Executive accounts of theory-of-mind development

Two varieties of executive theories may be distinguished: emergence accounts and expression accounts. The meta-analytic findings are fully consistent with emergence accounts of theory of mind and do not entirely rule out expression accounts.     

False belief reasoning and the acquisition of relative clause sentences

Perner (1991) has claimed that the linguistic structures and reasoning tasks mastered by 4-year-olds share a requirement to handle metarepresentation. In contrast, de Villiers (2000) has argued that they share a requirement to handle misrepresentation. In the current study, a correlation is observed between success on false belief tasks and the acquisition of relative clause sentences. This correlation is not predicted by de Villiers's account because such sentences do not require the handling of misrepresentation, but it is consistent with Perner's account because such sentences do require the handling of metarepresentation. It is proposed that only an account that integrates the accounts of both de Villiers and Perner can explain extant data on language and cognition in 4-year-olds.     

The pleasures of learning at work: Foucault and phenomenology compared

This paper provides a comparative account of two conceptualisations of pleasure. The first draws on Foucault’s analysis of bio‐power. The second provides a phenomenological account where pleasure is viewed as an aspect of our immediate consciousness. These conceptualisations are illuminated through an analysis of employees’ accounts of learning at work. Overall, the paper demonstrates how, in a Foucauldian analysis, pleasure disappears as it becomes a cipher for power whereas within the phenomenological account pleasure is foregrounded but power disappears. The concluding section focuses on the problems of both conceptualisations and explores whether we should simply accept that different analytical frameworks do different work for us or whether we should be more concerned at the losses, and gains, associated with theoretical choices. The conclusion further asks whether a concern to foreground pleasure in accounts of learning represents an antidote to the pessimism of much critical analysis or whether we should treat pleasure as a morally duplicitous category that encourages political apathy.     

Inscribing the Winch: Mechanisms by Which Students Develop Knowledge Structures for Representing the Physical World With Algebra

I propose and test an account of mechanisms by which students develop knowledge structures for modeling the physical world with algebra. The account begins to bridge the gap between current mathematics curricula, in which modeling activities play an important role, and theoretical accounts of how students learn to model, which lag behind. After describing the larger study, in which I observed 12 pairs of 8th-grade students introduce and refine algebraic representations of a physical device called a winch, I then focus on 1 pair that generated an unconventional yet sound equation. Because the prevailing genetic accounts of knowledge structures in mathematics education, cognitive science, and information-processing psychology do not explain key characteristics of the data, I begin to construct a new developmental account that does. To do so, I use forms, a class of schemata that combine patterns of algebra symbols with patterns of experience in the physical world, and 2 mechanisms, notation variation and mapping variation. I then use forms and the 2 mechanisms to analyze how the selected pair of students introduced and refined initial, faulty algebraic representations of the winch into an unconventional yet sound equation.     

Minds, modules, and meta-analysis

Wellman and colleagues' meta-analysis of performance on the false-belief task is methodologically useful, but it does not lead to any theoretical progress concerning the nature of the mechanisms that underlie the existence and development of "theory of mind." In particular, the results of this meta-analysis are perfectly compatible with "early competence" accounts that posit a specific, innate, and possibly modular basis for theory of mind. The arguments presented by Wellman and colleagues against such views stem not from their meta-analytic data, but from mistaken assumptions regarding the requirements of such theories (e.g., that there exist manipulations that improve performance only, or to a greater degree, in young children). Contrary to what Wellman and colleagues claim, their meta-analysis, while consistent with conceptual change, does not lend any new support for such theories.     

陕西省教师心理健康现状调查与分析

目的：了解陕西省教师的心理健康状况。方法：采用自评量表EPQ,CMI,SAS、SDS,SCL-90,对不同层次学校的606名教师进行个性．生理及心理健康水平测评。结果：个性特征为内向型占6．8％,中间型63．9％,外向型39．3％,情绪稳定占21．1％．中间型占55．5％,情绪不稳定占23．4％;CMI的AR男≥35分者占24．75％,女≥40分者占23．10％,MR男≥15分者占16．17％,女≥20分者占12．54％;SAS≥50分者占34．32,SDS≥53分者占35．97％：SCi。-90≥160分者占46．04％。结论：教师身心健康水平较低,其现状不容忽视。     

Who makes it into PISA? Understanding the impact of PISA sample eligibility using Turkey as a case study (PISA 2003–PISA 2012)

ABSTRACT

New evidence presented in this paper shows that existing accounts of Programme for International Student Assessment (PISA) in developing countries underestimate both progress and inequality because they do not take into account the large proportion of 15–16-year olds who are ineligible for the PISA sampling frame, primarily due to dropout or delay. In such countries, who makes it into PISA (sample eligibility) heavily influences representivity and therefore the interpretation of PISA results. We use PISA in Turkey 2003–2012 as a case study to show how combining measures of access (from the Turkish Demographic and Health Surveys) and learning outcomes (from PISA) can account for changes in the underlying population. We find the percentage of 15–16-year olds reaching Level 2 in PISA is up to twice as large as that reflected in official PISA reports. These findings have strong implications for inter-country and inter-temporal comparisons using PISA, particularly for developing countries.     

Students' use of the energy model to account for changes in physical systems

The aim of this study is to explore the ways in which students, aged 11–14 years, account for certain changes in physical systems and the extent to which they draw on an energy model as a common framework for explaining changes observed in diverse systems. Data were combined from two sources: interviews with 20 individuals and an open‐ended questionnaire that was administered to 240 students (121 upper elementary school students and 119 middle school students). We observed a wealth of approaches ranging from accounts of energy transfer and transformation to responses identifying specific objects or processes as the cause of changes. The findings also provide evidence that students do not seem to appreciate the transphenomenological and unifying nature of energy. Students' thinking was influenced by various conceptual difficulties that are compounded by traditional science teaching; for instance, students tended to confuse energy with force or electric current. In addition, the comparison between the responses from middle school students and those of elementary school students demonstrates that science teaching and maturation appeared to have a negligible influence on whether students had constructed a coherent energy model, which they could use consistently to account for changes in certain physical systems. © 2007 Wiley Periodicals, Inc. J Res Sci Teach 45: 444–469, 2008     

腾讯微博开放平台在远程教育用户认证授权中的应用

针对目前互联网上账号过多、账号设置标准不统一带来的账号管理混乱等问题,该研究凭借腾讯微博开放平台的服务优势,利用腾讯开放的海量用户账户资源实现远程教育多系统用户统一身份认证授权,在开放教育专科课程《Flash动画制作》中实现了师生利用QQ账号和密码进行一站式登录的应用。     

Is phonology bypassed in normal or dyslexic development?

A pervasive assumption in most accounts of normal reading and spelling development is that phonological coding is important early in development but is subsequently superseded by faster, orthographic coding which bypasses phonology. We call this assumption, which derives from dual process theory, the developmental bypass hypothesis. The present study tests four specific predictions of the developmental bypass hypothesis by comparing dyslexics and nondyslexics from the same families in a cross-sectional design. The four predictions are: 1) That phonological coding skill develops early in normal readers and soon reaches asymptote, whereas orthographic coding skill has a protracted course of development; 2) that the correlation of adult reading or spelling performance with phonological coding skill is considerably less than the correlation with orthographic coding skill; 3) that dyslexics who are mainly deficient in phonological coding skill should be able to bypass this deficit and eventually close the gap in reading and spelling performance; and 4) that the greatest differences between dyslexics and developmental controls on measures of phonological coding skill should be observed early rather than late in development. None of the four predictions of the developmental bypass hypothesis were upheld. Phonological coding skill continued to develop in nondyslexics until adulthood. It accounted for a substantial (32–53 percent) portion of the variance in reading and spelling performance in adult nondyslexics, whereas orthographic coding skill did not account for a statistically reliable portion of this variance. The dyslexics differed little across age in phonological coding skill, but made linear progress in orthographic coding skill, surpassing spelling-age (SA) controls by adulthood. Nonetheless, they didnot close the gap in reading and spelling performance. Finally, dyslexics were significantly worse than SA (and Reading Age [RA]) controls in phonological coding skill only in adulthood. This research was supported by the following grants to the first author: A NIMH RSDA (MH00419-05) and project grants from NIMH (MH38820-04), NICHD (HD19423-02) and the March of Dimes (12-135). Author Smith’s work was supported by a project grant from NICHD (HD 19423-02).     

Theoretical and methodological implications of associations between executive function and mathematics in early childhood

Despite agreement about the importance of executive function (EF) for children’s early math achievement, its treatment in correlational studies reflects a lack of agreement about the theoretical connection between the two. It remains unclear whether the association between EF and math operates through a latent EF construct or specific EF components. Specifying the correct measurement model has important theoretical implications for the predicted effects of EF interventions on children’s math achievement. In the current study, we tested whether associations between EF and math operate via a latent EF factor, or via specific EF components using data from a large, nationally representative sample. We then replicated these same analyses with a meta-analytic database drawn from ten studies that collected measures of children’s EF and math achievement. Our results lend support to explanations that a single EF factor accounts for most of the EF component-specific associations with math achievement. We discuss theoretical and methodological implications of these findings for future work.     

Using adult education principles for HIV/AIDS awareness intervention strategies in Botswana

This paper reports on a mainly qualitative study into company strategies for HIV/AIDS information, education and communication (IEC) strategies in the Botswana workplace. The authors argue that HIV/AIDS awareness and prevention strategies in Botswana need a new approach. The research proposal hypothesized that IEC strategies need to take account of adult education theory that promotes the active involvement of learners in developing their own curriculum. It also proposed that an Africa‐centric gender perspective should be incorporated into future IEC materials. That is, the particular cultural position of women and their vulnerability to HIV/AIDS infection in Botswana needs to be theorized as an issue of power. Integrated with this issue is the argument that it is not always appropriate to try to persuade women to take the initiative in preventing infection when culturally they have no power to do so. The paper therefore critiques some of the adult education and feminist arguments for empowerment that do not take account of existing male power positions within the Botswana social framework. Using new educational material that derived from the research findings the authors argue for a dual strategy towards behavioural change; one that takes account of the current health crisis, but also one which uses a radical pedagogical approach that engages with ‘where people are at’.     

《诗经》中秦风独特风格的形成原因

《秦风》以其悲凉、凝重的风格独立于十五国风之中。这种风格的形成首先与它地处中原偏西 ,多战事的地域分野有关 ;其次与《秦风》中的诗歌所采用“赋”的表现手法相关 ;最后则与《秦风》诗歌中选词用语偏重色彩有关。这三方面联合起来影响了秦风的整体风格。     

Gender,Internal Controls,and Academic Dishonesty: Investigating Mediating and Differential Effects

While research has found that males tend to commit more academically dishonest acts than females, we know little about what accounts for the gender differential or whether the same factors can explain academic dishonesty for males and females. This study assesses how internal controls, i.e., self‐control, shame, embarrassment, and moral beliefs, account for the relationship between gender and cheating behavior. Using a sample of students from a southern university in the United States, this study explores three questions. First, do internal controls vary across males and females? Second, can internal controls account for gender differences in test cheating? Third, do internal controls differentially or similarly predict test cheating for males and females? Results show that (a) gender differences among several internal controls as well as cheating behavior, (b) internal controls reduce the gender gap but cannot completely explain why gender differences exist in cheating, and (c) two internal controls, self‐control and moral beliefs, differentially predict male and female test cheating. We discuss limitations of our findings and how research can expand the investigation of gender differences and explanations for engaging in academically dishonest acts.     

Finite time-horizon Markov model for IEEE 802.11e

We model wireless local area network channel utilization over a finite interval through a finite time-horizon Markov （FTHM） model. By accurately capturing time-varying utilization, the FTHM model allows for generally distributed transmission-opportunity （TXOP） duration, which most existing models do not account for. An absorbing state is introduced to limit the lifetime of the counting process, resulting in a non-ergodic Markov chain that is solved via transient analysis. The model predictions for time-varying utilization are validated by simulation with errors of no more than 0.1% after eight beacon intervals. Moreover, we show that the FTHM model prediction error is below 4% for Poisson distributed and uniformly distributed TXOP durations.     

中美商业银行存款经营比较

通过分析比较中美商业银行在存款账户的开立和使用、存款账户的收费、防范存款风险等方面的差异。借鉴美国商业银行存款经营的优势，提出要建立适应社会主义市场经济的账户管理办法、提高我国商业银行的存款创新能力和积极构建存款风险防范机制等相关建议。     

When the black box springs open: practical work in schools and the nature of science

The aim of this paper is not to bury practical work in school science but to (once again) reconsider it. We draw on three main areas of discussion: accounts of science and ‘school science work'; teachers and others’ views of the nature of science; and our own data on teachers’ reactions to ‘critical incidents’ and practicals which go wrong. We use this as a basis for re‐thinking the role of practicals. An account of practical work is suggested which has as its main feature diversity rather than a single model or template. Within this diversity we believe that teachers should be open and honest with pupils about which type of practical work they are doing and why. We advocate that students should be made aware of the different kinds of practical work they do and the purposes of this practical work. In short, teachers should explain to students what type of practical work they are doing and why. Our second message is that teachers’ views about the nature of science both inform and are informed by their classroom practices and experiences‐‐especially during lab‐work. To encourage, promote and support critical reflection of these classroom practices and experiences is therefore a vital part of teacher professional development; this in time will promote science curriculum development.     

Social and asocial cues about new food: Cue reliability influences intake in rats

Dietary generalists often treat new foods with caution and may rely on social cues to identify new foods that are safe to eat. However, not all generalists show the same degree of caution, nor do they all rely on social cues to the same extent. The cue reliability approach (CRA) attempts to account for this variation by quantifying the costs and benefits of sampling a new food for the first time. The experiments reported here tested predictions of the CRA, and the results suggested that rats eat more new food when asocial cues predict that new foods will prove more profitable than familiar foods. The experimental results also suggested that rats are more likely to seek out social cues when asocial cues are unreliable.     

Identifying Essential Epistemic Heuristics for Guiding Mechanistic Reasoning in Science Learning

Mechanistic reasoning, or reasoning systematically through underlying factors and relationships that give rise to phenomena, is a powerful thinking strategy that allows one to explain and make predictions about phenomena. This article synthesizes and builds on existing frameworks to identify essential characteristics of students’ mechanistic reasoning across scientific content areas. We argue that these characteristics can be represented as epistemic heuristics, or ideas about how to direct one’s intellectual work, that implicitly guide mechanistic reasoning. We use this framework to characterize middle school students’ written explanatory accounts of two phenomena in different science content areas using these heuristics. We demonstrate evidence of heuristics in students’ accounts and show that the use of the heuristics was related to but distinct from science content knowledge. We describe how the heuristics allowed us to characterize and compare the mechanistic sophistication of account construction across science content areas. This framework captures elements of a crosscutting practical epistemology that may support students in directing the construction of mechanistic accounts across content areas over time, and it allows us to characterize that progress.