The WWW is increasingly used as a tool and platform for survey research. Several principles have been developed to deal with the new challenges posed to researchers conducting online surveys. In this paper, we discuss some of the challenges we encountered in all phases of our Web based survey conducted in 2004/2005 among nearly 10,000 respondents in six European countries. We argue how and to what extent we applied the principles and methodologies of online surveys to meet the challenges, ranging (...) from composing sampling frames, questionnaire construction, addressing potential respondents, questionnaire distribution, response rate improvement, to data cleaning and data processing. When relevant, we discuss the differences between the six countries involved. It is concluded that many if not most of the problems encountered in online surveys are solved when taking into account the principles that guide the conduct of conventional surveys. (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)

Lower levels of news use are generally understood to be associated with less political engagement among citizens. But while some people simply have a low preference for news, others avoid the news intentionally. So far little is known about the relationship between active news avoidance and civic engagement in society, a void this study has set out to fill. Based on a four-wave general population panel survey in the Netherlands, conducted between April and July 2020 (N = 1,084) during a (...) crisis situation, this research-in-brief investigates the development of news avoidance and pro-social civic engagement over time. Results suggest that higher news topic avoidance results in higher levels of civic engagement. The study discusses different explanations for why less news can mean more engagement. (shrink)

In recent decades we witnessed ongoing debates about the objectives of history education, with different underlying epistemological perspectives. This qualitative study explored prospective history teachers' beliefs about these objectives of history education. Prospective history teachers of six universities starting a teacher educational programme were invited to answer an open-ended questionnaire about history education. Six objectives were found: (1) memorising; (2) critical/explanatory; (3) constructivist; (4) perspective-taking; (5) moral; and (6) collective-identity objectives. Almost all prospective teachers mentioned several of these objectives. A (...) distinction between two epistemological perspectives on historical knowledge representation (factual or interpretive), was used as a framework for categorising the different objectives. More than half of the respondents mentioned objectives of history education that represent history as factual and objectives that represent history as interpretive. We propose that in actual practice most history teachers are combining epistemologically opposing objectives for pedagogical, political and religious motives. (shrink)

Shifting dietary patterns from animal-based proteins to more plant-based and alternative protein sources – the protein transition – is urgently needed to improve planetary and human health. Public food procurement is considered to be an effective policy instrument to accelerate the protein transition and to be a potential game changer towards a sustainable food system. However, this potential has remained far from leveraged, and it is largely unknown which barriers and enablers exist in that context. Therefore, this study aimed to (...) gain insight into the barriers and facilitators that are perceived by relevant stakeholders when implementing the protein transition in public food procurement. Our study was conducted in the Netherlands, because of the policy goals set by the Dutch government with regard to the protein transition (50% of the proteins consumed should include animal-based proteins and 50% plant-based proteins by 2030) and because the extent to which the protein transition has been included in the food procurement of Dutch (semi-)public organizations is still largely unknown. However, findings are also relevant for other countries. Semi-structured interviews were conducted with participants from a wide range of (semi-)public organizations (e.g., universities, hospitals, governments), in 2022. Five main themes of barriers and facilitators were identified: (1) support and motivation, (2) food availability and offerings, (3) financial considerations and incentives, (4) policies, processes, and contracts, and (5) environmental factors. The insights from this study can strengthen the scientific evidence base and can serve as a foundation for future research. Moreover, the insights can be beneficial to officials working in (semi-)public organizations to effectively design and execute their procurement process, and can help policymakers in policy development to foster (semi-)public organizations to implement the protein transition in their own contexts. (shrink)

Conflict framing is key in political communication. Politicians use conflict framing in their online messages (e.g., criticizing other politicians) and journalists in their political coverage (e.g., reporting on political tensions). Conflicts can take a variety of forms and can provoke different reactions. However, the literature still lacks a systematic and theoretically-grounded conceptual framework that accounts for the multi-dimensionality of political conflict frames. Based on literature from political epistemology, political communication, and related fields such as psychology, we present four conceptual dimensions (...) of political conflicts: (1) the style (civil/uncivil); (2) the subject (personal/substantive); (3) whether it is about underlying moral/epistemic principles or not (deep/superficial conflict); and (4) whether it concerns a normative or factual issue. Results of a content analysis of newspaper articles and politicians’ tweets confirm the usage of these conflict dimensions in the Netherlands during a non-election period. Interestingly, most of the conflicts are civil, substantive, and do not highlight deep fundamental clashes. In light of the current societal concerns about the lack of respect in political debates and the deepening of our political divides, these findings can be considered encouraging. (shrink)

This study examines how mainstream political actors and other organizations use political targeted messages. For this purpose, a data set from ProPublica is used. The study examines 55,918 sponsored Facebook ads that were posted by 236 political actors (i.e., political elites and other organizations) in the United States. (1) Topic classification was used to identify policy issues, (2) network analysis to identify the main policy issues from the various political actors, and (3) Sankey diagrams to visualize microtargeted messages. Our findings (...) indicate that actors focus on traditionally owned issues (i.e., the Democratic Party: environmental policy, social issues, and social welfare; the Republican Party: foreign affairs, law, and government finances). No clear evidence for a focus on wedge issues can be found, however, some first indications (e.g., a focus on reproductive rights, LGBTQ+) are present in a targeted media environment. All in all, the current study helps us to understand in what way political actors deploy targeted messages. (shrink)

Despite changes in their representation and visibility, there are still serious concerns about the inclusion and day-to-day workplace challenges various groups face (e.g., women, ethnic and cultural minorities, LGBTQ+, people as they age, and those dealing with physical or mental disabilities). Men are also underrepresented in specific work fields, in particular those in HEED (Health care, Elementary Education and the Domestic sphere). Previous literature has shown that group stereotypes play an important role in maintaining these inequalities. We outline how insights (...) from research on stigma, social-identity, and self-regulation together increase our understanding of how targets are affected by and regulate negative stereotypes in the workplace. This approach starts from the basis that members of negatively-stereotyped groups are not just passive recipients of negative attitudes, stereotypes, and behaviors, but are active individuals pursuing multiple goals, such as goals for belonging and achievement. We argue that it is only by understanding stigma from the target’s perspective (e.g., how targets are affected and respond) that we can successfully address workplace inequality. Key in this understanding is that stereotypes, prejudice and discrimination have taken on much more subtle forms, with consequences for the way members of stigmatized-groups cope. These insights lead us to propose an approach to understanding barriers to workplace equality that highlights four key aspects: a) the different (often subtle) potential triggers of identity-threat in the workplace for members of stigmatized-groups, b) the ways in which members of stigmatized-groups cope with these threats, c) the role of supportive factors that mitigate potential threats and affect self-regulation, and d) potential hidden costs for the self or others of what appears at first to be effective self-regulation. The focus on threats, coping, support, and potential hidden costs helps us understand why current diversity efforts are not always successful in increasing and maintaining members of stigmatized-groups in organizations, and provides insight into how we can aid efforts to effectively lower barriers to workplace equality. (shrink)

Conflict framing is key in political communication. Politicians use conflict framing in their online messages (e.g., criticizing other politicians) and journalists in their political coverage (e.g., reporting on political tensions). Conflicts can take a variety of forms and can provoke different reactions. However, the literature still lacks a systematic and theoretically-grounded conceptual framework that accounts for the multi-dimensionality of political conflict frames. Based on literature from political epistemology, political communication, and related fields such as psychology, we present four conceptual dimensions (...) of political conflicts: (1) the style (civil/uncivil); (2) the subject (personal/substantive); (3) whether it is about underlying moral/epistemic principles or not (deep/superficial conflict); and (4) whether it concerns a normative or factual issue. Results of a content analysis of newspaper articles and politicians’ tweets confirm the usage of these conflict dimensions in the Netherlands during a non-election period. Interestingly, most of the conflicts are civil, substantive, and do not highlight deep fundamental clashes. In light of the current societal concerns about the lack of respect in political debates and the deepening of our political divides, these findings can be considered encouraging. (shrink)

Background: Only data of published study results are available to the scientific community for further use such as informing future research and synthesis of available evidence. If study results are reported selectively, reporting bias and distortion of summarised estimates of effect or harm of treatments can occur. The publication and citation of results of clinical research conducted in Germany was studied.Methods: The protocols of clinical research projects submitted to the research ethics committee of the University of Freiburg in 2000 were (...) analysed. Published full articles in several databases were searched and investigators contacted. Data on study and publication characteristics were extracted from protocols and corresponding publications.Results: 299 study protocols were included. The most frequent study design was randomised controlled trial , followed by uncontrolled studies , laboratory studies and non-randomised studies . 182 were multicentre studies including 97 international collaborations. 152 of 299 had commercial funding and 46 non-commercial funding. 109 of the 225 completed protocols corresponded to at least one full publication ; the publication rate was 48%. 168 of 210 identified publications were cited in articles indexed in the ISI Web of Science. The median was 11 citations per publication .Conclusions: Results of German clinical research projects conducted are largely underreported. Barriers to successful publication need to be identified and appropriate measures taken. Close monitoring of projects until publication and adequate support provided to investigators may help remedy the prevailing underreporting of research. (shrink)

This collection of essays on themes in the work of John Locke , George Berkeley , and David Hume , provides a deepened understanding of major issues raised in the Empiricist tradition. In exploring their shared belief in the experiential nature of mental constructs, The Empiricists illuminates the different methodologies of these great Enlightenment philosophers and introduces students to important metaphysical and epistemological issues including the theory of ideas, personal identity, and skepticism. It will be especially useful in courses devoted (...) to the history of modern philosophy. (shrink)

gl. 1. Geopoliticheskai︠a︡ determinat︠s︡ii︠a︡ kulʹtury i ėkonomiki. Rolʹ geograficheskikh faktorov v razvitii obshchestva ; Geopoliticheskie osobennosti sot︠s︡iokulʹturnoĭ istorii Rossii -- gl. 2. Kulʹturnai︠a︡ sostavli︠a︡i︠u︡shchai︠a︡ geopolitiki. Kulʹtura kak instrument geopolitiki ; Dialog kulʹtur v sovremennom mire: opasnai︠a︡ illi︠u︡zii︠a︡, otchai︠a︡nnai︠a︡ vera ili velenie vremeni?

Biobanks are repositories that store human biological materials and their associated data. They are rapidly becoming part of national and international networks and give rise to unique ethico-regulatory issues. Whether consent is informed and whether this term should be used when specimens are collected for biobank research is questionable. Where risks occur, they are usually social and relate to identifiability. Public trust and confidence are important for the success of this type of research. Consensus is growing that governance of biobanks (...) should be harmonised. Controlled specimen and data access agreements are essential. The South African National Health Act and its Regulations, that provide the foundation for the legal framework with regard to human tissue and research in South Africa, are silent on the issue of biobanks and the law lags behind while science and technology advance rapidly. The use of biobank assets will lead to significant benefits in human health and should be encouraged while taking account of the associated ethical, legal and social issues and working towards a balance between these two positions. (shrink)

Brain tumor classification plays a niche role in medical prognosis and effective treatment process. We have proposed a combined feature and image-based classifier for brain tumor image classification in this study. Carious deep neural network and deep convolutional neural networks -based architectures are proposed for image classification, namely, actual image feature-based classifier, segmented image feature-based classifier, actual and segmented image feature-based classifier, actual image-based classifier, segmented image-based classifier, actual and segmented image-based classifier, and finally, CFIC. The Kaggle Brain Tumor Detection (...) 2020 dataset has been used to train and test the proposed classifiers. Among the various classifiers proposed, the CFIC performs better than all other proposed methods. The proposed CFIC method gives significantly better results in terms of sensitivity, specificity, and accuracy with 98.86, 97.14, and 98.97%, respectively, compared with the existing classification methods. (shrink)

Open peer commentary on the article “Examining the Role of Re-Presentation in Mathematical Problem Solving: An Application of Ernst von Glasersfeld’s Conceptual Analysis” by Victor V. Cifarelli & Volkan Sevim. Upshot: The key philosophical premise of von Glasersfeld’s radical constructivism is not necessary to the insightful conceptual analysis presented by Cifarelli and Sevim, which could benefit from abandoning it.

The major portion of this important work is the "Summary of the Republic." Coordinated with Grube’s translation, it proceeds book by book, first summarizing a chunk of text anywhere from a couple of Stephanus sections to several pages, then commenting in lettered notes of from two lines to four and a half pages. More technical material, aimed at advanced students and scholars, appears occasionally in smaller type. There is a fine bibliography. The format is successful: the book is easy to (...) use and attractive in appearance. (shrink)

In ?The Labour Theory of Value and the Concept of Exploitation? I distinguished between two ways in which the labour theory of value is formulated, both of which are common. In the popular formulation, the amount of value a commodity has depends on how much labour was spent producing it. In the strict formulation, which is so called because it formulates the labour theory of value proper, the amount of value a commodity has depends on nothing about its history but (...) only on how much labour would (now) be required to produce something just like it. I argued that strict and popular formulations are often wrongly treated as substantially equivalent, and that the practice of conflating them sustains two false impressions: that the labour theory of value is a basis for saying that capitalists exploit workers, and that the labour theory of value is true. The present paper is a reply to Nancy Holmstrom's recent attempt, in ?Marx and Cohen on Exploitation and the Labor Theory of Value?, to refute the theses of the article referred to above. (shrink)