Large-scale surveys typically exhibit data structures characterized by rich mutual dependencies between surveyed variables and individual-specific skip patterns. Despite high efforts in fieldwork and questionnaire design, missing values inevitably occur. One approach for handling missing values is to provide multiply imputed data sets, thus…

This article investigates links between staff working conditions in children's day care centres ("Kindertageseinrichtungen"--known as "Kitas" in Germany), job satisfaction, commitment and perceived stress at work. Data are based on the nationwide, representative questionnaire survey AQUA ("Arbeitsplatz und Qualität in…

Creativity is one of the important skills of the twenty-first century and central to higher education (HE). When we look closer into research on creativity in HE, however, it is not clear how university teachers conceptualise student creativity. How do teachers grasp, observe and express student creativity? Different methods such as interviews and…

In recently published studies on cyberbullying, students are frequently categorized into distinct (cyber)bully and (cyber)victim clusters based on theoretical assumptions and arbitrary cut-off scores adapted from traditional bullying research. The present study identified involvement classes empirically using latent class analysis (LCA), to…

The concept of physical and chemical change is far from being the clearest and most self-explanatory concept in the world. If a number of chemists are asked to define physical and chemical change, there may well appear to be a fair degree of uniformity in their answers, until a few examples are suggested. When chemists are asked to place a variety…