Measurement uncertainty as a threshold concept in Physics

We report on the initial findings of a study aimed at developing ways to address threshold concepts in the design of undergraduate curricula, involving academics in two disciplines (physics and law) from four Australian universities The present paper compares two different processes by which physics academics identified and characterised a candidate threshold concept, measurement uncertainty, using student interviews and their own experiences as teachers

Use of tobacco and alcohol by Swiss primary care physicians: a cross-sectional survey

BACKGROUND: Health behaviours among doctors has been suggested to be an important marker of how harmful lifestyle behaviours are perceived. In several countries, decrease in smoking among physicians was spectacular, indicating that the hazard was well known. Historical data have shown that because of their higher socio-economical status physicians take up smoking earlier. When the dangers of smoking become better known, physicians began to give up smoking at a higher rate than the general population. For alcohol consumption, the situation is quite different: prevalence is still very high among physicians and the dangers are not so well perceived. To study the situation in Switzerland, data of a national survey were analysed to determine the prevalence of smoking and alcohol drinking among primary care physicians. METHODS: 2'756 randomly selected practitioners were surveyed to assess subjective mental and physical health and their determinants, including smoking and drinking behaviours. Physicians were categorised as never smokers, current smokers and former smokers, as well as non drinkers, drinkers (AUDIT-C < 4 for women and < 5 for men) and at risk drinkers (higher scores). RESULTS: 1'784 physicians (65%) responded (men 84%, mean age 51 years). Twelve percent were current smokers and 22% former smokers. Sixty six percent were drinkers and 30% at risk drinkers. Only 4% were never smokers and non drinkers. Forty eight percent of current smokers were also at risk drinkers and 16% of at risk drinkers were also current smokers. Smoking and at risk drinking were more frequent among men, middle aged physicians and physicians living alone. When compared to a random sample of the Swiss population, primary care physicians were two to three times less likely to be active smokers (12% vs. 30%), but were more likely to be drinkers (96% vs. 78%), and twice more likely to be at risk drinkers (30% vs. 15%). CONCLUSION: The prevalence of current smokers among Swiss primary care physicians was much lower than in the general population in Switzerland, reflecting that the hazards of smoking are well known to doctors. However, the opposite was found for alcohol use, underlining the importance of making efforts in this area to increase awareness among physicians of the dangers of alcohol consumption

Genetic Linkage and Association Analysis for Loneliness in Dutch Twin and Sibling Pairs Points to a Region on Chromosome 12q23–24

We obtained evidence from a large study in Dutch twins (N = 8387) and siblings (N = 2295) that variation in loneliness has a genetic component. The heritability estimate for loneliness, which was assessed as an ordinal trait, was 40% and did not differ between males and females. There were 682 sibling pairs with genotypic (around 400 microsatellite markers) data. We combined phenotypic and genotypic data to carry out a genome scan to localize QTLs for loneliness. One region on chromosome 12q23.3-24.3, showed near suggestive linkage. Genetic association tests within this region revealed significant association (p-value 0.009) with one of the alleles of marker D12S79 and with one of the alleles of neighbouring marker D12S395 (p-value 0.043). We review evidence for linkage in this region for psychiatric disorders and discuss our findings within this context. © 2006 Springer Science+Business Media, Inc

A phenomenographic approach to developing academics' understanding of the nature of teaching and learning

Phenomenography is best known as an empirical research approach for investigating variation in conceptions of different educational phenomena - including learning, teaching and particular disciplinary concepts such as price in economics and motion in physics. It is less well-known for its theoretical basis, in terms of its epistemological and ontological claims (Marton and Booth 1997), and the variation theory of learning that has developed out of phenomenographic research and theory (Marton and Tsui 2004). This paper discusses what 'conception' and 'conceptual development' mean from a phenomenographic perspective and how phenomenography and variation theory can be combined with empirical research on academics' conceptions of teaching to inform the design of a postgraduate course for academics, aimed at the development of academics' understanding of the nature of teaching and learning

An academic perspective on research and being a researcher: an integration of the literature

This article provides an integrative review of the developing body of literature investigating academics' ways of understanding research. The resulting review highlights implicit variation between different studies in the focus they have taken to addressing this research question, varyingly emphasising academics' research intentions, questions, processes and/or outcomes. It is suggested that these four foci represent different dimensions of academics' understandings of the nature of research. The review is followed by the report of an empirical study that brings these dimensions together in an integrated way by clarifying relationships between academics' experiences of: research intentions (who is affected by the research), research outcomes (the anticipated impact of the research), research questions (the nature of the object of study), research process (how research is undertaken), and researcher affect (underlying feelings about research). The last dimension, researcher affect, has not been found in previous studies. This may be due to the focus taken in this study on ways of understanding 'being a researcher', rather than ways of understanding 'research' per se