THE INVISIBLE MADE VISIBLE

This article focuses on the early history of X-rays. It argues that, during the first years after their discovery in 1895 by German physicist Wilhelm Conrad Röntgen, they were regarded as a technological attraction and a visual medium. While their application in medical practice was not yet fully established, the possibility of seeing into the realm of the invisible encouraged pioneers of this technology to actively exploit their visual powers. By using a media-history framework, and relying on primary and secondary sources in English, German, French, and Italian, the article takes into account three aspects of the rays' early display: its character of technological attraction; its association with photography; and its connection to beliefs in the supernatural and the occult.     

Lessons with Living Harvest Mice: An empirical study of their effects on intrinsic motivation and knowledge acquisition

The aim of this study was to evaluate the effects of living animals on pupils’ intrinsic motivation and knowledge. Various studies from the late 1970s and 1980s stress the high effectiveness of authentic learning experiences in pupils’ knowledge acquisition. However, there are only few current empirical studies on this topic. The research question of our study is to assess whether the use of living animals in the biology classroom supports intrinsic motivation and knowledge acquisition. In a pre-/post-test design, 185 fifth graders received two different treatments: the experimental group (N?=?74) was taught with living harvest mice (Micromys minutus) and the control group (N?=?111) received lessons with the same content which was presented in short film clips on laptop computers. Knowledge acquisition was assessed with open-ended and closed questions, while intrinsic motivation was tested with an adapted version of the Intrinsic Motivation Inventory (IMI). There were no differences in knowledge acquisition between the treatments. However, the results of the IMI showed significant differences in favour of the experimental group in interest/enjoyment, perceived competence, and perceived autonomy. Thus, living animals exert a positive influence on motivation.     

Young Children's God Concepts: Influences of Attachment and Religious Socialization in a Family and School Context

This contribution offers an overview of two studies testing two attachment theoretical correspondence hypotheses in the prediction of individual differences in young children's God concepts. The correspondence hypothesis supposes that people's view on God parallels their images of their early caregiver–child relationship. The revised correspondence hypothesis incorporates caregiver religiosity and socialization. In the first study support was found for the correspondence hypothesis in the school context examining 72 preschoolers. In the second study the revised correspondence hypothesis was partly confirmed among 198 kindergarteners. Children cognitively learn about a powerful and comforting, helping God in their homes and schools, even when all relationships with their caregivers are experienced as negative. However, in such a surrounding they do not emotionally learn about an intimate, personal bond with God.     

Teacher–student relationship at university: an important yet under-researched field

This article reviews the extant research on the relationship between students and teachers in higher education across three main areas: the quality of this relationship, its consequences and its antecedents. The weaknesses and gaps in prior research are highlighted and the importance of addressing the multi-dimensional and context-bound nature of teacher–student relationships is proposed. A possible agenda for future research is outlined.     

Performance Improvement of Risk Management Accident Reporting

This study provides risk management practitioners with best practices regarding the design and development of user‐friendly accident reports. An accident report is used as a data‐gathering tool to document the occurrence of the accident and the accompanying response, to provide feedback to employees on their performance, and for use by legal counsel if needed. The best practices presented are intended to assist employees in gathering, processing, and recording accident information quickly and accurately.     

Does soccer cleat design influence the rotational interaction with the playing surface?

Non-contact injuries in soccer players may be related to the interplay between cleat type and playing surface, and bladed shoes were often blamed for non-contact injuries with no research support. The aim of this study was to compare the rotational resistance (stiffness and peak sustainable torque) among three types of soccer cleats (metal studs, molded rubber studs, and bladed) in a controlled laboratory environment. The shoes were tested on both natural and artificial turfs under a compressive preload of 1000 N and with internal and external rotations. The three shoe models showed comparable performances with a good repeatability for each individual test on both playing surfaces. A less stiff behavior was observed for the natural turf. A tendency toward highest peak torque was observed in the studded model on natural surface. The bladed cleats provided peak torque and rotational stiffness comparable to the other models. Studded and bladed cleats did not significantly differ in their interaction with the playing surface. Therefore, soccer shoes with bladed cleats should not be banned in the context of presumed higher risk for non-contact injuries.     

勾勒关键能力,打造优质生活——OECD关键能力框架概述

关键能力是个人实现自我、终身发展、融入主流社会和充分就业所必需的知识、技能及态度之集合,是一种通用能力或横向能力,从而使得每个人具有追求完美人生的热忱,以积极公民的身份参与社会进步的本领和在劳动力市场获得充分就业的表现。关键能力框架的核心是"个体的自我认识能力",表明其心智成熟、道德完善,勇于为自我学习和行动负责。     

Validity and bias of academic achievement measures in the first year of elementary school

We tested the criterion-related validity and potential bias of two measures of pupils' academic achievement: the Teacher Rating Scale (TRS) and the Mathematics and Literacy Achievement Tests (MLTs). These measures are representative of assessment methods largely used in the elementary school. The aims were: (1) to verify the extent to which TRS and MLTs can be predicted by external criteria collected at kindergarten and (2) to estimate the degree to which each measure might be biased by family, teacher and children's characteristics. A total of 239 children were assessed during kindergarten. At the end of the first grade, they were tested for social-emotional adjustment and academic achievement (TRS and MLTs). Results suggest that family socioeconomic status and children's school readiness at kindergarten were associated with both measures; however, the predictors accounted for significantly more variance in TRS than in MLTs. Regarding the presence of bias, results indicate that TRS seems more sensitive to children's social competence, whereas the MLTs appears to be more sensitive to pupils' anxiety.