The development of a conceptual framework and tools to assess undergraduates' principled use of models in cellular biology

Recent science education reform has been marked by a shift away from a focus on facts toward deep, rich, conceptual understanding. This requires assessment that also focuses on conceptual understanding rather than recall of facts. This study outlines our development of a new assessment framework and tool-a taxonomy- which, unlike existing frameworks and tools, is grounded firmly in a framework that considers the critical role that models play in science. It also provides instructors a resource for assessing students' ability to reason about models that are central to the organization of key scientific concepts. We describe preliminary data arising from the application of our tool to exam questions used by instructors of a large-enrollment cell and molecular biology course over a 5-yr period during which time our framework and the assessment tool were increasingly used. Students were increasingly able to describe and manipulate models of the processes and systems being studied in this course as measured by assessment items. However, their ability to apply these models in new contexts did not improve. Finally, we discuss the implications of our results and the future directions for our research.     

Distance reached in the Anteromedial Reach Test as a function of learning and leg length

The anteromedial reach test (ART) is a new outcome measure for assessing dynamic knee stability in anterior cruciate ligament-injured patients. The effect of learning and leg length on distance reached in the ART was examined. Thirty-two healthy volunteers performed 15 trials of the ART on each leg. There was a moderate correlation (r = .44-.50) between reach distance and leg length, therefore reach distances were normalized for leg length. Normalized reach distance increased significantly over the 15 trials (p < .01), reaching a plateau after 8 trials, identified by a moving average graph. It is recommended that participants be afforded eight practice trials and that reach distances be normalized by expressing them as a percentage of leg length.     

The influence of hydration on anaerobic performance: a review

This review examines the influence of dehydration on muscular strength and endurance and on single and repeated anaerobic sprint bouts. Describing hydration effects on anaerobic performance is difficult because various exercise modes are dominated by anaerobic energy pathways, but still contain inherent physiological differences. The critical level of water deficit (approximately 3-4%; mode dependent) affecting anaerobic performance is larger than the deficit (approximately 2%) impairing endurance performance. A critical performance-duration component (> 30 s) may also exist. Moderate dehydration (approximately 3% body weight; precise threshold depends on work/recovery ratio) impairs repeated anaerobic bouts, which place an increased demand on aerobic metabolism. Interactions between dehydration level, dehydration mode, testing mode, performance duration, and work/recovery ratio during repeated bouts make the dehydration threshold influencing anaerobic performance mode dependent.     

Der Dopingdiskurs der 1950er und 1960er Jahre in den Leitmedien Der Spiegel und Die Zeit

Doping and antidoping are socially constructed, evolving and historically contingent phenomena relying on actors agreeing about allowed and deviant behaviour. Therefore, public discourse about doping represents an important part of the history of doping and antidoping. Content analysis of doping discourse in German quality media Der Spiegel und Die Zeit in the 1950s and 1960s shows that public attention for doping was rather low even though awareness increased due to the politicisation of sport and the rise of anabolic doping. Doping does not appear as a particular pressing but solvable problem. Moreover, doping is not linked to West German sport. In ethical terms, doping is perceived negatively. Neither does there exist a general mistrust in the sport bodies nor are sport bodies or sport policy clearly and resolutely requested to act. Therefore, the well-known 1969 article by Brigitte Berendonk marks a qualitative turn in public doping discourse.     

Helping out or hanging out: the features of involvement and how it relates to university adjustment

This study examined the nature of students’ out-of-class involvements with a view to identifying the kinds of involvement that are most conducive to positive adjustment to university. Students from five Canadian universities completed questionnaires in November of their first-year at university assessing the quality of their out-of-class involvements and the extent to which such activities were structured (i.e., supervised, performed regularly, had a goal or purpose). Measures of adjustment to university were administered in November and March of their first-year. Results indicated that the amount of structure present in out-of-class activities was positively related to university adjustment. Activity quality was found to mediate the relationship between activity structure and university adjustment; it seems that activities that are highly structured are related to more positive outcomes because they tend to provide participants with a high-quality experience. Results are discussed in terms of the transition to university, and first-year transition intervention programs.     

Changes in the returns to education and college quality

This paper estimates changes in the effects of educational attainment and college quality on three cohorts of students observed during the 1970s, 1980s, and 1990s. Consistent with most of the prior literature, I find that educational attainment and college quality raise earnings, and the magnitudes of these effects have increased over time. The new contributions of this paper are the following: (1) changes in these effects are disaggregated by sex, race, and parent's SES, and include estimates of effects on earnings, labor force participation, family formation, and civic participation; (2) evidence of larger increases in the effects of education on earnings and labor force participation for men, Blacks, and Hispanics; (3) declining effects of educational attainment on voter registration; and (4) increasing effects of college quality on delaying marriage and childbearing, particularly for males.     

Online video gaming: what should educational psychologists know?

Based on a significant increase in correspondence to the author from parents, teachers and psychologists concerning “addiction” to online video games like World of Warcraft, this paper provides a brief overview of the main issues surrounding excessive video game playing among adolescents. As an aid to educational psychologists, and based on two decades of the author’s own research in this area, this paper briefly overviews: (i) online gaming addictions, (ii) the differences between online and offline video gaming, and (iii) video gaming benefits. The paper ends with some practical advice that educational psychologists can give to parents about the safe playing of video games.     

Examining the Effects of High School Contexts on Postsecondary Enrollment

The present study is organized around the central hypothesis that the high school context affects students’ postsecondary outcomes. Drawing on a nationally representative sample of high school seniors from the Educational Longitudinal Survey (ELS:2002), this study broadens our empirical understanding of how students’ acquisition of human, social, and cultural capital at the individual and school level affects 2- and 4-year college attendance. Results highlight the normative role of high schools in promoting college enrollment, particularly the role of socioeconomics, academic preparation, and access to parent, peer, and college-linking networks. This study advances our understanding of the secondary-postsecondary nexus and has implications for policies and practices aimed at realizing the current administration’s promise of providing greater access to postsecondary education for all students.     

Teachers’ conceptions of teacher professionalism in England in 2003 and 2006

Theoretical and political perspectives on the nature of professionalism in teaching are abundant, but little is known about the views of teachers themselves. We asked primary and secondary school teachers in England what teacher professionalism means to them. We explored what teachers think about professionalism, on what dimensions their thinking varies, and how much it varies. We researched how successful the government had already been, and how successful it would be in the future, in changing teachers’ conceptions of professionalism. Two large‐scale national surveys were conducted, with a longitudinal element. We found that teachers’ thinking about their professionalism may be construed as consisting of an inner core of strong, shared beliefs and commitments; an intermediate set of coherent but contested components of professionalism; and an outer layer of disparate elements which are generally highly disputed and which remain unintegrated into broader ways of thinking.