The COVID-19 pandemic has necessitated innovations in data collection protocols, including use of virtual or remote visits. Although developmental scientists used virtual visits prior to COVID-19, validation of virtual assessments of infant socioemotional and language development are lacking. We aimed to fill this gap by validating a virtual visit protocol that assesses mother and infant behavior during the Still Face Paradigm and infant receptive and expressive communication using the Bayley-III Screening Test. Validation was accomplished through comparisons of data collected (...) during in-person laboratory visits and virtual visits conducted via Zoom. Of the 119 mother-infant dyads who participated, 73 participated in lab visits only, 13 participated in virtual visits only, and 33 dyads participated in a combination of lab and virtual visits across four time points. Maternal perspectives of, and preferences for, virtual visits were also assessed. Proportions of missing data were higher during virtual visits, particularly for assessments of infant receptive communication. Nonetheless, comparisons of virtual and laboratory visits within a given time point indicated that mothers and infants showed similar proportions of facial expressions, vocalizations and directions of gaze during the SFP and infants showed similar and expected patterns of behavioral change across SFP episodes. Infants also demonstrated comparable expressive and receptive communicative abilities across virtual and laboratory assessments. Maternal reports of ease and preference for virtual visits varied by infant age, with mothers of 12-month-old infants reporting, on average, less ease of virtual visits and a preference for in-person visits. Results are discussed in terms of feasibility and validity of virtual visits for assessing infant socioemotional and language development, and broader advantages and disadvantages of virtual visits are also considered. (shrink)

C. C. W. Taylor presents a selection of his essays in ancient philosophy, drawn from forty years of writings on the subject. The central theme of the volume is the moral psychology of Plato and Aristotle, with a special focus on pleasure and related concepts, an area central to Greek ethical thought. Taylor also discusses Socrates and the Greek atomists, showing how Plato's ethics grows out of the thought of Socrates, and that pleasure is also a central concept for the (...) atomists. Pleasure, Mind, and Soul provides a fascinating survey of a range of important topics in the work of some of the greatest ancient philosophers, and which remain the subject of lively philosophical debate today. (shrink)

This authored book provides an overview and introduction to the study of feminist theory and practice in the social sciences, providing a starting point for further and more advanced study of the nexus of feminism, gender and development.

Education is so strongly emphasized in the Chinese culture that academic success is widely regarded as the only indicator of success, while too much physical activity is often discouraged because it drains energy and affects academic concentration. This study investigated the relations among academic achievement, self?esteem, school conduct and physical activity level. The participants were 333 Chinese pre?adolescents (aged 8?12) in Hong Kong. Examination results and conduct grades were obtained from the school records. Global self?esteem was measured with the Physical (...) self?description questionnaire (PSDQ), while physical activity patterns of the children were assessed with the Physical activity questionnaire for children (PAQ?C). Results showed that high academic achievers consistently attained better school conduct marks. However, physical activity level was quite an independent entity that was related neither to academic achievement nor school conduct. Furthermore, regression analyses showed that only academically high?achieving boys and physically active boys had higher self?esteem. (shrink)

It is shown that the usual procedures of obtaining the macroscopic Maxwell equations from the microscopic Maxwell-Lorentz equations by performing averages contain an arbitrary choice of gauge. By a suitable different choice of the gauge the so-obtained Maxwell equations can be cast back to the form of the starting Maxwell-Lorentz equations. Therefore one cannot consider the Maxwell equations to be obtainable from the Maxwell-Lorentz equations by simply performing averages. The implication of this result is that besides the electromagnetic fields produced (...) by the moving electric charges, as given by the Maxwell-Lorentz equations, there may be some other agents that cannot be identified as some kind of motion of the electric charges and that participate in the production of the electromagnetic fields. (shrink)

It is shown that the Maxwell-Lorentz equations can be deduced from the law of Biot-Savart by simply performing some theoretical experimentations.

Lazare Carnot was the unique example in the history of science of someone who inadvertently owed the scientific recognition he eventually achieved to earlier political prominence. He and his son Sadi produced work that derived from their training as engineers and went largely unnoticed by physicists for a generation or more, even though their respective work introduced concepts that proved fundamental when taken up later by other hands. There was, moreover, a filial as well as substantive relation between the work (...) of father and son. Sadi applied to the functioning of heat engines the analysis that his father had developed in his study of the operation of ordinary machines. Specifically, Sadi's idea of a reversible process originated in the use his father made of geometric motions in the analysis of machines in general. (shrink)

What is ugly? One of the leading cultural commentators of our times, Stephen Bayley, takes us on a journey of discovery by skillfully weaving centuries of art and design history into a discourse on the nature of beauty and its polar opposite, ugly.

Since the industrial revolution, when everything ran by clockwork, people have understood how important it is to live in the moment. But over time our world has grown increasingly busy, and we've lost our ability to truly savour each unique experience and the simple pleasures the world has to offer. Cultural commentator and critic Stephen Bayley seeks to explain what real value is: it's about taking the time and making the effort to appreciate things, of understanding the permanent charm (...) of modest daily rituals performed with care and feeling. Of caring about appearances and meaning. Of being bold in matters of taste. Of fully understanding the source of lasting pleasure. Of making every encounter with an object or person meaningful. Value is an elegiac account of what's recently been lost in the digital apocalypse. But also an enthusiastic anticipation of what we can regain in a post-viral, more analogue and more thoughtful world. (shrink)

Concerns about exploiting the poor or economically disadvantaged in clinical research are widespread in the bioethics community. For some, any research that involves economically disadvantaged individuals is de facto ethically problematic. The economically disadvantaged are thought of as “venerable” to exploitation, impaired decision making, or both, thus requiring either special protections or complete exclusion from research. A closer examination of the worries about vulnerabilities among the economically disadvantaged reveals that some of these worries are empirically or logically untenable, while others (...) can be better resolved by improved study designs than by blanket exclusion of poorer individuals from research participation. The scientific objective to generate generalisable results and the ethical objective to fairly distribute both the risks and benefits of research oblige researchers not to unnecessarily bar economically disadvantaged subjects from clinical research participation. (shrink)

Since 1981 AIDS has illuminated, like a roving searchlight, a series of ethical questions, which extend far beyond the apparently narrow limits of one disease. It has revealed, one by one, human attitudes and behaviours that were previously unquestioned, or unobserved - based on unidentified but shaky pre-suppositions.This commentary offers two contrasting perspectives on the problems facing developing countries. In the first part, I comment on the preceding article, from the perspective of a clinician who has worked for many years (...) in Africa, and who witnessed the emergence of AIDS in the early 1980s and its medical, social, political and economic consequences.1 In the second, I comment on a conference in Lusaka in September 1999 that addressed many of the issues.Narrowing the gap?“Narrowing the gap” raises questions about truth or transparency in the activities of multinational companies, the ethics and economics of health care in global society and the distribution of responsibility for unwanted side effects of new treatments. The scale of HIV infection in developing countries draws attention to weaknesses or instability in theoretical and practical structures, which serve - or should serve - human wellbeing, whenever it is disturbed by disease.Truth and transparencyDuring the last 60 years, combined with improved standards of living, the products of pharmaceutical effort and ingenuity have resulted in large gains in life expectancy. These were most marked in rich northern societies, but even poor southern countries had seen it extended by 15 to 20 years, until recently.However, “the costs of drug development are not small”.2 A detailed study of costs of clinical trials found that the total cost of new drug development can be as high as $500 million per drug.3 Patent laws allow a temporary monopoly for the production and sale for a number of years. During this “protected” …. (shrink)