Education on the appalachian trail: What 2,000 miles can teach us about learning

Rather than dwelling on why too many men don't succeed in college, trekker Karen Arnold examines the features of an experience in which many men do excel: the long hike from Georgia to Maine. Educators can learn why accomplishing this feat may be more rewarding than college.     

The Role of Critique in Philosophy of Education: its Subject Matter and its Ambiguities

The role of critique in the Anglophone analytical tradition of philosophy of education is outlined and some of its shortcomings are noted, particularly its apparent claim to methodological objectivity in arriving at what are clearly contestable positions about the normative basis of education. Many of these issues can be seen to have a long history within European, and especially German, philosophy of education. In the light of this the discussion moves on to a consideration of similarities and contrasts between the Anglophone and German‐inspired deployment of the concept of critical rationality in philosophy of education. The claims to objectivity of the Anglophone tradition are contrasted with a more self‐conscious concern for social justice and improvement in other European traditions, which has been followed more recently by a greater scepticism concerning the potential of critique for delivering social justice and improvement in education. This has parallels with the growing Anglophone disillusion with ‘classical’ analytic philosophy of education. This in turn has resulted in a greater awareness of the limitations of critique: its ideological character, its rootedness in specific contexts, its own potential dogmatism and its ambiguities. The various contributions to this volume are briefly described and related to each other.     

Breaking the Cycle: Future Faculty Begin Teaching with Learner-Centered Strategies after Professional Development

The availability of reliable evidence for teaching practices after professional development is limited across science, technology, engineering, and mathematics disciplines, making the identification of professional development “best practices” and effective models for change difficult. We aimed to determine the extent to which postdoctoral fellows (i.e., future biology faculty) believed in and implemented evidence-based pedagogies after completion of a 2-yr professional development program, Faculty Institutes for Reforming Science Teaching (FIRST IV). Postdocs (PDs) attended a 2-yr training program during which they completed self-report assessments of their beliefs about teaching and gains in pedagogical knowledge and experience, and they provided copies of class assessments and video recordings of their teaching. The PDs reported greater use of learner-centered compared with teacher-centered strategies. These data were consistent with the results of expert reviews of teaching videos. The majority of PDs (86%) received video ratings that documented active engagement of students and implementation of learner-centered classrooms. Despite practice of higher-level cognition in class sessions, the items used by the PDs on their assessments of learning focused on lower-level cognitive skills. We attributed the high success of the FIRST IV program to our focus on inexperienced teachers, an iterative process of teaching practice and reflection, and development of and teaching a full course.     

体育赞助效果评估

摘要：据普华永道2012年度报告显示,全球体育赞助投入预计在2013年将达到352亿美元,较之2012年上涨5.1%。较于体育赞助市场的蓬勃发展,体育赞助效果的评估方法仍然处于探索阶段。目前广泛应用的评估方法仅是分析赞助信息曝光度对消费者记忆度的影响。然而,消费者接收和认知赞助信息的过程却被完全忽略。为弥补这一研究领域空白,研究采用实验法,利用视线追踪技术分析消费者对赞助刺激的注意力,通过回归模型分析消费者对赞助刺激的认知处理过程。实验结果表明消费者对赞助刺激的注意力是由赞助刺激的摆放位置和影响曝光度的三种因素所决定的;另外,消费者对赞助商的回忆度取决于消费者注意力和品牌熟悉度等因素。因此,赞助商应当首要考虑赞助刺激对消费者注意力的影响。基于本实验结果建立的体育赞助效果评估模型,可以帮助赞助商评估赞助效果和赞助合约价值。     

Thermally multiplexed polymerase chain reaction

Amplification of multiple unique genetic targets using the polymerase chain reaction (PCR) is commonly required in molecular biology laboratories. Such reactions are typically performed either serially or by multiplex PCR. Serial reactions are time consuming, and multiplex PCR, while powerful and widely used, can be prone to amplification bias, PCR drift, and primer-primer interactions. We present a new thermocycling method, termed thermal multiplexing, in which a single heat source is uniformly distributed and selectively modulated for independent temperature control of an array of PCR reactions. Thermal multiplexing allows amplification of multiple targets simultaneously—each reaction segregated and performed at optimal conditions. We demonstrate the method using a microfluidic system consisting of an infrared laser thermocycler, a polymer microchip featuring 1 μl, oil-encapsulated reactions, and closed-loop pulse-width modulation control. Heat transfer modeling is used to characterize thermal performance limitations of the system. We validate the model and perform two reactions simultaneously with widely varying annealing temperatures (48 °C and 68 °C), demonstrating excellent amplification. In addition, to demonstrate microfluidic infrared PCR using clinical specimens, we successfully amplified and detected both influenza A and B from human nasopharyngeal swabs. Thermal multiplexing is scalable and applicable to challenges such as pathogen detection where patients presenting non-specific symptoms need to be efficiently screened across a viral or bacterial panel.     

Undisclosed Flexibility in Computing and Reporting Structural Equation Models in Communication Science

The use of structural equation modeling (SEM) in communication research has become increasingly popular in recent years, with SEM being commonly used as the primary method of data analysis in studies published within the field’s journals. However, despite its widespread use, there are persistent misapplications of SEM in published empirical studies in the communication sciences. Of these types of misuse, the most troubling are those related to the exploitation of flexibilities in data collection and analysis. Given the number of decisions that must be made when analyzing and reporting structural equation models, decisions which often remain undisclosed, the potential for researchers to exploit flexibilities in SEM research is high. To assess the extent of this problem, as well as the more longstanding types of misuse (i.e., omission of information and disclosed “bad practice”) identified by prior studies, we undertake a methodical review of studies employing structural equation modeling within major journals in the field of communication between the years 2007 and 2011. Articles were coded on the characteristics of the sample, characteristics of the model tested, as well as for various potential problems that we defined a priori. The most serious issues are identified, and recommendations for future standards in SEM research are suggested.