Promotionscoaching. Von einer Privatangelegenheit zum institutionellen Support

The process of attaining a doctorate is influenced by paradoxes. Who ever gets involved in it must learn to manage this process independently and to overcome the arising crises and challenges. Coaching for doctoral students is the result of a didactical concept in higher education with the goal to professionalize consultation in the graduation phase and to establish an institutional support structure.     

Cognitive and language skills of Turkish children in Germany: a comparison of the second and third generation and mixed generational groups

The paper compares several generational groups of Turkish children in Germany with respect to cognitive skills and German language skills at an early age. Empirically, children of inter-marriages outperform the other groups of Turkish children in both tests while children with a first generation mother and a second generation father score worse than all others. All group differences regarding children’s cognitive skills can be explained by the families’ socio-economic status and educational resources. In contrast, with respect to children’s language skills also parents’ endowment with receiving country specific resources (e.g., parental German language proficiency) needs to be taken into account.     

Women’s experience of midwife-led counselling and its influence on childbirth fear: A qualitative study

Background

Women with childbirth fear have been offered counseling by experienced midwives in Sweden for decades without evidence for its effectiveness, in terms of decrease in childbirth fear. Women are usually satisfied with the counselling. However, there is a lack of qualitative data regarding women’s views about counselling for childbirth fear.

Leadership and individual differences: At the cusp of a renaissance

In this introductory editorial, we provide a brief overview of the history of individual difference research in leadership. We explain the major challenges that trait research faced, and why it was revived primarily because of methodological advancements. Next, we argue that leadership individual difference research is at a cusp of a renaissance. We explain why we are at this cusp and what researchers should do reify the renaissance in terms of theoretical extensions of trait models, the application of robust methodological advancements, and the development of process models linking distal (i.e., traits) predictors to proximal predictors (e.g., behaviors, skills, attitudes), and the latter to leader outcomes. We then summarize the papers we accepted for the special issue, and conclude with an optimistic note for leadership individual difference research.     

The Multivariate Split Normal Distribution and Asymmetric Principal Components Analysis

The multivariate split normal distribution extends the usual multivariate normal distribution by a set of parameters which allows for skewness in the form of contraction/dilation along a subset of the principal axes. This article derives some properties for this distribution, including its moment generating function, multivariate skewness, and kurtosis, and discusses its role as a population model for asymmetric principal components analysis. Maximum likelihood estimators and a complete Bayesian analysis, including inference on the number of skewed dimensions and their directions, are presented.     

Poverty, welfare problems and social exclusion

This article investigates whether, and to what degree, poverty is linked to other types of welfare problems and, in larger perspective, whether the situation can be understood in terms of social exclusion. Two different measures of poverty – income poverty and deprivation poverty – and 17 indicators of welfare problems were used in the analysis. It was shown that income poverty was rather weakly related to other types of welfare problems, i.e. the most commonly used measure of poverty seems to discriminate a section of the population that does not suffer from the kinds of problems we usually assume that poverty causes. Deprivation poverty, identifying those who most often had to forgo consumption of goods and services, did correlate strongly with other types of welfare problems. Hence, people living under poor conditions do suffer from welfare problems even though this section of the population is not always captured by income poverty measures. The final analysis showed that the types of welfare problems that were most likely to cluster were deprivation poverty, economic precariousness, unemployment, psychological strain and health problems. Whether these types of accumulated welfare problems, from a theoretical perspective, can be seen as indicators of social exclusion is more doubtful.     

Semiparametric lack-of-fit tests in an additive hazard regression model

In the semiparametric additive hazard regression model of McKeague and Sasieni (Biometrika 81: 501–514), the hazard contributions of some covariates are allowed to change over time, without parametric restrictions (Aalen model), while the contributions of other covariates are assumed to be constant. In this paper, we develop tests that help to decide which of the covariate contributions indeed change over time. The remaining covariates may be modelled with constant hazard coefficients, thus reducing the number of curves that have to be estimated nonparametrically. Several bootstrap tests are proposed. The behavior of the tests is investigated in a simulation study. In a practical example, the tests consistently identify covariates with constant and with changing hazard contributions.