Reconstructing Iconic Experiments in Electrochemistry: Experiences from a History of Science Course

The decomposition of water by electricity, and the voltaic pile as a means of generating electricity, have both held an iconic status in the history of science as well as in the history of science teaching. These experiments featured in chemistry and physics textbooks, as well as in classroom teaching, throughout the nineteenth and twentieth centuries. This paper deals with our experiences in restaging the decomposition of water as part of a history of science course at the Norwegian University of Science and Technology, Trondheim, Norway. For the experiment we used an apparatus from our historical teaching collection and built a replica of a voltaic pile. We also traced the uses and meanings of decomposition of water within science and science teaching in schools and higher education in local institutions. Building the pile, and carrying out the experiments, held a few surprises that we did not anticipate through our study of written sources. The exercise gave us valuable insight into the nature of the devices and the experiment, and our students appreciated an experience of a different kind in a history of science course.     

Humanistic Bildung: regulative idea or empty concept?

The article focuses on the notion and humanistic ideal of self-cultivation and self-transformation, for which the term Bildung is/was traditionally used in German educational thought. It is argued that the idea of Bildung, understood as human development and end-in-itself, is not a German exclusivity. However, to understand the specificity of the notion, it may be necessary to consider that German Enlightenment—Aufklärung—in which the term gained a lot of importance, came later in history than French, English, and Scottish Enlightenment. Whereas in the early Western Enlightenment period, freedom was understood as an outward, definitely political concept, in later German Enlightenment the predominant understanding of freedom was characterized by a rather aesthetic dimension, not outward but internal freedom. The shift from a political understanding of Enlightenment—like in France, and also England or Scotland—to German inwardness (“Innerlichkeit”), as realized by the concept of Bildung, can be—at least to a certain degree—interpreted as a desire of German intellectuals at the time to escape from a brutal and on the whole disappointing post-revolutionary world to a place where man could seek secular perfection: an escape toward inwardness.     

Social problem-solving among disadvantaged and non-disadvantaged adolescents

The study examined the differences of social problem-solving (SPS) among 12-, 14- and 16-year-old Hungarian disadvantaged and non-disadvantaged adolescents (N = 382) and investigated the relationship between SPS and family background (FB). SPS was measured through students’ own and their teachers’ evaluations by an adapted questionnaire (Social Problem-Solving Inventory–Revised, factors: negative/positive problem orientation, rationality, impulsivity and avoidance). Based on the total values of SPS, the difference between disadvantaged and non-disadvantaged adolescents was significant in all age groups in the case of negative orientation. The difference was significant in the case of impulsivity at the age of 12; in the case of avoidance at the age of 14; in the case of rationality and avoidance at the age of 16. FB had the strongest link with negative orientation, impulsivity and avoidance. In case of impulsivity and avoidance, variance explained by FB was higher among 16-year olds than among 12- and 14-year olds.     

Language‐Switching Costs in Bilingual Mathematics Learning

Behavioral studies on bilingual learning have revealed cognitive costs (lower accuracy and/or higher processing time) when the language of application differs from the language of learning. The aim of this functional magnetic resonance imaging (fMRI) study was to provide insights into the cognitive underpinnings of these costs (so‐called language‐switching costs) in mathematics. Twenty‐nine bilingual adults underwent a 4‐day arithmetic training in one language, followed by an fMRI test session in which they had to solve the trained problems in both languages. Language‐switching costs were accompanied by increased activation in areas associated with magnitude processing (intraparietal sulcus), visuo‐spatial imagery (precuneus), numerical stimulus recognition (fusiform gyrus) and executive functions (frontal areas). These findings suggest that language‐switching costs in arithmetic are due to additional numerical information processing. Bilingual education programs need to take these findings into account to reduce language‐switching costs in order to fully exploit the potential of bilingual learning.     

The BASES Expert Statement on Exercise and Cancer Survivorship

Abstract

Research examining the proximal-to-distal sequencing of segments of the body involved in overarm throwing has been equivocal: some studies have found support for the concept while others have not. The aim of the present study, therefore, was to determine if there is a proximal-to-distal sequence in the timing of the movements of joints and the distal endpoints of segments in overarm throwing. The three-dimensional kinematics of a penalty throw in experienced team handball players (n = 11) were recorded and analysed with regard to the timing of events. We analysed the timing of the maximal velocity of the distal endpoints of six segments and the maximal angular velocity in 11 joints, as well as the initiation of these joint movements. A temporal proximal-to-distal sequence was observed only for the initiation of the joint movements. No such sequence was found for maximal velocity of the joints and distal endpoints of segments.     

Effects of mat characteristics on plantar pressure patterns and perceived mat properties during landing in gymnastics

Shock absorption and stability during landings is provided by both, gymnast ability and mat properties. The aims of this study were to determine the influence of different mat constructions on their energy absorption and stability capabilities, and to analyse how these properties affect gymnast's plantar pressures as well as subjective mat perception during landing. Six mats were tested using a standard mechanical drop test. In addition, plantar pressures and subjective perception during landing were obtained from 15 expert gymnasts. The different mats influenced plantar pressures and gymnasts' subjective perception during landing of gymnasts. Significant correlations between plantar pressures at the medial metatarsal and lateral metatarsal zones of the gymnasts' feet with the different shock absorption characteristics of the mats were found. However, subjective perception tests were not able to discriminate mat functionality between the six mats as no significant correlations between the mechanical mat properties with the subjective perception of these properties were found. This study demonstrated that plantar pressures are a useful tool for discriminating different landing mats. Using similar approaches, ideally including kinematics as well, could help us in our understanding about the influences of different mats upon gymnast-mat interaction.     

Stratifikationen im Bereich der Hochschulbildung in Deutschland

Until recently there have been no universities or study programs in Germany that were connected to claims for top level positions in the field of higher education. However, by now efforts to vertically differentiate higher education are increasing and emphasize differences in quality. Such efforts have so far been observed with respect to research. In contrast, this article focusses on stratificatory efforts that are primarily connected to education at universities. It is based on cases studies in the field of graduate schools funded by the German excellence initiative and in the field of private higher education institutions that belong to law, business, and the social sciences and try to positions themselves as top level institutions. The first part addresses specific forms in which stratification is institutionalized in the field of higher education at present. The second part then exemplifies the various ways in which vertical differentiation is mobilized along a common attribute in both fields—internationality. We show that stratification is not a monolithic process but involves highly complex differentiations along various attributes and in multiple ways.     

Do images influence assessment in anatomy? Exploring the effect of images on item difficulty and item discrimination

Anatomists often use images in assessments and examinations. This study aims to investigate the influence of different types of images on item difficulty and item discrimination in written assessments. A total of 210 of 460 students volunteered for an extra assessment in a gross anatomy course. This assessment contained 39 test items grouped in seven themes. The answer format alternated per theme and was either a labeled image or an answer list, resulting in two versions containing both images and answer lists. Subjects were randomly assigned to one version. Answer formats were compared through item scores. Both examinations had similar overall difficulty and reliability. Two cross‐sectional images resulted in greater item difficulty and item discrimination, compared to an answer list. A schematic image of fetal circulation led to decreased item difficulty and item discrimination. Three images showed variable effects. These results show that effects on assessment scores are dependent on the type of image used. Results from the two cross‐sectional images suggest an extra ability is being tested. Data from a scheme of fetal circulation suggest a cueing effect. Variable effects from other images indicate that a context‐dependent interaction takes place with the content of questions. The conclusion is that item difficulty and item discrimination can be affected when images are used instead of answer lists; thus, the use of images as a response format has potential implications for the validity of test items. Anat Sci Educ © 2012 American Association of Anatomists.