Miller (1956) summarized evidence that people can remember about seven chunks in short-term memory (STM) tasks. However, that number was meant more as a rough estimate and a rhetorical device than as a real capacity limit. Others have since suggested that there is a more precise capacity limit, but that it is only three to five chunks. The present target article brings together a wide variety of data on capacity limits suggesting that the smaller capacity limit is real. Capacity limits (...) will be useful in analyses of information processing only if the boundary conditions for observing them can be carefully described. Four basic conditions in which chunks can be identified and capacity limits can accordingly be observed are: (1) when information overload limits chunks to individual stimulus items, (2) when other steps are taken specifically to block the recoding of stimulus items into larger chunks, (3) in performance discontinuities caused by the capacity limit, and (4) in various indirect effects of the capacity limit. Under these conditions, rehearsal and long-term memory cannot be used to combine stimulus items into chunks of an unknown size; nor can storage mechanisms that are not capacity-limited, such as sensory memory, allow the capacity-limited storage mechanism to be refilled during recall. A single, central capacity limit averaging about four chunks is implicated along with other, noncapacity-limited sources. The pure STM capacity limit expressed in chunks is distinguished from compound STM limits obtained when the number of separately held chunks is unclear. Reasons why pure capacity estimates fall within a narrow range are discussed and a capacity limit for the focus of attention is proposed. Key Words: attention; enumeration; information chunks; memory capacity; processing capacity; processing channels; serial recall; short-term memory; storage capacity; verbal recall; working memory capacity. (shrink)

Examina a relevância da Lei de Acesso à Informação – LAI na consolidação institucional do Ministério Público Federal - MP no Brasil. Analisa a sua a atuação durante o regime militar e no processo de redemocratização após a Constituição de 1988. Aponta a sua evolução como instituição permanente e essencial à função jurisdicional do Estado, responsável, perante o Judiciário, pela defesa da ordem jurídica e dos interesses indisponíveis da sociedade, assim como seu papel na investigação de fatos nacionais sobre os (...) perpetradores de violações aos direitos humanos. (shrink)

Lotman’s contribution to semiotic theory, anthroposemiotics, the study of artistic texts and defining the relationship between language and culture represent some of the most powerful work produced within the Tartu–Moscow School of Semiotics. The importance of translation is one of the central principles that unites all of Lotman’s work. In the following paper, we will consider Lotman’s definition of translatability in the context of (1) the definition of semiospheric internal and external boundaries and the importance of crossing these boundaries, (2) (...) the role of no fewer than two languages as a minimal unit of semiotic meaning-generation, (3) culture text-level generation of collective memory, and (4) the ever-present tension in the communication act. In our concluding section, we will offer an extended model of the communication act, based on the fundamental principles given in Jakobson, Sebeok and Lotman, in order to specify important moments of the translation process. (shrink)

Assembling the pieces : the neuroscience disciplines essential for the study of language and brain -- Building the basis : linguistic contributions to a theory of language and their relevance to the study of language and brain -- Neuroscience applications to the study of multilingualism -- Exploring the boundaries of cognitive linguistics and neurolinguistics : reimagining cross-cultural contributions -- Imaging technologies in the study of multilingualism : focus on BOLD fMRI -- Reassembling the pieces : languages and brains.

The historical reconstruction of the origins of the Neutral Theory of Molecular Evolution (NTME) has been seen purely as an extension of a long-held theoretical debate between the classical and balance schools of Population Genetics. In this perspective, the NTME is but a different interpretation of the then recently published data on high intrapopulation genetic variability. In this paper we try to show that this thesis is deficient and partially incorrect. We show that the sources for the construction and development (...) of the NTME are more varied than this traditional account. We support the Dietrich Historical Thesis, which is the view that different versions of the NTME (Kimura, and King and Jukes) show different kinds of experimental and theoretical support and coincide in recognizing the importance of the then new molecular experimental approach and of its comparative results in evolutionary biology. We stress this case to show the limits of the traditional approach in history and philosophy of science that emphasizes the theoretical activities of scientists and the theoretical characterization of disciplines. (shrink)

Stem cell tourism is a small but growing part of the thriving global medical tourism marketplace. Much stem cell research remains at the experimental stage, with clinical trials still uncommon. However, there are over 700 clinics estimated to be operating in mostly developing countries – from Costa Rica and Argentina to China, India and Russia – that have lured many patients, mostly from industrialized countries, driven by desperation and hope, which in turn continue to fuel the growth of such tourism.While (...) much research has focused on such dimensions as the promotions that allow such businesses to make their services known, media coverage, some patient research, and regulatory conditions for developing country clinics, little attention has been paid to the non-affected members of the general population, the future potential users of such services. This empirical study based on five focus group discussions with a diverse group of healthy adults in a Canadian city, explored participant views of patients who use stem cell tourism services, the likelihood they would avail themselves of such services if they were to suffer similar illnesses, and the conditions under which they might do so, and the impact that admonitions and advice from international expert bodies might have on their decisions. Our findings suggest that these healthy adults are sympathetic to the drivers of hope and desperation, and, despite cautions about research limitations, may seek such treatments themselves under similar conditions. These findings are discussed in the context of the policy and ethical issues raised by this form of medical tourism. (shrink)

How Classification Works attempts to bridge the gap between philosophy and the social sciences using as a focus some of the work of Nelson Goodman. Throughout his long career Goodman has addressed the question: are some ways of conceptualizing more natural than others? This book looks at the rightness of categories, assessing Goodman's role in modern philosophy and explaining some of his ideas on the relation between aesthetics and cognitive theory. Two papers by Nelson Goodman are included in (...) the collection and there are analyses of his work by seven leading academics in anthropology, philosophy, sociology and musicology. (shrink)

The paper tries to show that an evolutionary perspective helps us to address what is called the adaptation problem, that is, the remarkable coherence, and seemingly successful design, existing between our cognitive tools and the phenomena of the material world. It argues that a fine-grained description of the structure and function of experimental techniques—as a special type amongst evolving scientific practices—is a condition for a better understanding and, ultimately, an explanation of how adaptation among the heterogeneous elements of experimental knowledge (...) is attained. Some apparently contradictory features of techniques, such as their high context-dependency and their capabilities to reproduce and diversify outside their original contexts, are addressed with the help of the concepts of technical variation and the historical entrenchment of phenomena in techniques. In order to do so, a case-study on the construction of satellite-DNA and the evolution of nucleic acid hybridization, a research project carried out by Roy J. Britten and his colleagues in the 1960s, is presented in detail. This case illustrates the close relationship existing between the evolution of techniques and the stabilization of phenomena in experimental biology. (shrink)

The purpose of this paper is to articulate the central issues and controversies that currently dominate the study of the relationship between language and brain and, as a result, we will attempt to fundamentally redefine the way language is viewed by the neurosciences by recasting traditional linguistic definitions of human language. In order to achieve these goals, we will take into account important aspects of neuroanatomy, neurophysiology, and neurofunctionality, the role of imaging technologies in formulating specific questions for testing hypotheses (...) about language and the brain, including what these technologies can and cannot do, and a discussion of the myths about the neurological representations of human language. Our conclusions will take into account evidence on aphasias and medial temporal lobe damage that directly affects the way we understand the relationship between language, brain, and memory. (shrink)

Resumo: Neste artigo, argumentamos a favor de uma versão sofisticada do realismo científico, tendo como eixo norteador a análise do desempenho do que consideramos ser o seu elemento de defesa estratégico: o “argumento do milagre”. O realismo científico é a perspectiva comprometida com as nossas melhores teorias científicas, isto é, com a existência de entidades, processos, relações etc., observáveis ou inobserváveis, indispensáveis para explicar o seu sucesso empírico, em particular, com aqueles componentes das teorias que são cruciais para se alcançar (...) novas previsões bem-sucedidas. O argumento do milagre é um tipo de abdução ou inferência da melhor explicação e se expressa na célebre formulação de Putnam : “O realismo científico é a única filosofia que não faz do sucesso da ciência um milagre.” Analisamos e rebatemos duas importantes modalidades de argumentação antirrealista: a indução pessimista e a circularidade viciosa da inferência da melhor explicação. Acreditamos estar justificados quanto à defesa da intuição básica do realismo científico, com o apoio de uma versão fortalecida e articulada do argumento do milagre, mediante as qualificações de novidade preditiva e fecundidade teórica: a ciência é bem-sucedida em explicar e prever fenômenos, inclusive novos, porque suas melhores teorias são verdadeiras e as entidades inobserváveis postuladas por essas teorias realmente existem. Concluímos que o argumento do milagre continua sendo basilar e estratégico na defesa do realismo científico.: In this article, we argue in favor of a sophisticated version of scientific realism, based on an analysis of what we consider to be the strategic element of its defense: the “miracle argument”. Scientific realism is the perspective applicable to our best scientific theories; that is, it applies to entities, processes, and relationships, etc., whether observable or unobservable, which are indispensable for explaining the empirical success of theories, and it applies particularly to those components of the theories that are crucial to achieving new and successful forecasts. The miracle argument is a type of abduction or inference to the best explanation, and is expressed in the famous formulation of Putnam : “[Scientific] realism is the only philosophy that doesn’t make the success of the science a miracle.” We analyze and refute two important modes of antirealist argument: pessimistic induction and vicious circularity of inference to the best explanation. We believe that we are justified in defending the basic intuition of scientific realism, supported by a strengthened version of the miracle argument, together with the attributes of predictive novelty and theoretical fecundity. From this perspective, science succeeds in explaining and predicting phenomena, including new phenomena, because its best theories are true, and the unobservable entities postulated by these theories actually exist. We conclude that the miracle argument continues to be basic and strategic in the defense of scientific realism. (shrink)

In this highly original and accessible book, one of our leading philosophers of religion seeks to answer this question by analyzing the several states of mystic union as they are described and explained in the classical primary literature ...

Xenotransplantation, or the use of animal cells, tissues and organs for humans, has been promoted as an important solution to the worldwide shortage of organs. While scientific studies continue to be done to address problems of rejection and the possibility of animal-to-human virus transfer, socio-ethical and legal questions have also been raised around informed consent, life-long monitoring, animal welfare and animal rights, and appropriate regulatory practices. Many calls have also been made to consult publics before policy decisions are made. This (...) paper describes the Canadian public consultation process on xenotransplantation carried out by the Canadian Public Health Association in an arm’s length process from Health Canada, the ministry overseeing government health policy and regulation. Focusing on six citizen fora conducted around the country patterned after the citizen jury deliberative approach, the paper describes the citizen panelists’ recommendations to hold off on proceeding with clinical trials and the rationales behind this recommendation. The consultation process is discussed in the context of constructive technology assessment, a framework which argues for broader input into earlier stages of technology innovation, particularly at the technology design stage. (shrink)

Our investigation on Hilary Putnam’s internal realist perspective(internalism) traces parallels and identifies differences between Putnam’s ideasand their antipodes: metaphysical realist (externalism) and radical relativist. Ourresearch has focused upon the contemporary debate in which it is inserted, par-ticularly, upon the challenge that radical relativism to impose on contemporaryepistemology. Such challenge will not be surmounted through classical project tofind absolute certainties. The history of science to point out that theories are notnets that to catch the reality as it is in itself. But (...) this do not to imply that our viewof knowledge are only determined for contingent aspects. In this scenery are hard enterprise but it is worthy-while to take into account efforts of philosophersas Putnam to propose a via media. (shrink)

In his new foreword to this edition, Hilary Putnam forcefully rejects these nativist claims.