Naturalizing Assessment

Abstract Researchers and practitioners concerned with STEM learning (science, technology, engineering, and mathematics) occurring outside the institutional boundaries of schools recognize the need for assessment approaches that accommodate the characteristics of informal learning. These approaches, to be viable, must align with the activities, goals, roles, and outcomes we find in informal settings. A plausible starting point is in making use of naturalistic assessments—people’s own on‐going, developing awareness of who can do what under which circumstances. People regularly and informally assess one another to shape and support learning activities, goals, and outcomes. This article seeks to make a case for developing a new research program for assessing learning outcomes by capitalizing on people’s everyday attunements, which are already in place, and by getting more value out of the cultural apparatus that exists for recognizing one another’s capabilities.     

Burning a Candle in a Vessel, a Simple Experiment with a Long History

The experiment in which a candle is burned inside an inverted vessel partially immersed in water has a history of more than 2,200 years, but even nowadays it is common that students and teachers relate the change in volume of the enclosed air to its oxygen content. Contrary to what many people think, Lavoisier concluded that any change in volume in this experiment is negligible; moreover, the explanation relating oxygen consumption in the air with its change in volume is known to be wrong. In this work we briefly review the history behind the candle experiment and its relationship with some typical erroneous explanations. One of the key factors behind Lavoisier’s success was the use of experiments carefully designed to test different hypotheses. Following these steps, we performed several closed volume experiments where the candle wick was replaced by a capillary stainless steel cylinder supported and heated by a nichrome filament connected to an external power supply. Our recorded experiments are displayed as web pages, designed with the purpose that the reader can easily visualize and analyze modern versions of Lavoisier’s experiments. These experiments clearly show an initial phase of complete combustion, followed by a phase of incomplete combustion with elemental carbon or soot rising to the top of the vessel, and a final phase where the hot artificial wick only evaporates a white steam of wax that cannot ignite because no oxygen is left in the closed atmosphere. After either a complete or incomplete combustion of the oxygen, our experiments show that the final gas volume is nearly equal to the initial air volume.     

The subjective well-being of first-year tertiary students during an induction programme

This article describes the perceptions of first-year students’ subjective appraisal of ttheir wellbeing before, during and after participation in an induction programme at a higher education institution (HEI). Twenty-two first-year students participated in focus group discussions (FGDs) and semi-structured individual interviews. Thematic and interpretative analyses suggested shifts in the students’ levels of well-being: high before, low during, and increased after the induction programme. Low levels of well-being were linked to experiences of fear, feeling disrespected, and disillusionment with university life, leaders, and a perceived loss of autonomy, independency and social-relatedness. An increase in well-being was associated with social integration, support, the ability for self-reflection and perspective taking. Wellbeing is a relational and collective matter which is embedded in broader contexts. Therefore, historical legacies of oppression and inequality should be challenged through constructive debate, involving previously neglected voices intentionally; and creating opportunities for the expression of students’ needs and growth potential     

Supporting the teaching of the visual literacies in the earth and life sciences in higher education

Internationally, there has been increasing emphasis on the teaching of the academic literacies, particularly reading and writing, in higher education institutions. However, recent research is highlighting the need for more explicit teaching of multimodal forms of communication, such as the visual literacies, in undergraduate courses in a wide range of disciplines such as the sciences, engineering and architecture. The research recognises that this is an area of academic literacy teaching that has often been neglected. This article draws on the findings of a research project which set out to understand both the multimodal literacy requirements and current practices in the teaching of these literacies in the earth and life sciences at a South African university. Three key themes are discussed: learning to see like a scientist, the importance of learning by switching between and integrating different modes of representation and teaching the conventions of representation in the sciences. The conclusion proposes ways for academic developers to work with staff to develop more explicit ways of teaching the visual literacies.     

Body composition and nutritional profile of male adolescent tennis players

In this cross-sectional study, we evaluated the body composition and dietary intake of 44 adolescent tennis players. After being divided into two groups (age 10-13 years and age 14-18), the players had their weight, height, and sexual maturation assessed. Dual-energy X-ray absorptiometry was used to assess body composition. Food intake was obtained from a non-consecutive 4-day food record. The data were analysed using the Virtual Nutri v.1.0 software and compared with the present recommendations for adolescent athletes or dietary reference intakes. Body mass index and body fat for tennis practice were adequate for 89% and 71% of the tennis players respectively, regardless of age group. A calorie deficit greater than 10% of energy expenditure was observed in 32% of the sample. Fifty percent of the athletes consumed carbohydrates in accordance with recommended values. Protein and lipid intakes were above recommended values, while fibre, calcium, potassium, magnesium, and folic acid intakes were below recommendation for 98%, 80%, 100%, 100%, and 98% of the tennis players respectively. The observed nutritional deficiencies represent an additional barrier for adolescents engaged in competitive sports to achieve an optimum nutrition to maintain growth, health, and performance.     

Moving average procedures as an additional tool for real-time analytical quality control: challenges and opportunities of implementation in small-volume medical laboratories

IntroductionMoving average (MA) is one possible way to use patient results for analytical quality control in medical laboratories. The aims of this study were to: (1) implement previously optimized MA procedures for 10 clinical chemistry analytes into the laboratory information system (LIS); (2) monitor their performance as a real-time quality control tool, and (3) define an algorithm for MA alarm management in a small-volume laboratory to suit the specific laboratory.Materials and methodsMoving average alarms were monitored and analysed over a period of 6 months on all patient results (total of 73,059) obtained for 10 clinical chemistry parameters. The optimal MA procedures were selected previously using an already described technique called the bias detection simulation method, considering the ability of bias detection the size of total allowable error as the key parameter for optimization.ResultsDuring 6 months, 17 MA alarms were registered, which is 0.023% of the total number of generated MA values. In 65% of cases, their cause was of pre-analytical origin, in 12% of analytical origin, and in 23% the cause was not found. The highest alarm rate was determined on sodium (0.10%), and the lowest on calcium and chloride.ConclusionsThis paper showed that even in a small-volume laboratory, previously optimized MA procedures could be successfully implemented in the LIS and used for continuous quality control. Review of patient results, re-analysis of samples from the stable period, analysis of internal quality control samples and assessment of the analyser malfunctions and maintenance log have been proposed for the algorithm for managing MA alarms.