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Background Knowledge (background + knowledge)
Selected AbstractsSome Hypotheses on the Nature of Difficulty and Ease in Second Language Reading: An Application of Schema TheoryFOREIGN LANGUAGE ANNALS, Issue 6 2000Philip C. Hauptman A traditional view of difficulty/ease is explained as consisting of two factors: (1) Language (grammar and vocabulary) and (2) Text Length. A modern view of difficulty/ease is then proposed via four hypotheses: (1) The first Primary Ease Factor in L2 reading is background knowledge; (2) Signalling becomes the Primary Ease Factor in L2 reading when background knowledge is not useful for accessing content schemata; (3) Other factors being equal, the degree of signalling determines the degree of accessibility of a text for the L2 reader; and (4) Other factors being equal, Language, Discourse, and Length are of secondary importance , after Background Knowledge and Signalling , for accessing a text by L2 readers. [source] Knowledge, Attitudes, Beliefs, and Personal Practices Regarding Colorectal Cancer Screening Among Health Care Professionals in Rural Colorado: A Pilot SurveyTHE JOURNAL OF RURAL HEALTH, Issue 3 2009Sun Hee Rim MPH ABSTRACT:,Purpose: This study reports the baseline knowledge, attitudes, beliefs, and personal practices of health care professionals regarding colorectal cancer (CRC) screening in the High Plains Research Network (HPRN) of rural Colorado prior to a community-based educational intervention. It also examines the association between health care staff members' knowledge, attitudes, beliefs, and personal practices for CRC screening and patient screening levels by practice. Methods: Surveys were mailed to health care professionals in the HPRN. Participating clinics (n = 21) distributed patient surveys on CRC screening to persons aged ,50 for a 2-week period in 2006. Results: The survey response rate was 81% for providers (n = 46) and 90% for nursing staff (n = 63). Only 54% of health care professionals knew CRC is a leading cause of cancer deaths. When surveyed on their attitudes toward colon cancer, 92%"strongly agreed" or "agreed" that colon cancer is preventable. About 99% (n = 107) of providers and nurses "strongly agreed" or "agreed" that testing could identify problems before colon cancer starts. Most health care professionals (61%) aged ,50 years had previously been tested and were up-to-date (52%) with screening. Provider knowledge was significantly associated with higher patient screening (P = .02), but provider attitudes and beliefs were not. Moreover, personal screening practices of health care professionals did not correlate with more patients screened. Conclusion: Background knowledge of CRC among HPRN health care professionals could be improved. The results of this pilot study may help focus effective approaches such as increasing provider knowledge to enhance CRC screening in the relevant population. [source] Corroboration versus "Strongest Evidence"CLADISTICS, Issue 4 2000James. Background knowledge comprises accepted (well-corroborated) theories and results. Such theories are taken to be true for the purpose of interpreting evidence when assessing the corroboration of a hypothesis currently in question. Accordingly, background knowledge does not properly include rejected theories, false assumptions, or null models. In particular, regarding a model of random character distribution as "background knowledge" would rule out corroboration of phylogenetic hypotheses, since it would make character data irrelevant to inferring phylogeny. The presence of homoplasy is not grounds for treating characters as if they were randomly distributed, since characters can show strong phylogenetic structure even when they show homoplasy. This means that clique (compatibility) analysis is unjustified, since that method depends crucially on the assumption that characters showing any homoplasy at all are unrelated to phylogeny. Although likelihood does not measure corroboration, corroboration is closely connected to likelihood: for given evidence and background, the most likely trees are also best corroborated. Most parsimonious trees are best corroborated; the apparent clash between parsimony and likelihood is an artifact of the use of unrealistic models in most "maximum likelihood" methods. [source] Teaching of neuroepidemiology in Europe: time for actionEUROPEAN JOURNAL OF NEUROLOGY, Issue 12 2004V. Feigin Many epidemiological and clinical studies in Europe, especially in Eastern Europe and countries in transition, are of poor methodological quality because of lack of background knowledge in clinical epidemiology methods and study designs. The only way to improve the quality of epidemiological studies is to provide adequate undergraduate and/or postgraduate education for the health professionals and allied health professions. To facilitate this process, the European Federation of Neurological Societies (EFNS) Task Force on teaching of clinical epidemiology in Europe was set up in October 2000. Based on analyses of the current teaching and research activities in neuroepidemiology in Europe, this paper describes the Task Force recommendations aimed to improve these activities. [source] An Investigation of Reading Strategies Applied by American Learners of Chinese as a Foreign LanguageFOREIGN LANGUAGE ANNALS, Issue 4 2008Li-Chun Lee-Thompson Assistant ProfessorArticle first published online: 19 MAR 200 Abstract: Minimal research has been conducted in reading Chinese as a second/ foreign language (CSI/CFL). In an effort to further the understanding of the reading process, this study, utilizing think aloud and retelling procedures, focuses on the identification of strategies that American university students applied to read Chinese texts (narrative and argumentative), and the difficulties encountered when processing texts for meaning. Also it examines whether Bernhardt's constructivist model can account for the reading process of the CFL learners at the intermediate proficiency level. The results show that the CFL readers employed bottom-up and top-down processing strategies, that their difficulties were pertinent to vocabulary, orthography, grammar, and background knowledge, and that Bernhardt's reading model could account for the reading process of CFL learners with minor modification. [source] Some Hypotheses on the Nature of Difficulty and Ease in Second Language Reading: An Application of Schema TheoryFOREIGN LANGUAGE ANNALS, Issue 6 2000Philip C. Hauptman A traditional view of difficulty/ease is explained as consisting of two factors: (1) Language (grammar and vocabulary) and (2) Text Length. A modern view of difficulty/ease is then proposed via four hypotheses: (1) The first Primary Ease Factor in L2 reading is background knowledge; (2) Signalling becomes the Primary Ease Factor in L2 reading when background knowledge is not useful for accessing content schemata; (3) Other factors being equal, the degree of signalling determines the degree of accessibility of a text for the L2 reader; and (4) Other factors being equal, Language, Discourse, and Length are of secondary importance , after Background Knowledge and Signalling , for accessing a text by L2 readers. [source] Assessing early warning signals of currency crises: a fuzzy clustering approachINTELLIGENT SYSTEMS IN ACCOUNTING, FINANCE & MANAGEMENT, Issue 4 2006Shuhua Liu In the period of 1990s alone, four waves of financial crises occurred around the world. The repeated occurrence of financial crises stimulated a large number of theoretical and empirical studies on the phenomena, in particular studies on the determinants of or early warning signals of financial crises. Nonetheless, the different studies of early warning systems have achieved mixed results and there remains much room for further investigation. Since, so far, the empirical studies have focused on conventional economic modelling methods such as simplified probabilistic models and regression models, in this study we examine whether new insights can be gained from the application of the fuzzy clustering method. The theories of fuzzy sets and fuzzy logic offer us the means to deal with uncertainties inherent in a wide variety of tasks, especially when the uncertainty is not the result of randomness but the result of unknown factors and relationships that are difficult to explain. They also provide us with the instruments to treat vague and imprecise linguistic values and to model nonlinear relationships. This paper presents empirical results from analysing the Finnish currency crisis in 1992 using the fuzzy C-means clustering method. We first provide the relevant background knowledge and introduce the fuzzy clustering method. We then show how the use of fuzzy C-means method can help us to identify the critical levels of important economic indicators for predicting of financial crises. Copyright © 2007 John Wiley & Sons, Ltd. [source] Assessment of visibility of facial wrinkle reduction by various types of observersINTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Issue 3 2004J. H. D. M. Westerink The prime objective of many facial wrinkle-reduction treatments is to achieve visible improvement. The visibility of before/after treatment differences is therefore often part of the efficacy assessment. This paper investigates whether the background knowledge of the people acting as observers in such assessments has an impact on the results, e.g., the subjects themselves are familiar with their faces, skin professionals have much experience in judging skin quality, and thus both might be more sensitive to small changes. In a clinical study, 44 female subjects were regularly treated during a period of 12 weeks with one of three wrinkle-reduction treatments: K, L and M (placebo). Photographs were taken before treatment and after 6 and 12 weeks. Three different types of observers judged the photographs: ,Observer type I: Twenty-four lay observers were given the 0- and 6-week and the 0- and 12-week pairs of photographs of all subjects to indicate the one with the least wrinkles in a two-alternative forced-choice procedure; ,Observer type II: The subjects themselves were given the 0- and 6-week and the 0- and 12-week pairs of their own photographs (eight replications) to indicate the photograph with the least wrinkles (two-alternative forced-choice); ,Observer type III: A trained panel of skin professionals (n = 3) each gave a 9-point Fitzpatrick wrinkle-severity score for all individual 0- and 12-week photographs. It was found that the lay observers perceived the same differences as the subjects themselves: significant improvements after 12 weeks for treatment K (P < 0.0005 and P = 0.005, respectively). No visible effects were seen for treatments L and M, but, most importantly, a significant difference between treatments K and M (placebo) (P = 0.015 and P = 0.01 for independent observers and the subjects themselves, respectively). The trained panel also identified this difference between K and M (P = 0.013) in favor of K, but here it was due to a significant deterioration over time of the ,placebo-treated' wrinkles (M, P = 0.03). Thus, in conclusion, no indications were found that extra knowledge , in the form of familiarity with the own face or in the form of professional training , results in the identification of more treatments that show significantly visible wrinkle reduction. [source] Flexible constraints for regularization in learning from dataINTERNATIONAL JOURNAL OF INTELLIGENT SYSTEMS, Issue 6 2004Eyke Hüllermeier By its very nature, inductive inference performed by machine learning methods mainly is data driven. Still, the incorporation of background knowledge,if available,can help to make inductive inference more efficient and to improve the quality of induced models. Fuzzy set,based modeling techniques provide a convenient tool for making expert knowledge accessible to computational methods. In this article, we exploit such techniques within the context of the regularization (penalization) framework of inductive learning. The basic idea is to express knowledge about an underlying data-generating process in terms of flexible constraints and to penalize those models violating these constraints. An optimal model is one that achieves an optimal trade-off between fitting the data and satisfying the constraints. © 2004 Wiley Periodicals, Inc. [source] Microarray data classification using inductive logic programming and gene ontology background informationJOURNAL OF CHEMOMETRICS, Issue 5 2010Einar Ryeng Abstract There exists many databases containing information on genes that are useful for background information in machine learning analysis of microarray data. The gene ontology and gene ontology annotation projects are among the most comprehensive of these. We demonstrate how inductive logic programming (ILP) can be used to build classification rules for microarray data which naturally incorporates the gene ontology and annotations to it as background knowledge without removing the inherent graph structure of the ontology. The ILP rules generated are parsimonious and easy to interpret. Copyright © 2010 John Wiley & Sons, Ltd. [source] Fishes as models in studies of sexual selection and parental careJOURNAL OF FISH BIOLOGY, Issue 2003T. Amundsen Fishes are by far the most diverse group of vertebrates. This fact is in no way, however, reflected in their use as model organisms for understanding sexual selection or parental care. Why is this so? Is it because fishes are actually poor models? The usefulness of fishes as models for sexual selection and parental care is discussed by emphasizing some problems inherent in fish studies, along with a number of reasons why fishes are indeed excellently suited. The pros and cons of fishes as models are discussed mainly by comparison with birds, the most popular model organisms in animal behaviour. Difficulties include a lack of background knowledge for many species, and the problems of marking and observing fishes in their natural environment. Positive attributes include the diversity of lifestyles among fishes, and the ease with which they can be studied experimentally in the laboratory. How useful fish models can be is briefly illustrated by the impressive and broadly relevant advances derived from studies of guppies Poecilia reticulata and three-spined sticklebacks Gasterosteus aculeatus. A selection of topics is highlighted where fish studies have either advanced or could greatly enhance, the understanding of processes fundamental to animal reproductive dynamics. Such topics include sex role dynamics, the evolution of female ornamentation and mate choice copying. Finally, a number of potential pitfalls in the future use of fish as models for sexual selection and parental care are discussed. Researchers interested in these issues are recommended to make much more extensive use of fish models, but also to adopt a wider range of models among fishes. [source] Folk theories of "inquiry:" How preservice teachers reproduce the discourse and practices of an atheoretical scientific methodJOURNAL OF RESEARCH IN SCIENCE TEACHING, Issue 5 2004Mark Windschitl Despite the ubiquity of the term "inquiry" in science education literature, little is known about how teachers conceptualize inquiry, how these conceptions are formed and reinforced, how they relate to work done by scientists, and if these ideas about inquiry are translated into classroom practice. This is a multicase study in which 14 preservice secondary science teachers developed their own empirical investigations,from formulating questions to defending results in front of peers. Findings indicate that participants shared a tacit framework of what it means to "do science" which shaped their investigations and influenced reflections on their inquiries. Some facets of the participants' shared model were congruent with authentic inquiry; however, the most consistent assumptions were misrepresentations of fundamental aspects of science: for example, that a hypothesis functions as a guess about an outcome, but is not necessarily part of a larger explanatory system; that background knowledge may be used to provide ideas about what to study, but this knowledge is not in the form of a theory or other model; and that theory is an optional tool one might use at the end of a study to help explain results. These ideas appear consistent with a "folk theory" of doing science that is promoted subtly, but pervasively, in textbooks, through the media, and by members of the science education community themselves. Finally, although all participants held degrees in science, the participants who eventually used inquiry in their own classrooms were those who had significant research experiences in careers or postsecondary study and greater science-content background. © 2004 Wiley Periodicals, Inc. J Res Sci Teach 41: 481,512, 2004 [source] Islands in a string: The use of background knowledge in an obstetrical resident's notesJOURNAL OF SOCIOLINGUISTICS, Issue 2 2002Pamela Hobbs [source] Chain graph models and their causal interpretations,JOURNAL OF THE ROYAL STATISTICAL SOCIETY: SERIES B (STATISTICAL METHODOLOGY), Issue 3 2002Steffen L. Lauritzen Chain graphs are a natural generalization of directed acyclic graphs and undirected graphs. However, the apparent simplicity of chain graphs belies the subtlety of the conditional independence hypotheses that they represent. There are many simple and apparently plausible, but ultimately fallacious, interpretations of chain graphs that are often invoked, implicitly or explicitly. These interpretations also lead to flawed methods for applying background knowledge to model selection. We present a valid interpretation by showing how the distribution corresponding to a chain graph may be generated from the equilibrium distributions of dynamic models with feed-back. These dynamic interpretations lead to a simple theory of intervention, extending the theory developed for directed acyclic graphs. Finally, we contrast chain graph models under this interpretation with simultaneous equation models which have traditionally been used to model feed-back in econometrics. [source] Hempel's Paradox, Law-likeness and Causal RelationsPHILOSOPHICAL INVESTIGATIONS, Issue 3 2009Severin Schroeder It is widely thought that Bayesian confirmation theory has provided a solution to Hempel's Paradox (the Ravens Paradox). I discuss one well-known example of this approach, by John Mackie, and argue that it is unconvincing. I then suggest an alternative solution, which shows that the Bayesian approach is altogether mistaken. Nicod's Condition should be rejected because a generalisation is not confirmed by any of its instances if it is not law-like. And even law-like non-basic empirical generalisations, which are expressions of assumed underlying causal regularities, are not so confirmed if they are absurd in the light of our causal background knowledge or if their instances are not also possible instances of the relevant causal claim. [source] CRITICISM OF LITERATURE AND CRITICISM OF CULTURERATIO, Issue 4 2009Stein Haugom Olsen There is a class of critics who are dissatisfied with the academic status of literary criticism and who want to re-establish for literary criticism the status it possessed in the early and mid nineteenth century as simultaneously cultural and social criticism. This is an impossible task. The ,cultural critics' of the nineteenth century possessed their authority because they were without competition and because they could command the attention and respect of the whole of the literate audience. However, at the end of the nineteenth century intellectual authority came to be based in specialised academic disciplines and individual authority was undermined and ultimately disappeared. At the same time, the arrival of universal literacy in Britain fragmented and ultimately destroyed the generally educated audience to which the cultural critics addressed themselves. Consequently there is today no role for the cultural critic. Literary critics cannot speak with authority about social, political, or cultural questions. They can, however, speak with authority about literature. Whether or not this criticism can be grounded in disciplinary knowledge, it serves a necessary function for an audience that no longer possesses the skill of reading literary works and lacks the background knowledge that is necessary to make sense of literature. [source] The personal response: A novel writing assignment to engage first year students in large human biology classes,BIOCHEMISTRY AND MOLECULAR BIOLOGY EDUCATION, Issue 2 2007Roger W. Moni Abstract The teaching of highly valued scientific writing skills in the first year of university is challenging. This report describes the design, implementation, and evaluation of a novel written assignment, The Personal Response and accompanying Peer Review, in the course, Human Biology (BIOL1015) at The University of Queensland. These assignments were the first assessment tasks of the course and were set early in the first semester of university. BIOL1015 had a diverse cohort of 319 first year students from five bachelor degree programs, primarily from Pharmacy and Human Movement Studies. Audio files in the form of interviews with eminent biomedical scientists were obtained from a leading public radio program. Students used these files as triggers to submit a short but highly structured assignment written from a personal perspective and in an expressive style. Evaluations revealed that overall, students found the task interesting and challenging. Students performed well, regardless of their background knowledge, disciplinary interest, or preference for topics within human biology. This study demonstrated that The Personal Response was an appropriate task for these first year students of human biology. It represents an alternative to traditional essay writing. [source] Hypothesis, induction and background knowledge.BIOESSAYS, Issue 9 2001Data do not speak for themselves. No abstract is available for this article. [source] Corroboration versus "Strongest Evidence"CLADISTICS, Issue 4 2000James. Background knowledge comprises accepted (well-corroborated) theories and results. Such theories are taken to be true for the purpose of interpreting evidence when assessing the corroboration of a hypothesis currently in question. Accordingly, background knowledge does not properly include rejected theories, false assumptions, or null models. In particular, regarding a model of random character distribution as "background knowledge" would rule out corroboration of phylogenetic hypotheses, since it would make character data irrelevant to inferring phylogeny. The presence of homoplasy is not grounds for treating characters as if they were randomly distributed, since characters can show strong phylogenetic structure even when they show homoplasy. This means that clique (compatibility) analysis is unjustified, since that method depends crucially on the assumption that characters showing any homoplasy at all are unrelated to phylogeny. Although likelihood does not measure corroboration, corroboration is closely connected to likelihood: for given evidence and background, the most likely trees are also best corroborated. Most parsimonious trees are best corroborated; the apparent clash between parsimony and likelihood is an artifact of the use of unrealistic models in most "maximum likelihood" methods. [source] Contextualizing Counterintuitiveness: How Context Affects Comprehension and Memorability of Counterintuitive ConceptsCOGNITIVE SCIENCE - A MULTIDISCIPLINARY JOURNAL, Issue 3 2007M. Afzal Upala Abstract A number of anthropologists have argued that religious concepts are minimally counterintuitive and that this gives them mnemic advantages. This paper addresses the question of why people have the memory architecture that results in such concepts being more memorable than other types of concepts by pointing out the benefits of a memory structure that leads to better recall for minimally counterintuitive concepts and by showing how such benefits emerge in the real-time processing of comprehending narratives such as folk tales. This model suggests that memorability is not an inherent property of a concept; rather it is a property of the concept, the context in which the concept is presented, and the background knowledge that the comprehendor possesses about the concept. The model predicts how memorability of a concept should change if the context containing the concept were changed. The paper also presents the results of experiments carried out to test these predictions. [source] The ED strategy: how species-level surrogates indicate general biodiversity patterns through an ,environmental diversity' perspectiveJOURNAL OF BIOGEOGRAPHY, Issue 8 2004D. P. Faith Abstract Biodiversity assessment requires that we use surrogate information in practice to indicate more general biodiversity patterns. ,ED' refers to a surrogates framework that can link species data and environmental information based on a robust relationship of compositional dissimilarities to ordinations that indicate underlying environmental variation. In an example analysis of species and environmental data from Panama, the environmental and spatial variables that correlate with an hybrid multi-dimensional scaling ordination were able to explain 83% of the variation in the corresponding Bray Curtis dissimilarities. The assumptions of ED also provide the rationale for its use of p-median optimization criteria to measure biodiversity patterns among sites in a region. M.B. Araújo, P.J. Densham & P.H. Williams (2004, Journal of Biogeography31, 1) have re-named ED as ,AD' in their evaluation of the surrogacy value of ED based on European species data. Because lessons from previous work on ED options consequently may have been neglected, we use a corroboration framework to investigate the evidence and ,background knowledge' presented in their evaluations of ED. Investigations focus on the possibility that their weak corroboration of ED surrogacy (non-significance of target species recovery relative to a null model) may be a consequence of Araújo et al.'s use of particular evidence and randomizations. We illustrate how their use of discrete ED, and not the recommended continuous ED, may have produced unnecessarily poor species recovery values. Further, possible poor optimization of their MDS ordinations, due to small numbers of simulations and/or low resolution of stress values appears to have provided a possible poor basis for ED application and, consequently, may have unnecessarily favoured non-corroboration results. Consideration of Araújo et al.'s randomizations suggests that acknowledged sampling biases in the European data have not only artefactually promoted the non-significance of ED recovery values, but also artefactually elevated the significance of competing species surrogates recovery values. We conclude that little credence should be given to the comparisons of ED and species-based complementarity sets presented in M.B. Araújo, P.J. Densham & P.H. Williams (2004, Journal of Biogeography31, 1), unless the factors outlined here can be analysed for their effects on results. We discuss the lessons concerning surrogates evaluation emerging from our investigations, calling for better provision in such studies of the background information that can allow (i) critical examination of evidence (both at the initial corroboration and re-evaluation stages), and (ii) greater synthesis of lessons about the pitfalls of different forms of evidence in different contexts. [source] | ||||||||||||||||||||||