This paper examines the role of ethics in research with potentialapplicability to chemical and biological warfare. It focuses uponbiological warfare research, and examines the ethical dilemmas faced bythose working with dual-use potential technologies. It discusses thenormative, legal and ethical prohibitions against participation inchemical and biological warfare programmes from a Western perspective.It examines the motivations of individuals participating in CBW researchand concludes with recommendations for increasing awareness aboutethical and normative prohibitions. An appendix lists the results of asurvey of ethical codes in (...) relevant scientific disciplines conducted viathe Internet. (shrink)

Platonism is the most pervasive philosophy of mathematics. Indeed, it can be argued that an inarticulate, half-conscious Platonism is nearly universal among mathematicians. The basic idea is that mathematical entities exist outside space and time, outside thought and matter, in an abstract realm. In the more eloquent words of Edward Everett, a distinguished nineteenth-century American scholar, "in pure mathematics we contemplate absolute truths which existed in the divine mind before the morning stars sang together, and which will continue to exist (...) there when the last of their radiant host shall have fallen from heaven." In What is Mathematics, Really?, renowned mathematician Rueben Hersh takes these eloquent words and this pervasive philosophy to task, in a subversive attack on traditional philosophies of mathematics, most notably, Platonism and formalism. Virtually all philosophers of mathematics treat it as isolated, timeless, ahistorical, inhuman. Hersh argues the contrary, that mathematics must be understood as a human activity, a social phenomenon, part of human culture, historically evolved, and intelligible only in a social context. Mathematical objects are created by humans, not arbitrarily, but from activity with existing mathematical objects, and from the needs of science and daily life. Hersh pulls the screen back to reveal mathematics as seen by professionals, debunking many mathematical myths, and demonstrating how the "humanist" idea of the nature of mathematics more closely resembles how mathematicians actually work. At the heart of the book is a fascinating historical account of the mainstream of philosophy--ranging from Pythagoras, Plato, Descartes, Spinoza, and Kant, to Bertrand Russell, David Hilbert, Rudolph Carnap, and Willard V.O. Quine--followed by the mavericks who saw mathematics as a human artifact, including Aristotle, Locke, Hume, Mill, Peirce, Dewey, and Lakatos. In his epilogue, Hersh reveals that this is no mere armchair debate, of little consequence to the outside world. He contends that Platonism and elitism fit well together, that Platonism in fact is used to justify the claim that "some people just can't learn math." The humanist philosophy, on the other hand, links mathematics with geople, with society, and with history. It fits with liberal anti-elitism and its historical striving for universal literacy, universal higher education, and universal access to knowledge and culture. Thus Hersh's argument has educational and political ramifications. Written by the co-author of The Mathematical Experience, which won the American Book Award in 1983, this volume reflects an insider's view of mathematical life, based on twenty years of doing research on advanced mathematical problems, thirty-five years of teaching graduates and undergraduates, and many long hours of listening, talking to, and reading philosophers. A clearly written and highly iconoclastic book, it is sure to be hotly debated by anyone with a passionate interest in mathematics or the philosophy of science. (shrink)

"This new collection of essays edited by Reuben Hersh contains frank facts and opinions from leading mathematicians, philosophers, sociologists, cognitive ...

It is explained that, in the sense of the sociologist Erving Goffman, mathematics has a front and a back. Four pervasive myths about mathematics are stated. Acceptance of these myths is related to whether one is located in the front or the back.

There are two distinct meanings to ‘mathematical proof’. The connection between them is an unsolved problem. The first step in attacking it is noticing that it is an unsolved problem.

This is a response to Dr Charlotte Rosalind Blease's paper ‘Electroconvulsive Therapy (ECT), the Placebo Effect and Informed Consent’, written by Julie K. Hersh who has had ECT. Hersh argues that placebo effect is impossible to prove without endangering the lives of participants in the study. In addition, informing potential ECT patients of unproven placebo effect could discourage patients from using a procedure that from experience has proven highly effective.

This paper investigates four questions related to ethical issues associated with the involvement of engineers and scientists in 'military work', including the influence of ethical values and beliefs, the role of gendered perspectives and moves beyond the purely technical. It fits strongly into a human (and planet)-centred systems perspective and extends my previous AI and Society papers on othering and narrative ethics, and ethics and social responsibility. It has two main contributions. The first involves an analysis of the literature through (...) the application of different ethical theories and the application of gendered analysis to discussion of masculinities in engineering and the military. The second is a survey of scientists and engineers to investigate their opinions and experiences. The conclusions draw together the results of these two contributions to provide preliminary responses to the four questions and include a series of recommendations covering education and training, ethical approval of work not involving human participants or animals, the need for organisational support, approaches covering wider perspectives and the encouragement of individual ethical commitment. (shrink)

The paper discusses the limitations of engineering ethics as implemented in practice, with a focus on the fact that engineering and other activities are carried out without any consideration of whether the activities are themselves ethical, and on the gap between legality and ethics. This leads to the following three central ideas of the paper. The first is the need for engineers to both be aware of and critique their own values and be able to widen their perspective to that (...) of the ‘other’, i.e., marginalised and minority groups and the environment. This understanding of the ‘other’ and values is also applied to the discussion of ethical issues relating to minority world (‘developed’) country engineers working in majority world (‘developing’) countries. The second central idea is the fact that structural and contextual factors in the form of barriers and enablers affect ethical values and practices. Individuals are not necessarily unethical in themselves, but the context and organisational ethos may present barriers to ethical behaviour and encourage the development of unethical values. These barriers and enablers are investigated through a pilot survey. The third central idea is the relationship between individual and collective responsibility and the need for support to enable engineers to think and behave ethically. (shrink)

The paper presents a new seven-step methodology for using narrative ethics and two case studies illustrating its application. A brief discussion of the importance of ethics to engineers and the need to consider outcomes and macroethics introduce the paper. This is followed by overviews of the literature on narrative ethics, the ethics of care, and virtue ethics and moral exemplars. The ethics of care and virtue ethics are included due to their relationship to narrative and the fact they are probably (...) less known to many engineers than other types of ethical theories. The paper also considers the important issues of culture, diversity and the ‘other’ and the need for support and collective responsibility. Understanding diversity and the ‘other’ are very important for engineers for a number of reasons, including the need to design technologies, goods and services for people who are not engineers and who are also different from them on other characteristics, such as gender, race and disability. Although ethical behaviour is often portrayed as an individual responsibility, it is much easier to behave ethically in a context which supports and encourages ethical behaviour. Collective action is frequently more effective than individual action and can prevent victimisation. (shrink)

“What is the structure of thought?” is as central a question as any in cognitive science. A classic answer to this question has appealed to a Language of Thought (LoT). We point to emerging research from disparate branches of the field that supports the LoT hypothesis, but also uncovers diversity in LoTs across cognitive systems, stages of development, and species. Our letter formulates open research questions for cognitive science concerning the varieties of rules and representations that underwrite various LoT-based systems (...) and how these variations can help researchers taxonomize cognitive systems. (shrink)

Çalışma İslam hukukunun çevre ve toplumların sahip olduğu tabi kay-nakları koruma konusunda öngördüğü düzenlemelerin fıkhi ve iktisadi boyutunu açıklamayı hedef almaktadır. Araştırmamız esnasında inceledeğimiz temel dini metinler ve bunlar arasında yaptığımız karşılaştırmalar bize İslam hukukunun çevreyi ve tabi kaynakları koruma ve geliştirmeye yönelik düzenlemelere sahip olduğunu ortaya koymaktadır. Bu çalışma gösteriyor ki İslam'ın ilkeleri ve şeriat çevreye önem vermeye, özen göstermeye, tüketimde orta yolu gözetmeye ve israf yapmamaya davet etmektedir. Aynı şekilde kalkınmaya ve yeryüzünü imar etmeye ve ekonomik yararlarını gerçekleştirecek (...) şekilde ümmetin kaynaklarını korumaya da davet etmektedir. (shrink)

In my article on proof [Philosophia Mathematica (3) 5 (1997), 153—165], I suggested or intimated that computer proofs of mathematical theorems had been found only for relatively simple or trivial theorems. I am obligated to Martin Davis and R. S. Boyer for the information that this suggestion or intimation is incorrect. For instance, a machine proof of quadratic reciprocity was published by D. M. Russinoff in J. Automated Reasoning 8 (1992), 3–21. A machine proof of the unsolvability of the halting (...) problem has been published by R S. Boyer and J. S. Moore. This and many other examples are presented in Chapter 1 of their book, A Computational Logic Handbook, Academic Press, 1990. A second edition of this book is expected shortly. (shrink)

Ensuring that their work has a positive influence on society is a responsibility and a privilege for engineers, but also a considerable challenge. This book addresses the ways in which engineers meet this challenge, working from the assumption that for a project to be truly ethical both the undertaking itself and its implementation must be ethically sound. The contributors discuss varied topics from an international and interdisciplinary perspective, including: · robot ethics; · outer space; · international development; · internet privacy (...) and security; · green branding; · arms conversion; · green employment; and · deliberate misinformation about climate change Important questions are answered, such as: · what is meant by engineering ethics and its practical implications; · how decisions made by engineers in their working lives make an impact at the global as well as the local level; and · what ethics-related questions should be asked before making such decisions. Engineering Ethics, International and Environmental Stability will be a valuable resource for practising and student engineers as well as all who are interested in professional ethics, especially as it relates to engineering. Researchers and policy makers concerned with the effects of engineering decisions on environmental sustainability and international stability will find this book to be of special interest. (shrink)

Part IV. About the author -- An amusing elementary example -- Annotated research bibliography -- Curriculum vitae -- List of articles -- Index -- Back Cover.

Open peer commentary on the target article “Who Conceives of Society?” by Ernst von Glasersfeld. First paragraph: Ernst von Glasersfeld seems to say to social constructivists, “You attribute reality to society, but your society is just another construct, all you know is just the bits of light and shadow and color that your visual system provides to you.” Now, “society” is just a big word for “other people.” I can give to this text of von Glasersfeld’s either a short answer (...) or a long one. (shrink)

John Rawls, in his Political Liberalism (1993), claims that his justice-as-fairness prescription for liberal democracy does not require its citizens to harbor doubts regarding the truth claims of their religious, philosophical, or moral comprehensive doctrines. Citizens, he says, need not be “hesitant or uncertain, much less skeptical, about [their] own beliefs.” This claim is necessary for the protection of liberty of conscience, a “primary goods”, but it is also necessary to his description of his scheme as a “reasonable utopia” since (...) citizens are not likely to agree to a demand for skepticism. The problem arises for Rawls’s scheme when he says that for a citizen to participate in this political process she must be “reasonable” and that to qualify as “reasonable”, she must acknowledge what Rawls calls the “burdens of judgment” (that is, “limits on what can be reasonably justified to others”). This acknowledgment allows her not only to qualify as reasonable herself, but forces her to concede the reasonableness of other citizens who hold different truth claims from her own. Rawls’s fourth “burden of conscience” is an admission that the truth claims of all citizens, including her own, are conditioned by what Rawls calls her “total experience”. Unless she is willing to make the admission that her truth claims are contingent, a citizen cannot qualify as “reasonable” and is excluded from the conversation of public reason whose purpose is to produce a consensus on justice principles. This leaves his scheme in the category of “unreasonable utopias”. (shrink)

This paper discusses the wide diversity of responses by different countries to COVID-19.

Integrative explanations of why obesity is more prevalent in some sectors of the human population than others are lacking. Here, we outline and evaluate one candidate explanation, the insurance hypothesis. The IH is rooted in adaptive evolutionary thinking: The function of storing fat is to provide a buffer against shortfall in the food supply. Thus, individuals should store more fat when they receive cues that access to food is uncertain. Applied to humans, this implies that an important proximate driver of (...) obesity should be food insecurity rather than food abundance per se. We integrate several distinct lines of theory and evidence that bear on this hypothesis. We present a theoretical model that shows it is optimal to store more fat when food access is uncertain, and we review the experimental literature from non-human animals showing that fat reserves increase when access to food is restricted. We provide a meta-analysis of 125 epidemiological studies of the association between perceived food insecurity and high body weight in humans. There is a robust positive association, but it is restricted to adult women in high-income countries. We explore why this could be in light of the IH and our theoretical model. We conclude that although the IH alone cannot explain the distribution of obesity in the human population, it may represent a very important component of a pluralistic explanation. We also discuss insights it may offer into the developmental origins of obesity, dieting-induced weight gain, and anorexia nervosa. (shrink)

Distributional semantic models (DSMs) are a primary method for distilling semantic information from corpora. However, a key question remains: What types of semantic relations among words do DSMs detect? Prior work typically has addressed this question using limited human data that are restricted to semantic similarity and/or general semantic relatedness. We tested eight DSMs that are popular in current cognitive and psycholinguistic research (positive pointwise mutual information; global vectors; and three variations each of Skip-gram and continuous bag of words (CBOW) (...) using word, context, and mean embeddings) on a theoretically motivated, rich set of semantic relations involving words from multiple syntactic classes and spanning the abstract–concrete continuum (19 sets of ratings). We found that, overall, the DSMs are best at capturing overall semantic similarity and also can capture verb–noun thematic role relations and noun–noun event-based relations that play important roles in sentence comprehension. Interestingly, Skip-gram and CBOW performed the best in terms of capturing similarity, whereas GloVe dominated the thematic role and event-based relations. We discuss the theoretical and practical implications of our results, make recommendations for users of these models, and demonstrate significant differences in model performance on event-based relations. (shrink)

The presence of fetal cells has been associated with both positive and negative effects on maternal health. These paradoxical effects may be due to the fact that maternal and offspring fitness interests are aligned in certain domains and conflicting in others, which may have led to the evolution of fetal microchimeric phenotypes that can manipulate maternal tissues. We use cooperation and conflict theory to generate testable predictions about domains in which fetal microchimerism may enhance maternal health and those in which (...) it may be detrimental. This framework suggests that fetal cells may function both to contribute to maternal somatic maintenance (e.g. wound healing) and to manipulate maternal physiology to enhance resource transmission to offspring (e.g. enhancing milk production). In this review, we use an evolutionary framework to make testable predictions about the role of fetal microchimerism in lactation, thyroid function, autoimmune disease, cancer and maternal emotional, and psychological health.Also watch the Video Abstract. (shrink)

Research on language processing has shown that the disruption of conceptual integration gives rise to specific patterns of event-related brain potentials —N400 and P600 effects. Here, we report similar ERP effects when adults performed cross-domain conceptual integration of analogous semantic and mathematical relations. In a problem-solving task, when participants generated labeled answers to semantically aligned and misaligned arithmetic problems, the second object label in misaligned problems yielded an N400 effect for addition problems. In a verification task, when participants judged arithmetically (...) correct but semantically misaligned problem sentences to be “unacceptable,” the second object label in misaligned sentences elicited a P600 effect. Thus, depending on task constraints, misaligned problems can show either of two ERP signatures of conceptual disruption. These results show that well-educated adults can integrate mathematical and semantic relations on the rapid timescale of within-domain ERP effects by a process akin to analogical mapping. (shrink)

This study examines steroid production in fathers watching their children compete, extending previous research of vicarious success or failure on men’s hormone levels. Salivary testosterone and cortisol levels were measured in 18 fathers watching their children play in a soccer tournament. Participants completed a survey about the game and provided demographic information. Fathers with higher pregame testosterone levels were more likely to report that referees were biased against their children’s teams, and pre- to postgame testosterone elevation was predicted by watching (...) sons compete rather than daughters as well as perceptions of unfair officiating. Pregame cortisol was not associated with pregame testosterone or with perceived officiating bias, but cortisol did fluctuate synergistically with testosterone during spectator competition. Although fathers showed no consistent testosterone change in response to winning or losing, pregame testosterone may mediate steroid hormone reactivity to other aspects of their children’s competition. (shrink)

The abrupt shift in learning mode demands students to adjust from the comfort of their homes, as well as the challenges of face-to-face learning. As a result, as the pandemic fades, institutions in the Philippines have begun to reopen their doors to students. Hence, this study employed a correlational design to investigate the relationship between procrastination and academic burnout among 150 first-year college students in a state university. Based on the statistical analysis, the r coefficient of 0.67 indicates a moderate (...) positive correlation between the variables. The p-value of 0.00, which is less than 0.05, leads to the decision to reject the null hypothesis. Hence, a significant relationship exists between procrastination and academic burnout among first-year college students. Implications and recommendations were discussed in the study. (shrink)

BackgroundAn editorial expression of concern (EEoC) is issued by editors or publishers to draw attention to potential problems in a publication, without itself constituting a retraction or correction.MethodsWe searched PubMed, PubMed Central (PMC), and Google Scholar to identify EEoCs issued for publications in PubMed and PMC up to 22 August 2016. We also searched the archives of the Retraction Watch blog, some journal and publisher websites, and studies of EEoCs. In addition, we searched for retractions of EEoCs and affected articles (...) in PubMed up to 8 December 2016. We analyzed overall historical trends, as well as reported reasons and subsequent editorial actions related to EEoCs issued between August 2014 and August 2016.ResultsAfter screening 5076 records, we identified 230 EEoCs that affect 300 publications indexed in PubMed, the earliest issued in 1985. Half of the primary EEoCs were issued between 2014 and 2016 (52%). We found evidence of some EEoCs that had been removed by the publisher without leaving a record, and some were not submitted for PubMed or PMC indexing. A minority of publications affected by EEoCs had been retracted by early December 2016 (25%). For the subset of 92 EEoCs issued between August 2014 and August 2016, affecting 99 publications, the rate of retraction was similar (29%). The majority of EEoCs were issued because of concerns with validity of data, methods, or interpretation of the publication (68%), and 31% of cases remained open. Issues with images were raised in 40% of affected publications. Ongoing monitoring after the study identified another 17 EEoCs to year’s end in 2016, increasing the number of EEoCs to 247 and publications in PubMed known to be affected by EEoCs to 320 at the end of 2016.ConclusionsEEoCs have been rare publishing events in the biomedical literature, but their use has been increasing. Most have not led to retractions, and many remain unresolved. Lack of prominence and inconsistencies in management of EEoCs reduce the ability of these notices to alert the scientific community to potentially serious problems in publications. EEoCs will be made identifiable in PubMed in 2017. (shrink)

Background Respect is essential to providing high quality healthcare, particularly for groups that are historically marginalized and stigmatized. While ethical principles taught to health professionals focus on patient autonomy as the object of respect for persons, limited studies explore patients’ views of respect. The purpose of this study was to explore the perspectives of a multiculturally diverse group of low-income women living with HIV (WLH) regarding their experience of respect from their medical physicians. Methods We analyzed 57 semi-structured interviews conducted (...) at HIV case management sites in South Florida as part of a larger qualitative study that explored practices facilitating retention and adherence in care. Women were eligible to participate if they identified as African American (n = 28), Hispanic/Latina (n = 22), or Haitian (n = 7). They were asked to describe instances when they were treated with respect by their medical physicians. Interviews were conducted by a fluent research interviewer in either English, Spanish, or Haitian Creole, depending on participant’s language preference. Transcripts were translated, back-translated and reviewed in entirety for any statements or comments about “respect.” After independent coding by 3 investigators, we used a consensual thematic analysis approach to determine themes. Results Results from this study grouped into two overarching classifications: respect manifested in physicians’ orientation towards the patient (i.e., interpersonal behaviors in interactions) and respect in medical professionalism (i.e., clinic procedures and practices). Four main themes emerged regarding respect in provider’s orientation towards the patient: being treated as a person, treated as an equal, treated without blame or prejudice, and treated with concern/emotional support. Two main themes emerged regarding respect as evidenced in medical professionalism: physician availability and considerations of privacy. Conclusions Findings suggest a more robust conception of what ‘respect for persons’ entails in medical ethics for a diverse group of low-income women living with HIV. Findings have implications for broadening areas of focus of future bioethics education, training, and research to include components of interpersonal relationship development, communication, and clinic procedures. We suggest these areas of training may increase respectful medical care experiences and potentially serve to influence persistent and known social and structural determinants of health through provider interactions and health care delivery. (shrink)

Historians and economists will find here what their fields have in common - the movement since the 1950s known variously as 'cliometrics', 'economic history', or 'historical economics'. A leading figure in the movement, Donald McCloskey, has compiled, with the help of George Hersh and a panel of distinguished advisors, a highly comprehensive bibliography of historical economics covering the period up until 1980. The book will be useful to all economic historians, as well as quantitative historians, applied economists, historical demographers, (...) business historians, national income accountants, and social historians. (shrink)

Bioethics conjures images of dramatic healthcare challenges, yet everyday clinical ethics issues unfold regularly. Without sufficient ethical awareness and a relevant working skillset, clinicians can feel ill-equipped to respond to the ethical dimensions of everyday care. Bioethicists were interviewed to identify the essential skills associated with everyday clinical ethics and to identify educational case scenarios to illustrate everyday clinical ethics. Individual, semi-structured interviews were conducted with a convenience sample of bioethicists. Bioethicists were asked: (1) What are the essential skills required (...) for everyday clinical ethics? And (2) What are potential educational case scenarios to illustrate and teach everyday clinical ethics? Participant interviews were analyzed using qualitative content analysis. Twenty-five (25) bioethicists completed interviews (64% female; mean 14.76 years bioethics experience; 80% white). Five categories of general skills and three categories of ethics-specific skills essential for everyday clinical ethics were identified. General skills included: (1) Awareness of Core Values and Self-Reflective Capacity; (2) Perspective-Taking and Empathic Presence; (3) Communication and Relational Skills; (4) Cultural Humility and Respect; and (5) Organizational Understanding and Know-How. Ethics-specific skills included: (1) Ethical Awareness; (2) Ethical Knowledge and Literacy; and (3) Ethical Analysis and Interaction. Collectively, these skills comprise a Toolbox of Everyday Clinical Ethics Skills. Educational case scenarios were identified to promote everyday ethics. Bioethicists identified skills essential to everyday clinical ethics. Educational case scenarios were identified for the purpose of promoting proficiency in this domain. Future research could explore the impact of integrating educational case scenarios on clinicians’ ethical competencies. (shrink)

The production of complex sequences like music or speech requires the rapid and temporally precise production of events (e.g., notes and chords), often at fast rates. Memory retrieval in these circumstances may rely on the simultaneous activation of both the current event and the surrounding context (Lashley, 1951). We describe an extension to a model of incremental retrieval in sequence production (Palmer & Pfordresher, 2003) that incorporates this logic to predict overall error rates and speed—accuracy trade-offs, as well as types (...) of serial ordering errors. The model—assumes that retrieval of the current event is influenced by activations of surrounding events. Activations of surrounding events increase over time, such that both the accessibility of distant events and overall accuracy increases at slower production rates. The model's predictions were tested in an experiment in which pianists performed unfamiliar music at 8 different tempi. Model fits to speed—accuracy data and to serial ordering errors support model predictions. Parameter fits to individual data further suggest that working memory contributes to the retrieval of serial order and overall accuracy is influenced in addition by motor dexterity and domain-specific skill. (shrink)

This article establishes an analysis of the first contributions and the importance of the Critical and Positivist theories of accounting in Latin America over the years, through the study of scientific articles by recognized accounting experts from different countries on the theories.. Also, carry out a bibliographic examination of criticism and positivism applied to accounting, resulting in the correlation of concepts focused on accounting in Latin America. The type of research is descriptive with a qualitative approach with the purpose of (...) developing a discussion of the Critical and Positivist theories of accounting in Latin America. Obtaining a greater scope to understand that this social science is immersed in two currents that are based on the fact that knowledge is obtained through practice and can be verified through scientific methods, establishing the importance of understanding the contributions that the critical and positivist theory in the field of accounting science. (shrink)

Background: In 2006, the Centers for Disease Control and Prevention (CDC) recommended three changes to HIV testing methods in US healthcare settings: (1) an opt-out approach, (2) removal of separate signed consent, and (3) optional HIV prevention counseling. These recommendations led to a public debate about their moral acceptability. Methods: We interviewed 25 members from the fields of US HIV advocacy, care, policy, and research about the ethical merits and demerits of the three changes to HIV testing methods. We performed (...) a qualitative analysis of the participant responses in the interviews and summarized the major themes. Results: In general, arguments in favor of the methods were based upon their ultimate contribution to increasing HIV testing and permitting the consequent benefits of identifying those who are HIV infected and linking them to further care. Conclusions: The prevailing theme of ethical concern focused on suspicions that the methods might not be properly implemented, and that further safeguards might be needed. (shrink)

We report on rapid perceptual learning of intonation contour categories in adults and 9- to 11-year-old children. Intonation contours are temporally extended patterns, whose perception requires temporal integration and therefore poses significant working memory challenges. Both children and adults form relatively abstract representations of intonation contours: Previously encountered and novel exemplars are categorized together equally often, as long as distance from the prototype is controlled. However, age-related differences in categorization performance also exist. Given the same experience, adults form narrower categories (...) than children. In addition, adults pay more attention to the end of the contour, while children appear to pay equal attention to the beginning and the end. The age range we examine appears to capture the tail-end of the developmental trajectory for learning intonation contour categories: There is a continuous effect of age on category breadth within the child group, but the oldest children are adult-like. (shrink)