Peer effects and measurement error: The impact of sampling variation in school survey data (evidence from PISA)

Investigation of peer effects on achievement with sample survey data on schools may mean that only a random sample of the population of peers is observed for each individual. This generates measurement error in peer variables similar in form to the textbook case of errors-in-variables, resulting in the estimated peer group effects in an OLS regression model being biased towards zero. We investigate the problem using survey data for England from the Programme for International Student Assessment (PISA) linked to administrative microdata recording information for each PISA sample member's entire year cohort. We calculate a peer group measure based on these complete data and compare its use with a variable based on peers in just the PISA sample. We also use a Monte Carlo experiment to show how the extent of the attenuation bias rises as peer sample size falls. On average, the estimated peer effect is biased downwards by about one third when drawing a sample of peers of the size implied by the PISA survey design.     

The design of technology-rich learning environments as metacognitive tools in history education

Research has shown that learners do not always engage in appropriate metacognitive and self-regulatory processes while learning complex historical topics. However, little research exists to guide the design of technology-rich learning environments as metacognitive tools in history education. In order to address this issue, we designed a metacognitive tool using a bottom-up approach. Thirty-two undergraduate students read an historical narrative text either with or without the benefit of the metacognitive tool. Results from process and product data suggest that learners using the metacognitive tool had better recall and that the tool helped them (a) notice that particular events in an historical narrative text are unexplained, and (b) generate hypothetical causes to explain the occurrence of such events. We discuss the implications of these findings for the development of the MetaHistoReasoning Tool, a technology-rich learning environment that assist learners in terms of regulating their learning while they accomplish authentic tasks of historical inquiry.     

Reply to Glazier: “Comment on ‘Influence of shaft length on golf driving performance’”

Abstract

In this study we compared the kinematic features of the throwing motion between young baseball players of different age groups. Forty‐four Japanese baseball players aged 6.1 to 12.3 years who regularly played baseball, including pitchers and position players, had their throwing actions analyzed three‐dimensionally using high speed videography. Of this sample, 26 players aged above 9 years of age were categorized as the senior group, while the remaining 18 were categorized as the junior group. Senior group throwers had greater height and body mass, and produced a greater ball speed than junior group throwers. The throwing arm movement of senior group throwers was similar to that of adult skilled players. However, in the junior group throwers, the shoulder horizontal adduction angle was larger during the arm acceleration phase, and the maximum angular velocities of elbow extension and shoulder internal rotation occurred later than in senior group throwers. These results indicate that players aged above 9 years can acquire a mature throwing arm movement, while players younger than that will use an immature motion. A possible reason why these differences were shown is that the official baseball is relatively heavy for junior group throwers; they would be better advised to use a lighter ball in throwing practice.     

Adolescent's Physical Activity: Association with Socio‐Economic Status and Parental Participation Among a Portuguese Sample

ABSTRACT

Although the health effects of physical activity during adolescence have been studied less frequently, physical activity seems to have a positive influence on some health concerns in adolescence. Moreover, few studies have reported consistently the relationship between parents’ socio‐economic status (SES) and physical activity habits and adolescents’ activities. Significant physical activity gender differences were reported (p ≤ 0.001). No evidence was found regarding the influence of socio‐economic status on adolescents’ self‐reported physical activity. Mothers (r= 0.23; p ≤ 0.0001) and fathers (r= 0.16; p ≤ 0.05) seem to have a significant influence on adolescents’ physical activity.     

Examining the Relationship Between Purposeful Heading in Soccer and Computerized Neuropsychological Test Performance

The purpose of this study was to determine if a relationship exists between purposeful heading in soccer and neuropsychological test performance. Automated Neuropsychological Assessment Metrics throughput scores were derived on seven subset variables that measure a variety of neurocognitive abilities. Simple Spearman's rank correlations were calculated between headers per game (HPG) and the criterion variables. Interestingly, math processing speed (Spearman's rho = .160) and continuous performance test #2 (rho = .124) had small but significant correlations; both showed improvement in performance pre- to postseason. There were no significant correlations between HPG and the other five variables. This study found no detrimental relationship between the number of purposeful headers and the neurocognitive measures in this population.     

Cultivating archives: meanings and identities

By cultivating archives through successive activations, people and communities define their identities. In these activations, the meanings of archives are constructed and reconstructed. Archives are not a static artifact imbued with the record creator’s voice alone, but a dynamic process involving an infinite number of stakeholders over time and space. Thus, archives are never closed, but open into the future. Furthermore, digital archives are always in a state of becoming, being created and recreated by technologies of migration and reconstruction.     

《面向增长的技能——英国国家技能战略》白皮书述评

2009年11月,继《高等教育发展蓝图》之后,英国政府又公布了一项重要的国家技能人才发展战略白皮书:《面向增长的技能———英国国家技能战略》。该战略旨在通过技能人才的培养来促进英国的经济增长。白皮书包括六大主要部分,并提出了许多职业教育改革的新举措。通过对此报告进行介绍与分析,研究与借鉴英国职业教育的先进经验,对加大我国职业教育规范化、制度化建设等方面提供一些有益的参考与启示。     

Toward University Modeling Instruction—Biology: Adapting Curricular Frameworks from Physics to Biology

University Modeling Instruction (UMI) is an approach to curriculum and pedagogy that focuses instruction on engaging students in building, validating, and deploying scientific models. Modeling Instruction has been successfully implemented in both high school and university physics courses. Studies within the physics education research (PER) community have identified UMI''s positive impacts on learning gains, equity, attitudinal shifts, and self-efficacy. While the success of this pedagogical approach has been recognized within the physics community, the use of models and modeling practices is still being developed for biology. Drawing from the existing research on UMI in physics, we describe the theoretical foundations of UMI and how UMI can be adapted to include an emphasis on models and modeling for undergraduate introductory biology courses. In particular, we discuss our ongoing work to develop a framework for the first semester of a two-semester introductory biology course sequence by identifying the essential basic models for an introductory biology course sequence.     

The Impact of High School Science Teachers’ Beliefs,Curricular Enactments and Experience on Student Learning During an Inquiry-based Urban Ecology Curriculum

Inquiry-based curricula are an essential tool for reforming science education yet the role of the teacher is often overlooked in terms of the impact of the curriculum on student achievement. Our research focuses on 22 teachers’ use of a year-long high school urban ecology curriculum and how teachers’ self-efficacy, instructional practices, curricular enactments and previous experience impacted student learning. Data sources included teacher belief surveys, teacher enactment surveys, a student multiple-choice assessment focused on defining and identifying science concepts and a student open-ended assessment focused on scientific inquiry. Results from the two hierarchical linear models indicate that there was significant variation between teachers in terms of student achievement. For the multiple-choice assessment, teachers who spent a larger percentage of time on group work and a smaller percentage of time lecturing had greater student learning. For the open-ended assessment, teachers who reported a higher frequency of students engaging in argument and sharing ideas had greater student learning while teachers who adapted the curriculum more had lower student learning. These results suggest the importance of supporting the active role of students in instruction, emphasising argumentation, and considering the types of adaptations teachers make to curriculum.     

The Development of Science Education Research in Brazil and Contributions from the History and Philosophy of Science

Over the last 50 years a new research area, science education research, has arisen and undergone singular development worldwide. In the specific case of Brazil, research in science education first appeared systematically 40 years ago, as a consequence of an overall renovation in the field of science education. This evolution was also related to the political events taking place in the country. We will use the theoretical work of Rene Kaës on the development of groups and institutions as a basis for our discussion of the most important aspects that have helped the area of science education research develop into an institution and kept it operating as such. The growth of this area of research can be divided into three phases: The first was related to its beginning and early configurations; the second consisted of a process of consolidation of this institution; and the third consists of more recent developments, characterised by a multiplicity of research lines and corresponding challenges to be faced. In particular, we will analyse the special contributions to this study gleaned from the field known as the history and philosophy of science.