ackermann, Gabriël J.L. Beckers, Robert C. Berwick, Johan J. Bolhuis, Noam Chomsky, Frank Eisner, Martin Everaert, Michale S. Fee, Olga Fehér, Simon E. Fisher, W. Tecumseh Fitch, Jonathan B. Fritz, Sharon M.H. Gobes, Riny Huijbregts, Eric Jarvis, Robert Lachlan, Ann Law, Michael A. Long, Gary F. Marcus, Carolyn McGettigan, Daniel Mietchen, Richard Mooney, Sanne Moorman, Kazuo Okanoya, Christophe Pallier, Irene M. Pepperberg, Jonathan F. Prather, Franck Ramus, Eric Reuland, Constance Scharff, Sophie K. Scott, Neil Smith, Ofer Tchernichovski, Carel ten Cate, Christopher K. Thompson, Frank Wijnen, Moira Yip, Wolfram Ziegler, Willem Zuidema. (shrink)