Pupils' Interest Before,During, and After a Curriculum Dealing With Ecological Topics and its Relationship With Achievement

We surveyed interest in ecology prior, during, and after an ecological unit of 14 lessons (“Ecosystem Lake”). Achievement was assessed in a pretest (T-1), a class test (T-2; used for grading), and a retention test (T-3). We found a main effect of stratification on the level of interest in ecology after the educational unit (pupils from the highest stratification were more interested) but not of gender. As expected, the pre-treatment interest scores showed a highly significant influence on the post-treatment scores. Apart from interest prior to the study, situational interest measured during the educational unit also significantly influenced interest after the treatment. Positive correlations between all 3 interest scales and between interest scales and achievement scores were found. Thus, both predisposition and situational interest influence achievement. However, using regression revealed that prior interest had the strongest impact on achievement.     

Grade inflation under the threat of students’ nuisance: Theory and evidence

This study examines a channel, students’ nuisance, to explain grade inflation. “Students’ nuisance” is defined by “students’ pestering the professors for better grades.” This paper contains two parts: the game theoretic model and the empirical tests. The model shows that the potential threat of students’ nuisance can induce the professors to inflate grades. Ceteris paribus, a student is more likely to study little and to pester the professor for a better grade if: (1) the professor is lenient; (2) the studying cost is high; (3) the reward from pestering is high; (4) the cost of pestering is low.     

A Gentle Introduction to Bayesian Analysis: Applications to Developmental Research

Bayesian statistical methods are becoming ever more popular in applied and fundamental research. In this study a gentle introduction to Bayesian analysis is provided. It is shown under what circumstances it is attractive to use Bayesian estimation, and how to interpret properly the results. First, the ingredients underlying Bayesian methods are introduced using a simplified example. Thereafter, the advantages and pitfalls of the specification of prior knowledge are discussed. To illustrate Bayesian methods explained in this study, in a second example a series of studies that examine the theoretical framework of dynamic interactionism are considered. In the Discussion the advantages and disadvantages of using Bayesian statistics are reviewed, and guidelines on how to report on Bayesian statistics are provided.     

Climate change education: quantitatively assessing the impact of a botanical garden as an informal learning environment

Although informal learning environments have been studied extensively, ours is one of the first studies to quantitatively assess the impact of learning in botanical gardens on students' cognitive achievement. We observed a group of 10th graders participating in a one-day educational intervention on climate change implemented in a botanical garden. The students completed multiple-choice questionnaires in a pre-post-retention test design. Comparing the test scores revealed a significant short-term knowledge gain as well as a long-term knowledge gain. Consequently, our results show the potentials of botanical gardens as effective learning environments, and for complementing formal school-based learning settings regarding climate change education.     

A multichannel acoustically driven microfluidic chip to study particle-cell interactions

Microfluidic devices have emerged as important tools for experimental physiology. They allow to study the effects of hydrodynamic flow on physiological and pathophysiological processes, e.g., in the circulatory system of the body. Such dynamic in vitro test systems are essential in order to address fundamental problems in drug delivery and targeted imaging, such as the binding of particles to cells under flow. In the present work an acoustically driven microfluidic platform is presented in which four miniature flow channels can be operated in parallel at distinct flow velocities with only slight inter-experimental variations. The device can accommodate various channel architectures and is fully compatible with cell culture as well as microscopy. Moreover, the flow channels can be readily separated from the surface acoustic wave pumps and subsequently channel-associated luminescence, absorbance, and/or fluorescence can be determined with a standard microplate reader. In order to create artificial blood vessels, different coatings were evaluated for the cultivation of endothelial cells in the microchannels. It was found that 0.01% fibronectin is the most suitable coating for growth of endothelial monolayers. Finally, the microfluidic system was used to study the binding of 1 μm polystyrene microspheres to three different types of endothelial cell monolayers (HUVEC, HUVECtert, HMEC-1) at different average shear rates. It demonstrated that average shear rates between 0.5 s⁻¹ and 2.25 s⁻¹ exert no significant effect on cytoadhesion of particles to all three types of endothelial monolayers. In conclusion, the multichannel microfluidic platform is a promising device to study the impact of hydrodynamic forces on cell physiology and binding of drug carriers to endothelium.     

Capturing information on technology convergence,international collaboration,and knowledge flow from patent documents: A case of information and communication technology

In addressing persistent gaps in existing theories, recent advances in data-driven research approaches offer novel perspectives and exciting insights across a spectrum of scientific fields concerned with technological change and the socio-economic impact thereof. The present investigation suggests a novel approach to identify and analyze the evolution of technology sectors, in this case, information and communications technology (ICT), considering international collaboration patterns and knowledge flows and spillovers via information inputs derived from patent documents.The objective is to utilize and explore information regarding inventors’ geo-location, technology sector classifications, and patent citation records to construct various types of networks. This, in turn, will open up avenues to discover the nature of evolutionary pathways in ICT trajectories and will also provide evidence of how the overall ICT knowledge space, as well as directional knowledge flows within the ICT space, have evolved differently. It is expected that this data-driven inquiry will deliver intuitive results for decision makers seeking evidence for future resource allocation and who are interested in identifying well-suited collaborators for the development of potential next-generation technologies. Further, it will equip researchers in technology management, economic geography, or similar fields with a systematic approach to analyze evolutionary pathways of technological advancements and further enable exploitation and development of new theories regarding technological change and its socio-economic consequences.     

Zwischen Seniorität und Alterität

Demographic changes are leading to an altered population structure and subsequently to changes in the age structure of potential participants in educational training. Adult education has reacted to this by developing special provisions for older participants and a concept of intergenerational learning provision for different generations. Arranging such intentional intergenerational processes is indeed no small task for adult education. This contribution will look at this challenge more closely. To this aim, the orientations of professional and non-professional adult educators and participants in intergenerational learning processes will be reconstructed in a qualitative investigation. It can be shown that the andragogic skill of adult educators is a pre-requisite for the facilitation of learning processes, which are explicitly intergenerational.