Motivation for Educational Attainment in Grade 9 Predicts High School Completion     

Stephen G. West  Jan N. Hughes  Han Joe Kim  Shelby S. Bauer 《Educational Measurement》2019,38(2):27-40

The Motivation for Educational Attainment (MEA) questionnaire, developed to assess facets related to early adolescents’ motivation to complete high school, has a bifactor structure with a large general factor and three smaller orthogonal specific factors (teacher expectations, peer aspirations, value of education). This prospective validity study investigated the utility of each factor in predicting high school dropout or completion of a general education development (GED) certificate versus completion of a high school degree. Participants were 474 (55.1% male) ethnically diverse students who were originally recruited into a larger longitudinal study in Grade 1 on the basis of academic risk. Fourteen years later, 373 had obtained a high school diploma, 15 had obtained a GED, and 86 had dropped out of high school. During their first year of Grade 9, participants were administered the MEA. Using multinomial logistic regression with high school graduation as the reference outcome and controlling for Grade 9 letter grades, reading and math test scores, gender, and ethnic/racial group status, scores on the latent general factor and the latent peer aspirations factor predicted high school dropout versus high school graduation status. Neither the general factor nor any of the three specific factors predicted GED completion versus high school graduation. Ethnicity, but not gender, moderated the associations between scores on the general factor and high school graduation versus dropout.  相似文献   

Editorial     

Brian Dorn  Jan Vahrenhold 《Computer Science Education》2019,29(1):1-4

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Cardiorespiratory fitness and arm bone mineral health in young males with spinal cord injury: the mediator role of lean mass     

Irene Rodríguez-Gómez  Soraya Martín-Manjarrés  María Martín-García  Sara Vila-Maldonado  Ángel Gil-Agudo  Luis M. Alegre 《Journal of sports sciences》2019,37(7):717-725

Spinal cord injury (SCI) derives in loss of bone mineral content (BMC) and bone mineral density (BMD). However, physical activity is an important determinant in bone mass acquisition, which is partially mediated through the lean mass (LM). The aim was to examine the effect of cardiorespiratory fitness (CRF) on BMD and BMC arms of adult males with SCI and able-bodied controls using the arm LM as a mediator variable. Thirty able-bodied men and thirty men with SCI participated. BMC and BMD were analysed by DXA, and indirect calorimetry was used to calculate VO_2peak during a progressive arm-cranking test. When groups were divided by the amount of LM, the subgroup with highest LM had significantly higher arm BMC compared to the lowest LM subgroup (p ≤ 0.05) in both SCI and able-bodied groups. Moreover, same differences were found when confidence intervals were analysed. Only in the SCI group, arm LM mediated the relationship between bone mass and CRF at 30.9%, as indicated by the Sobel test (z = 2.17 and z = 2.04 for BMC and BMD, respectively). In conclusion, LM mediates the indirect association between CRF and bone health, specifically in the arms. This finding highlights the importance of having an adequate CRF for the maintenance of good bone health in SCI men.  相似文献   

Development of Gender Typicality and Felt Pressure in European French and North African French Adolescents     

Adam J. Hoffman  Florence Dumas  Florence Loose  Annique Smeding  Beth Kurtz-Costes  Isabelle Régner 《Child development》2019,90(3):e306-e321

Trajectories of gender identity were examined from Grade 6 (M_age = 11.9 years) to Grade 9 in European French (n = 570) and North African French (n = 534) adolescents, and gender and ethnic group differences were assessed in these trajectories. In Grade 6, boys of both ethnic groups reported higher levels of gender typicality and felt pressure for gender conformity than girls. European French girls and boys and North African French girls reported decreasing gender typicality from Grade 6 to Grade 9, whereas North African French boys did not change. Felt pressure decreased among girls, did not change in European French boys, and increased in North African French boys. Ethnic and gender differences in gender identity development are discussed.  相似文献   

When Cultural Criticism Blurs Cultural Hierarchies     

Anne-Sophie Béliard 《Journalism Practice》2015,9(6):907-923

This article analyzes the emergence of TV series criticism, a recent journalistic genre in French magazines. It aims to show how dedicated fans have become professional series journalists starting in the early 1990s. The study demonstrates that this new kind of journalism challenges cultural hierarchies by legitimizing TV series as a cultural genre and distinguishing between different types of series.  相似文献   

Fear of cancer is associated with cancer information seeking,scanning and avoiding: a cross‐sectional study among cancer diagnosed and non‐diagnosed individuals     

Sara Nelissen  Kathleen Beullens  Marijke Lemal  Jan Van den Bulck 《Health information and libraries journal》2015,32(2):107-119

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Parallelized ultra-high throughput microfluidic emulsifier for multiplex kinetic assays     

Jiseok Lim  Ouriel Caen  Jérémy Vrignon  Manfred Konrad  Valérie Taly  Jean-Christophe Baret 《Biomicrofluidics》2015,9(3)

Droplet-based microfluidic technologies are powerful tools for applications requiring high-throughput, for example, in biochemistry or material sciences. Several systems have been proposed for the high-throughput production of monodisperse emulsions by parallelizing multiple droplet makers. However, these systems have two main limitations: (1) they allow the use of only a single disperse phase; (2) they are based on multiple layer microfabrication techniques. We present here a pipette-and-play solution offering the possibility of manipulating simultaneously 10 different disperse phases on a single layer device. This system allows high-throughput emulsion production using aqueous flow rates of up to 26 ml/h (>110 000 drops/s) leading to emulsions with user-defined complex chemical composition. We demonstrate the multiplex capabilities of our system by measuring the kinetics of β-galactosidase in droplets using nine different concentrations of a fluorogenic substrate.  相似文献   

Flow distribution in parallel microfluidic networks and its effect on concentration gradient     

Cyprien Guermonprez  Sébastien Michelin  Charles N. Baroud 《Biomicrofluidics》2015,9(5)

The architecture of microfluidic networks can significantly impact the flow distribution within its different branches and thereby influence tracer transport within the network. In this paper, we study the flow rate distribution within a network of parallel microfluidic channels with a single input and single output, using a combination of theoretical modeling and microfluidic experiments. Within the ladder network, the flow rate distribution follows a U-shaped profile, with the highest flow rate occurring in the initial and final branches. The contrast with the central branches is controlled by a single dimensionless parameter, namely, the ratio of hydrodynamic resistance between the distribution channel and the side branches. This contrast in flow rates decreases when the resistance of the side branches increases relative to the resistance of the distribution channel. When the inlet flow is composed of two parallel streams, one of which transporting a diffusing species, a concentration variation is produced within the side branches of the network. The shape of this concentration gradient is fully determined by two dimensionless parameters: the ratio of resistances, which determines the flow rate distribution, and the Péclet number, which characterizes the relative speed of diffusion and advection. Depending on the values of these two control parameters, different distribution profiles can be obtained ranging from a flat profile to a step distribution of solute, with well-distributed gradients between these two limits. Our experimental results are in agreement with our numerical model predictions, based on a simplified 2D advection-diffusion problem. Finally, two possible applications of this work are presented: the first one combines the present design with self-digitization principle to encapsulate the controlled concentration in nanoliter chambers, while the second one extends the present design to create a continuous concentration gradient within an open flow chamber.  相似文献   

Does tagging improve the navigation of online recorded lectures by students?          下载免费PDF全文

Pierre Gorissen  Jan van Bruggen  Wim Jochems 《British journal of educational technology : journal of the Council for Educational Technology》2015,46(1):45-57

Students more and more have access to online recordings of the lectures they attend at universities. The volume and length of these recorded lectures however make them difficult to navigate. Research shows that students primarily watch the recorded lectures while preparing for their exams. They do watch the full recorded lectures, but review only the parts that are relevant to them. While doing so, they often lack the required mechanisms to locate efficiently those parts of the recorded lecture that they want to view. In this paper, we describe an experiment where expert tagging is used as a means to facilitate the students' search. In the experiment, 255 students had the option to use tags to navigate 18 recorded lectures. We used the data tracked by the lecture capture system to analyze the use of the tags by the students. We compared these data to students who did not use the tagging interface (TI). Results show that the use of the TI increases in time. Students use the TI more actively over time while reducing the amount of video that they view. The experiment also shows that students who use the TI score higher grades when compared with students who use the regular interface.  相似文献   

Citizenship education in Mexico: the depoliticisation of adolescence through secondary school     

Leonel Pérez-Expósito 《International Studies in Sociology of Education》2015,25(3):225-257

Recent contributions have argued about the depoliticisation of citizenship education (CE), mainly through theoretical and documentary analyses, and based on the European context. Nonetheless, there is a lack of field studies which can provide empirical evidence about how does the depoliticisation of CE actually operate. Based on a mixed-method research in Mexico City’s secondary schools, this paper shows how the contemporary approach to CE, instead of looking at nurturing children’s and adolescents’ politicity, contributes to pupils’ depoliticisation. Among different potential characterisations of political participation (PP), the curriculum of CE circumscribes it within the arena of formal politics, from which students are largely excluded in the present. Additionally, CE promotes a range of practices of participation which are deprived from a political meaning. Students appropriate them discursively, but perceive limited opportunities for perform them, especially in school. Through the depoliticisation of CE, adolescents mostly learn that PP is a promise of inclusion in the future, while the idea of active citizenship becomes reduced to a correct discourse about largely imperceptible practices in students’ everyday life. The article stresses the need of shifting the priority of CE in Mexico from the formal curriculum to the transformation of school practices, in order to develop students’ politicity through participation.  相似文献