Konstruktivistische Ansätze in der Erwachsenenbildung und Weiterbildung

Theoretical approaches in the field of further education and advanced vocational training have to face multifaceted demands: the analysis of knowledge aquisition and knowledge transfer and its instructional support as well as the revealment of the mechanisms which influence further education on an organisational level in companies. This article describes, that herefore especially moderate constructivistic approaches are useful. After an introduction to the philosophical tradition of these approaches and important characteristics of adult learning, two examples of constructivistic models are being described particularly: The theory of situated learning environments and career counseling. Concluding it is shown, that a moderate constructive perspective fulfils important criteria for the theoretic modelling of further education processes.Theoretische Ansätze in der Erwachsenen- und insbesondere in der beruflichen Weiterbildung müssen sich vielfältigen Ansprüchen stellen: der Analyse des Wissenserwerbs und Wissenstransfers und seiner instruktionalen Unterstützung ebenso wie der Aufdeckung der Mechanismen, die in den Betrieben auf organisatorischer Ebene die Weiterbildung beeinflussen. In diesem Beitrag wird die Auffassung vertreten, daß dafür insbesondere liberalisierte konstruktivistische Ansätze gut geeignet sind. Nach einer Einführung in die philosophische Tradition dieser Ansätze und wichtiger Merkmale des Lernens im Erwachsenenalter werden zwei Beispiele konstruktivistischer Modelle genauer beschrieben: die Theorie situierter Lernumgebungen und das career counseling. Abschließend wird gezeigt, daß eine liberalisierte konstruktivistische Perspektive wichtige Kriterien für die theoretische Modellierung von Weiterbildungsprozessen erfüllt

Work Experience and VET: Insights from the Connective Typology and the Recontextualisation Model

The chapter compares two models of work experience – connective typology of work experience and recontextualisation of knowledge model – and uses the term work experience to refer to the way that young people enrolled in both school- and apprenticeship-based VET learn to relate their experience of education as represented by the acquisition of domain knowledge and their experience of work as represented by occupational values, skill and knowledge to one another. The common link between the two models is that they accept the existence of a mediated relationship between education and work. The former explores this relationship from a boundary-crossing perspective, focusing on learners’ movement between education and work, and identifies the outcomes associated with different models of work experience. The latter focuses on the interplay between the manifestation of knowledge in the contexts of education and work and learners’ movement within and between both contexts. It differs from the connective typology, because it takes account of the mediated nature of the contexts of education and work as well as the process of learning through work experience. The chapter concludes by using the concept of recontextualisation to highlight how digital and mobile technologies could serve as resources to facilitate learning through work experience in school- and apprenticeship-based VET

Species-complex diversification and host-plant associations in Bemisia tabaci : a plant-defense, detoxification perspective revealed by RNAseq analyses

Insect‐plant associations and their role in diversification are mostly studied in specialists. Here, we aimed to identify macroevolution patterns in the relationships between generalists and their host plants that have the potential to promote diversification. We focused on the Bemisia tabaci species complex containing more than 35 cryptic species. Mechanisms for explaining this impressive diversification have focused so far on allopatric forces that assume a common, broad, host range. We conducted a literature survey which indicated that species in the complex differ in their host range, with only few showing a truly broad one. We then selected six species, representing different phylogenetic groups and documented host‐ranges. We tested if differences in the species expression profiles of detoxification genes, are shaped more by their phylogenetic relationships or by their ability to successfully utilize multiple hosts, including novel ones. Performance assays divided the six species into two groups of three, one showing higher performance on various hosts than the other (the lower‐performance group). The same grouping pattern appeared when the species were clustered according to their expression profiles. Only species placed in the lower‐performance group showed a tendency to lower the expression of multiple genes. Taken together, these findings bring evidence for the existence of a common detoxification “machinery”, shared between species that can perform well on multiple hosts. We raise the possibility that this “machinery” might have played a passive role in the diversification of complex, by allowing successful migration to new/novel environments, leading, in some cases, to fragmentation and speciation