Assessing Students' Understandings of Biological Models and their Use in Science to Evaluate a Theoretical Framework

Research in the field of students’ understandings of models and their use in science describes different frameworks concerning these understandings. Currently, there is no conjoint framework that combines these structures and so far, no investigation has focused on whether it reflects students' understandings sufficiently (empirical evaluation). Therefore, the purpose of this article is to present the results of an empirical evaluation of a conjoint theoretical framework. The theoretical framework integrates relevant research findings and comprises five aspects which are subdivided into three levels each: nature of models, multiple models, purpose of models, testing, and changing models. The study was conducted with a sample of 1,177 seventh to tenth graders (aged 11–19 years) using open-ended items. The data were analysed by identifying students' understandings of models (nature of models and multiple models) and their use in science (purpose of models, testing, and changing models), and comparing as well as assigning them to the content of the theoretical framework. A comprehensive category system of students' understandings was thus developed. Regarding the empirical evaluation, the students' understandings of the nature and the purpose of models were sufficiently described by the theoretical framework. Concerning the understandings of multiple, testing, and changing models, additional initial understandings (only one model possible, no testing of models, and no change of models) need to be considered. This conjoint and now empirically tested framework for students' understandings can provide a common basis for future science education research. Furthermore, evidence-based indications can be provided for teachers and their instructional practice.     

A Competency Model for Process Dynamics and Control and Its Use for Test Construction at University Level

This study examined students’ competencies in engineering education at the university level. First, we developed a competency model in one specific field of engineering: process dynamics and control. Then, the theoretical model was used as a frame to construct test items to measure students’ competencies comprehensively. In the empirical application, the reliability of the test was examined. The results confirmed the applicability of the theory-based test. Also, associations between students’ competencies and individual characteristics were explored. Students who showed higher competencies could be identified based on their individual characteristics, such as participation in self-assessments. Finally, we demonstrated how to apply the standards of theory-based testing to everyday routines at the university and also highlighted some challenging issues to be considered when implementing theory-based testing in practice. This approach could be valuable: Tests based on theoretically sound models allow for appropriate measurement of students’ competencies in higher education.     

The Use of Additional Information in Problem-Oriented Learning Environments

Self-directed learning with authentic and complex problems (problem-oriented learning) requires that learners observe their own learning and use additional information when it is appropriate (e.g. hypertextual information in computer-supported learning environments). Research results indicate that learners in problem-oriented learning environments often have difficulties using additional information adequately, and that they should be supported. Two studies with a computer-supported problem-oriented learning environment in the domain of medicine analysed the effects of strategy instruction on the use of additional information and the quality of the problem representation. In Study 1, an expert model was used for strategy instruction. Two groups were compared: one group with strategy modelling and one group without. Strategy modelling influenced the frequency of looked-up hypertextual information, but did not influence the quality of learners' problem representations. This could be explained by difficulties in applying the general hypertext information to the problem. In Study 2, the additional information was presented in a more contextualised way as graphical representation of the case and its relevant concepts. Again, two groups were compared: one with a strategy instruction text and one without. Strategy instruction texts supported an adequate use of this graphical information by learners and had an effect on the quality of their problem representations. These findings are discussed with respect to the design of additional help systems in problem-oriented learning environments. This revised version was published online in July 2006 with corrections to the Cover Date.     

A mixed-methods evaluation of the longer-term implementation and utility of a teacher classroom management training programme in Irish primary schools

Inappropriate, aggressive and disruptive behaviour in the classroom can be detrimental to child and teacher well-being. This study involved a longer-term evaluation of the Incredible Years Teacher [Classroom Management] programme (IYTP) undertaken mainly within disadvantaged schools in south-west Ireland. The IYTP is designed to strengthen teacher classroom management competencies. Eleven teachers, who had previously participated in a group-randomised control trial (RCT), took part in a 12-month post-baseline follow-up assessment. Psychometric and observational measures were administered to assess teachers when interacting with children (n?=?217) in their classes. Qualitative data were collected from a sub-sample of teachers to explore their perceptions of programme impact and utility. The quantitative results showed some significant improvements in teachers’ classroom management, although few changes were recorded on teacher-child observation measures. Qualitative findings indicated continued implementation of proactive disciplining strategies and higher levels of teacher self-efficacy. These results suggest, albeit tentatively in view of the study limitations, that the IYTP can benefit teacher classroom management, as well as teacher well-being, particularly within disadvantaged schools where behavioural problems tend to be more prevalent. The IYTP could prove useful in improving teacher competencies and the classroom environment in the longer term, although a need for further research is indicated.     

Blurred Boundaries or Conflicting Epistemologies

In this article, I discuss how information activists and journalists in Egypt claimed to acquire knowledge about the world, looking particularly at the period of 2012 and 2013, during which the Supreme Council of the Armed Forces and Mohammed Morsi in turn were leading the country. Taking a point of departure in anthropological fieldwork with information activists and journalists in Egypt, I show that information activists and journalists often had very similar practices and goals, which at times made the boundaries very blurry. Yet I argue that there was a significant distinction between the epistemologies of information activists and journalists. Information activists claimed to acquire knowledge about events from being part of them, whereas journalists claimed to acquire knowledge about events from observing them without taking part. Relatedly, information activists and journalists had significantly different relationships with their audiences.     

Assessment of indoor air quality and the risk of damage to cultural heritage objects using MEMORI® dosimetry

Air pollution is one of the environmental influences that degrade cultural heritage objects situated indoors. Other essential influences, such as temperature, relative humidity, and light are often well monitored. The presence of air pollutants is less often measured or included in risk assessment. The MEMORI^® technology presented in this paper was developed as a tool for easy measurement and assessment of the general risk of degradation of heritage objects situated indoors due to indoor exposure to air pollutants. MEMORI dosimetry was performed in locations belonging to English Heritage and Tate (both located in London) and the National Archives of Norway in Oslo, to assess air quality. The related damage risk for collection objects and the protection offered by display and storage designs was assessed. A high level of acidic effect was observed inside a number of showcases, and a high level of oxidizing effect was observed in some room locations. Relatively simple mitigation measures, such as constructing tightly sealed showcases using low emitting materials, installing active carbon absorbing media inside a ‘microclimate’ frame, and using cardboard storage boxes for paper, significantly improved air quality. Overall, implementation of such measures is likely to improve the preservation of objects and reduce conservation costs.     

Effects of Alternated Basketball Competition on Perceived Competence in Adolescents with Intellectual Disabilities Over a Period of 13 Months: A research note

The purpose of this study was to examine the effects of alternated (segregated and integrated) basketball competition on two domains of perceived competence and on general self-worth. Participants were 24 adolescent males with intellectual disabilities divided equally into three groups: (a) those involved in basketball in an alternated sport competition, (b) those involved in adapted physical activity, and (c) those who were sedentary. The experimental treatment lasted for 13 months. For the sport competition group this involved 2 hr of training each week and 12 competitive meets. We administered Harter's (1985) Self-Perception Profile for Children 13 times to determine changes in perceived competence and general self-worth. The results indicate no significant changes for the different groups in the two domains of perceived competence and in general self-worth over 13 months.