Glial cells play a central role in the development and function of complex nervous systems. Drosophila is an excellent model organism for the study of mechanisms underlying neural development, and recent attention has been focused on the differentiation and function of glial cells. We now have a nearly complete description of glial cell organization in the embryo, which enables a systematic genetic analysis of glial cell development. Most glia arise from neural stem cells that originate in the neurogenic ectoderm. The (...) bifurcation of glial and neuronal fates is under the control of the glial promoting factor glial cells missing. Differentiation is propagated through the regulation of several transcription factors. Genes have been discovered affecting the terminal differentiation of glia, including the promotion glial–neuronal interactions and the formation of the blood–nerve barrier. Other roles of glia are being explored, including their requirement for axon guidance, neuronal survival, and signaling. BioEssays 23:877–887, 2001. © 2001 John Wiley & Sons, Inc. (shrink)

This book offers both the theoretical background behind the minority effect, teachers' personal experiences as they experienced being a minority, and their analyses and insights for teaching diverse learners. This book uses real-life experiences of diverse people to illustrate that, if not understood and addressed, situational minorities at school or work are unlikely to perform at their highest potentials.

W. J. Mander presents the first ever synoptic history of British Idealism, the school of thought which dominated English-language philosophy from the 1860s to the early 20th century. He restores to its proper place this neglected period of philosophy, introducing the exponents of Idealism and explaining its distinctive concepts and doctrines.

The honour of being the first to teach philosophy in Australia belongs to the Congregationalist minister Barzillai Quaife (1798–1873), in the 1850s, but teaching philosophy did not formally begin until the 1880s, with the establishment of universities (Grave 1984). -/- Two approaches have dominated Western philosophy in Australia: Idealism and materialism. Idealism was prevalent between the 1880s and the 1930s, but dissipated thereafter. It was particularly associated with the work of the first professional philosophers in Australia, such as Henry Laurie (...) (1837–1922), Francis Anderson (1858–1941), William Mitchell (1861–1962) (who rejected the label) and a second generation including W. R. Boyce Gibson (1869–1935). Idealism in Australia often reflected Kantian themes, together with the British, particularly Scottish, revival of interest in Hegel through the work of the ‘Absolute Idealists’ T. H. Green (1836–1882), F. H. Bradley (1846–1924) and Henry Jones (1852–1922), the latter of whom conducted a popular lecture tour of Australia (Boucher 1990). -/- A number of the early New Zealand philosophers, including Duncan MacGregor (1843–1906), William Salmond (1835–1917), and Francis W. Dunlop (1874–1932) were educated in the Idealist tradition and were influential in their communities, but produced relatively little. William Anderson (1889–1955), at Auckland, brother of John at Sydney, was the only New Zealand philosopher that seemed to retain Idealist views. -/- In Australia, materialism gained prominence through the work of John Anderson, who arrived in Australia in 1927, and continues to be influential. John Anderson had been a student of Henry Jones, who can be said to have influenced both strands of Australian philosophical thought. (shrink)

We investigate the dynamics of sensory integration for perceiving musical performance, a complex natural behavior. Thirty musically trained participants saw, heard, or both saw and heard, performances by two clarinetists. All participants used a sliding potentiometer to make continuous judgments of tension (a measure correlated with emotional response) and continuous judgments of phrasing (a measure correlated with perceived musical structure) as performances were presented. The data analysis sought to reveal relations between the sensory modalities (vision and audition) and to quantify (...) the effect of seeing the performances on participants' overall subjective experience of the music. In addition to traditional statistics, functional data analysis techniques were employed to analyze time-varying aspects of the data. The auditory and visual channels were found to convey similar experiences of phrasing but different experiences of tension through much of the performances. We found that visual information served both to augment and to reduce the experience of tension at different points in the musical piece (as revealed by functional linear modeling and functional significance testing). In addition, the musicians' movements served to extend the sense of phrasing, to cue the beginning of new phrases, to indicate musical interpretation, and to anticipate changes in emotional content. Evidence for an interaction effect suggests that there may exist an emergent quality when musical performances are both seen and heard. The investigation augments knowledge of human communicative processes spanning language and music, and involving multiple modalities of emotion and information transfer. (shrink)

Differing findings exist on how Defining Issues Test (DIT) scores relate to intelligence. Further study is needed in order to address aspects of intellect not previously considered and to address how these relationships rival studies that have compared indices of intellect with constructs similar to DIT scores. In the present study, a sample of 117 participants completed the DIT and the Kaufman Adolescent and Adult Intelligence Test (KAIT), which assesses crystallised and fluid intelligence. Structural equation modelling offered supporting evidence that (...) these measurements represent separate sources of information. Statistically significant paths from KAIT crystallised indices to DIT scores were seen, though there was much overlap. Negligible paths were seen from KAIT fluid indices to DIT scores in the sample overall though this relationship strengthens when advanced moral judgement development is considered. Thus, the present study affirms the DIT's construct validity and illustrates how crystallised and fluid intellectual abilities pertain to DIT scores. (shrink)

John Maynard Keynes was the most important economist of the twentieth century. He was also a philosopher who wrote on ethics and the theory of probability and was a central figure in the Bloomsbury Group of writers and artists. In this volume contributors from a wide range of disciplines offer new interpretations of Keynes's thought, explain the links between Keynes's philosophy and his economics, and place his work and Keynesianism - the economic theory, the principles of economic policy, and the (...) political philosophy - in their historical context. Chapter topics include Keynes's philosophical engagement with G. E. Moore and Franz Brentano, his correspondence, the role of his General Theory in the creation of modern macroeconomics, and the many meanings of Keynesianism. New readers will find this the most convenient, accessible guide to Keynes currently available. Advanced students and specialists will find a conspectus of recent developments in the interpretation of Keynes. (shrink)

Historians of the eugenics movement have long been ambivalent in their examination of the links between British hereditary researchers and Nazi Germany. While there is now a clear consensus that American eugenics provided significant material and ideological support for the Germans, the evidence remains less clear in the British case where comparatively few figures openly supported the Nazi regime and the left-wing critique of eugenics remained particularly strong. After the Second World War British eugenicists had to push back against the (...) accusation that their science was intrinsically dictatorial or totalitarian and, as a result, many of their early perceptions of the Nazis were ignored or rationalised away. Further, historians in recent years have focused more directly on the social reformist elements of eugenics, discussing the links between hereditary science and the birth control and feminist movements in addition to others. While undoubtedly making valuable contributions to the scholarly understanding of the eugenic milieu in the interwar years, these studies have neglected to recontextualize the sentiments of British eugenicists who did indeed view the Nazi government positively in the early years of the 1930s. This article argues that there was a significant, though not numerically sizable, faction in the British eugenics movement, though mostly outside the Eugenics Society itself, in the early 1930s that viewed the Nazi Germany as an admirable state for its implementation of eugenic principles. One of these figures was later interned by his own government for being too closely aligned with the German regime, though he argued that this affinity was driven by the quest for scientific truth rather than politics. Eugenics in Britain thus contained a greater diversity of views toward Germany than scholars have previously assumed, warranting more research into the individuals and organizations harbouring these views. (shrink)

One of the most actively discussed aspects of Keynes's thought during the last decade has been his concern with uncertainty and probability theory. As the concerns of current macroeconomic theorists have turned increasingly to the effects of expectations and uncertainty, interest has grown in the fact that Keynes was the author of A Treatise on Probability and that uncertainty plays a prominent role in Chapter 12 of The General Theory as well as in three 1937 papers in which he summarized (...) The General Theory's main point. Not surprisingly, though, there has been very little agreement in this recent discussion about exactly what the significance of Keynes's early work in probability was to his later work as an economist, or about what the roles of uncertainty and expectations are in The General Theory. (shrink)

Ronald Dworkin’s theory of equality has exerted a strong gravitational force over Canadian equality rights doctrine for more than two decades. And although Dworkin is never cited in the Supreme Court of Canada’s equality rights cases, his shadow is plainly visible in the reception of the right to ‘equal concern and respect’ in Andrews (1989), and the ‘right to moral independence’ in Law v Canada (1999).Although this paper assesses the extent to which Dworkin’s theory of equality has been received in (...) Canadian law, it also engages in debates between Dworkin and his critics that developed as Dworkin defended and modified his theory of rights and equality over the years. The debates between Dworkin and his critics are invaluable for interpreting Canadian constitutional jurisprudence, I will argue, because the Supreme Court does not always adequately justify the conceptions of equality, dignity, etc. that it incorporates into constitutional law. Indeed, it is not always evident that the Court is aware that it is choosing among alternative conceptions, rather than straightforwardly interpreting a determinate constitutional text. The payoff from a parallel study of Dworkin and the equality rights doctrine of the Supreme Court is the identification of resources from the academic debate that can be commended for the development of a more sound and stable constitutional doctrine. (shrink)

John Maynard Keynes was the most important economist of the twentieth century. He was also a philosopher who wrote on ethics and the theory of probability and was a central figure in the Bloomsbury Group of writers and artists. In this volume contributors from a wide range of disciplines offer new interpretations of Keynes's thought, explain the links between Keynes's philosophy and his economics, and place his work and Keynesianism - the economic theory, the principles of economic policy, and the (...) political philosophy - in their historical context. Chapter topics include Keynes's philosophical engagement with G. E. Moore and Franz Brentano, his correspondence, the role of his General Theory in the creation of modern macroeconomics, and the many meanings of Keynesianism. New readers will find this the most convenient, accessible guide to Keynes currently available. Advanced students and specialists will find a conspectus of recent developments in the interpretation of Keynes. (shrink)

Profiles of art education in nineteen countries around the world by citizens or longtime residents of those countries comprise the core of this book. Guidelines for the cross-cultural study of art education are presented by the editors in a general introduction and three part introductions, and also by contributing specialists. The nineteen national profiles, with accompanying examples of children's artwork, make up the largest section of the book, Part II. The three chapters in Part I review research that has identified, (...) on one hand, certain universal characteristics of children's artwork attributable to common human stages of development, and, on the other hand, certain differing and unique cultural influences. The need for further research on this distinction is emphasized. Contributors to Part I are Elliot W. Eisner, William Ives and Howard Gardner, and Marjorie and Brent Wilson. The three chapters in Part III discuss three major problems in art education: the use of museum visits, the worldwide attempt to establish valid tests of teacher and pupil proficiency in art, and the design of sound and useful cross-cultural research. Resources for such research are described. Contributors to Part III are Robert Ott and Lois Swan Jones, William Bradley, and Frances E. Anderson. Professionals and students in art education can broaden their perspective through Art in Education, while their counterparts in child development and psychology can gain insights into the creative process. Profiles: Western Europe—England,Finland, Germany, Netherlands; Eastern Europe—Hungary, Poland, Soviet Union; Middle East and South Asia Afghanistan, Egypt, India, Israel; East Asia and the Pacific Australia, China, Japan; Africa—Ghana, Nigeria, South Africa; The Americas—Brazil, United States. (shrink)

The first seven chapters of Doing without Concepts offer a perfectly reasonable view of current research on concepts. The last chapter, on which the central thesis of the book rests, provides little actual evidence that using the term impedes scientific progress. It thus fails to demonstrate that this term should be eliminated from the scientific vernacular.