Are Letter Detection and Proofreading Tasks Equivalent?

When readers search for misspellings in a proofreading task or for a letter in a letter detection task, they are more likely to omit function words than content words. However, with misspelled words, previous findings for the letter detection task were mixed. In two experiments, the authors tested the functional equivalence of both tasks. Results reveal similar patterns of omissions for both search tasks when misspellings were produced by substituting one letter for another: There were more omissions for function words than for content words. However, when two letters were transposed, differences between the two tasks emerged. It is possible to conclude that letter detection and proofreading are based on common cognitive processes but the nature of the target can modulate the effects. Results are interpreted in light of the attentional disengagement model and the guidance organization model of the missing-letter effect.     

Adult outcomes of sustained high-quality early child care and education: Do they vary by family income?

Experimental research demonstrates sustained high-quality early care and education (ECE) can mitigate the consequences of poverty into adulthood. However, the long-term effects of community-based ECE are less known. Using the 1991 NICHD Study of Early Child Care and Youth Development (n = 994; 49.7% female; 73.6% White, 10.6% African American, 5.6% Latino, 10.2% Other), results show that ECE was associated with reduced disparities between low- and higher-income children's educational attainment and wages at age 26. Disparities in college graduation were reduced the more months that low-income children spent in ECE (d = .19). For wages, disparities were reduced when children from low-income families attended sustained high-quality ECE (d = .19). Findings suggest that community-based ECE is linked to meaningful educational and life outcomes, and sustained high-quality ECE is particularly important for children from lower-income backgrounds.     

Iterated gain-based stochastic filters for dynamic system identification

We propose a novel form of nonlinear stochastic filtering based on an iterative evaluation of a Kalman-like gain matrix computed within a Monte Carlo scheme as suggested by the form of the parent equation of nonlinear filtering (Kushner–Stratonovich equation) and retains the simplicity of implementation of an ensemble Kalman filter (EnKF). The numerical results, presently obtained via EnKF-like simulations with or without a reduced-rank unscented transformation, clearly indicate remarkably superior filter convergence and accuracy vis-à-vis most available filtering schemes and eminent applicability of the methods to higher dimensional dynamic system identification problems of engineering interest.     

An eye tracking comparison of external pointing cues and internal continuous cues in learning with complex animations

Two experiments used eye tracking to investigate a novel cueing approach for directing learner attention to low salience, high relevance aspects of a complex animation. In the first experiment, comprehension of a piano mechanism animation containing spreading-colour cues was compared with comprehension obtained with arrow cues or no cues. Eye tracking data revealed differences in learner attention patterns between the different experimental conditions. The second experiment used eye tracking with synchronized and non-synchronized cues to investigate the role of dynamic direction of attention in cueing effectiveness. Results of Experiment 1 showed that spreading-colour cues resulted in better targeting of attention to thematically relevant aspects and in higher comprehension scores than arrow cues or no cues. For Experiment 2, superior comprehension after the synchronized version together with eye tracking data indicated that cue effectiveness depended on attention direction being spatially and temporally coordinated with onsets of animation events having high thematic relevance to the learning task. The findings suggest the importance of perceptual cues and bottom-up processing.     

Books for the hospital emergency service

This is a list of books that should be available in either the hospital emergency room or the medical library. The forty-nine books listed are divided into the following categories: General, Surgery and Trauma, Burns, Cardiology, Dentistry, Disaster Medicine, First Aid, Geriatrics, Obstetrics, Pediatrics, Psychiatry, Toxicology, and Transportation. An asterisk has been placed before twelve books that are particularly recommended for the hospital emergency room as well as the medical library. The latest edition is given for each book, and, unless otherwise noted, each has been annotated by one of the authors.     

Walanbaa warramildanha: The impact of authentic Aboriginal community and school engagement on teachers’ professional knowledge

The conundrum of Indigenous education in Australia is that there are multiple, highly contested and polarising narratives that vie to inform both public and policy debate about how to construct effective schooling of Aboriginal students. Two of these contested discourses, which are seen to drive much of this debate, highlight the complexity of concerns—one which is essentially aspirational in its intent but unperceptive to the realities of Aboriginal student achievement and a second data focused discourse that is managerial and evaluative in its focus to disclose policy and pedagogic failures on student outcomes. The first has posed the politically more palatable proposition that there has been a slow, sometimes faltering but inexorable improvement in Aboriginal education, while the second highlights a mounting body of qualitative data that document an overall failure by school systems to lift Aboriginal student education achievement. The author recognises the complex and historical nature of the multilayered ‘issues’ that sit at the heart of Aboriginal underachievement. He argues that one of those underpinning issues that has plagued Aboriginal education centres on the depth of the socio-cultural disconnect between Aboriginal students and their communities, and teachers. He also argues that, too often, teachers are appointed to schools with limited social, political and professional knowledge about the particular needs and aspirations of Aboriginal students such that it impacts on their capacity to establish authentic connections to students. The research on which this article is based sets out to provide an understanding of both the nature and dynamics of community and school engagement in sites with high proportions of Aboriginal students. The study aimed to investigate teachers’ capacity to develop authentic pedagogic practices that are responsive to the educational, cultural and aspirational needs of Aboriginal students. In particular, the research highlights how the relational dynamics between schools and Aboriginal people have been deeply affected by colonial histories of exclusion and systemic disadvantage, pervasive school discourses of marginalisation and in particular an ignorance about holistic needs of Aboriginal students at school and the resultant negative relational interactions between schools and Aboriginal families. This multisite ethnographic study was undertaken with Aboriginal community members, teachers and school principals in 2012 as doctoral research. It was conducted within a relational landscape characterised by an enduring socio-cultural dissonance between schools and their Aboriginal communities. The study focused on examples of authentic collaboration and purposeful interactions between Aboriginal communities and schools that were shown to support teachers in building deeper understanding that enhanced their cognisance of the wider needs of Aboriginal students. The findings in this article highlight that when authentic engagement between Aboriginal people and schools occurred, it appeared to positively impact the teachers’ professional knowledge and created a consequent interest within these communities to engage with their schools. The research further identified that in each site the Aboriginal participants articulated an interest in developing authentic school collaborations that would enhance student outcomes. These findings suggested that teachers need to honour, understand and actively reflect on community history, contexts and aspirations to develop the skills and knowledge to address the particular socio-cultural and educational needs of Aboriginal students.     

Leveling the playing field in ICT design: Transcending knowledge roles by balancing division and privileging of knowledges

Abstract

This article develops a conceptual model of users’ and designers’ knowledge roles in the information and communication technology design process. The “ideal” center at the intersection of the axes for division of knowledge work and privileging of knowledges represents a balanced distribution of knowledge work between users and designers and an avoidance of privileging either group over the other. The article then applies this model to analyses of the design process for six video games wherein the knowledges of Indigenous peoples in North America were mobilized. It concludes by discussing implications for research and design practice, particularly for broadening the participation and self-articulation of marginalized groups.     

A large-scale donor attempt to improve educational status of the poor and household income distribution: The experience of PEDC in Vietnam

In 2003, donors combined together in Vietnam to support the provision of quality primary schooling for 226 disadvantaged districts (about a third of the country). US$160 million was invested in infrastructure, materials and training across the 226 districts. The programme has been commended by donors and received good press inside Vietnam. Comparison of achievement surveys in 2001 and 2007 showed, however, that there had been a decline in performance in the targeted districts. This article explores various hypotheses as to how this could have happened; and in particular the increasing amounts spent by better-off households on their children's education.     

Spectral and graph-theoretic bounds on steady-state-probability estimation performance for an ergodic Markov chain

Motivated by the wide application of Markov-chain steady-state-probability estimation, we pursue a spectral and graph-theoretic performance analysis of a classical estimator for steady-state probabilities here. Specifically, we connect a performance measure to estimate the structure of the underlying graph defined on the Markov-chain's state transitions. To do so, (1) we present a series of upper bounds on the performance measure in terms of the subdominant eigenvalue of the state transition matrix, which is closely connected with the graph structure; (2) as an illustration of the graph-theoretic analysis, we then relate the subdominant eigenvalue to the connectivity of the graph, including for the strong-connectivity case and the weak-link case. We also apply the results to characterize estimation in Markov chains with rewards.