Current status of the lateral flow immunoassay for the detection of SARS-CoV-2 in nasopharyngeal swabs

Early detection of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and diagnosis of coronavirus disease 2019 (COVID-19) are priorities during the pandemic. Symptomatic and suspected asymptomatic individuals should be tested for COVID-19 to confirm infection and to be excluded from social interactions. As molecular testing capacity is overloaded during the pandemic, rapid antigen tests, such as lateral flow immunoassays (LFIAs), can be a useful tool as they allow greater test availability and obtain results in a very short time. This short review aims to present the analytical properties of LFIAs in the detection of SARS-CoV-2 in nasopharyngeal swabs. Lateral flow immunoassay is a method that combines thin-layer chromatography and indirect immunochemical sandwich method and allows the detection of a specific SARS-CoV-2 antigen in nasopharyngeal swabs. Swab specimens should be adequately collected and tested as soon as possible. Users should pay attention to quality control and possible interferences. Antigen tests for SARS-CoV-2 show high sensitivity and specificity in cases with high viral loads, and should be used up to five days after the onset of the first symptoms of COVID-19. False positive results may be obtained when screening large populations with a low prevalence of COVID-19 infection, while false negative results may happen due to improper specimen collection or insufficient amount of antigen in the specimen. So as to achieve reliable results, a diagnostic accuracy study of a specific rapid antigen test should be performed.     

Cultivating Intergroup Emotions: An Intergroup Threat Theory Approach

The current study tests whether media consumption is associated with negative intergroup emotions toward Blacks, Latinos, and Asians and whether media use indirectly influences intergroup emotions via threat perceptions. We do so using a two-study survey design. Results from Study 1 indicated that media consumption is associated with anger toward Latinos and Asians but not anger toward Blacks. We also found that media use was associated with anxiety toward Blacks, Latinos, and Asians. Results from Study 2 indicated that media use indirectly influences anger and anxiety toward Blacks and Latinos through perceptions of threat. Media consumption did not indirectly influence anger and anxiety toward Asians, though perceptions of threat did directly influence intergroup emotions toward this group. The discussion highlights the important, but negative, role of media in intergroup processes.     

Gender,work and workplace learning

In this paper, I mill argue that contemporary debates about learning in the workplace fail to pay adequate attention to issues of gender and power in organisations. With reference to the feminist literature on the sociology of organisations, I will review some of the central ideas of the work of a few prominent adult educators on the topic of workplace learning. In this process, I will endeavour to highlight the uncritical way in which the discourse over workplace learning has developed within adult education circles. The relative absence of critical perspectives, and the embracing of dominant management thinking about organisational change, mean that this literature in fact fails to provide adult educators in organisations with an adequate framework for analysing and understanding the complex dynamics of their work, and threatens to further entrench structures and practices which discriminate against women.     

Preservice Secondary Science Teachers’ Teaching and Reflections During a Teacher Education Program

The 39 preservice teachers (PSTs) who participated in this study were enrolled in a masters program for secondary science teacher certification. Initially they held broad ideas about teaching and learning gleaned from their own experiences. Guided by the program course work, some PSTs embraced the pedagogical approaches introduced in the program, applied them in their teaching, and reflected on the outcomes. Their reflections showed that they were focused on keeping all of their students interested in science and on student participation in the process of meaning-making. Some PSTs embraced the program goals but struggled to achieve them in teaching. Others focused on transmission of content and did not attempt to develop an environment of student agency. There were nine career-changer PSTs and most of them remained teacher-centered throughout the program. The implications of student- and teacher-centered approaches adopted by the PSTs and the rationales provided by them are discussed in the paper.     

On Developing Content‐oriented Theories Taking Biological Evolution as an Example

Both in Europe and the United States there is a growing interest in design research. One example is the design and validation of topic‐oriented teaching–learning sequences. This research may be said to have two objectives. One is to design and test “useful products”, such as teachers’ guides and study material for students, which may be put into practice in various ways. The second is to contribute to the development of educational science; for example, understanding conditions for learning of given topics under regular classroom conditions. This article concerns the latter objective and deals with the development of content‐oriented theories stating conditions that promote learning with long‐term understanding of given topics. We present one such theory, concerning evolution by natural selection, and describe the arguments and evidence that underlie the theory, which we regard as a well‐founded hypothesis. Some methodological problems associated with testing this type of theory are discussed, as well as the role of content‐oriented theories in strengthening science education research as an autonomous specialization within educational science.     

Student Difficulties in Socio‐scientific Argumentation and Decision‐making Research Findings: Crossing the borders of two research lines

Students' poor argumentation in the context of socio‐scientific issues has become a concern in science education. Identified problems associated with student argumentation in socio‐scientific issues are misevaluation of evidence, naïve nature of science conceptualizations, and inappropriate use of value‐based reasoning. In this theoretical paper, the authors propose that incorporation of decision‐making research findings to argumentation research may help students overcome these problematic areas. For this aim, decision‐making research findings about value‐focused decision‐making framework and common heuristics have been discussed. Specifically, the authors propose that explicit teaching of argumentation research should provide students a decision‐making framework in which students can consider their values about a socio‐scientific issue and assess different alternatives as well as incorporate teaching about common heuristics. The authors believe that this incorporation is necessary for a quality student argumentation in socio‐scientific issues.     

Linguistic Resources Used in Grade 8 Students’ Submicro Level Explanations—Science Items from TIMSS 2007

Explanations involving submicro levels of representation are central to science education, but known to be difficult for students in secondary school. This study examines students’ written explanations of physical and chemical phenomena regarding matter and changes in matter, in a large-scale test. This is done in order to understand linguistic challenges in constructing submicro level explanations involving the particle model of matter. Drawing from systemic functional linguistics, the lexicogrammatics used in explanations for realising experiential meaning in student explanations were analysed. We used answers to two partly constructed response items from the Swedish part of Trends in International Mathematics and Science Studies 2007, grade 8, to sort out explanations referring to the particle model of matter. These answers (86 from 954) were analysed regarding choices of vocabulary and grammar to distinguish between macro and submicro level of representation. The results show that students use a wide variety of lexicogrammatical resources to realise what happens on both macro and submicro level of representation, with greater diversity of verbs on the submicro level of explanation. The results suggest an uncertainty about the distinction between macro and submicro level of explanation.     

The interplay between subject recontextualizers: Social reproduction through critical reading

This article uses a Bernsteinian approach to explore, examine, and theorize about an activity in the upper-secondary curriculum within the Swedish Language subject. Based on an examination of the interplay between different educational actors in this recontextualization process the possibilities for pupils with different social backgrounds and their possibilities to gain access to valuable knowledge are delineated. The analysis is conducted in relation to a specific classroom activity called ‘reading critically’, of which four different aspects are described, each of which in its own way illustrates how didactic choices are justified in general and also specifically for pupils from different social backgrounds. Finally, an attempt is made to examine the findings in light of the recent neo-liberal turn in education in Sweden.