Letter to the editor concerning the article “Effects of acoustic feedback training in elite-standard Para-Rowing” by Schaffert and Mattes (2015)

In a case study, Schaffert and Mattes reported the application of acoustic feedback (sonification) to optimise the time course of boat acceleration. The authors attributed an increased boat speed in the feedback condition to an optimised boat acceleration (mainly during the recovery phase). However, in rowing it is biomechanically impossible to increase the boat speed significantly by reducing the fluctuations in boat acceleration during the rowing cycle. To assess such a, potentially small, optimising effect experimentally, the confounding variables must be controlled very accurately (that is especially the propulsive forces must be kept constant between experimental conditions or the differences in propulsive forces between conditions must be much smaller than the effects on boat speed resulting from an optimised movement pattern). However, this was not controlled adequately by the authors. Instead, the presented boat acceleration data show that the increased boat speed under acoustic feedback was due to increased propulsive forces.     

Educational self-regulation competence: toward a lifespan-based concept and assessment strategy

International Journal for Educational and Vocational Guidance - Self-regulation is crucial for learning and achievement in educational and occupational contexts. Educational self-regulation has...     

Mathematics learning with multiple solution methods: effects of types of solutions and learners’ activity

It is commonly suggested to mathematics teachers to present learners different methods in order to solve one problem. This so-called “learning with multiple solution methods” is also recommended from a psychological point of view. However, existing research leaves many questions unanswered, particularly concerning the effects of different types of solution methods and different degrees of learner’s activity. In this context, two experiments were conducted. In Experiment 1, a 2 × 3-factorial design was implemented, with the first factor concerning multiple versus uniform solutions and the second factor addressing different combinations of formal and informal solution methods. No “multiple solutions effect” was found. An integration of informal methods did not affect learning outcomes; however, it significantly reduced the subjective difficulty of the problems. Then, in Experiment 2, the effectiveness of multiple versus uniform solutions and of measures to foster an active processing was examined using a 2 × 3-factorial design (“number of solutions”: multiple versus uniform; “activity”: complete examples versus incomplete examples versus example-problem pairs). The “multiple” conditions significantly outperformed the “uniform” conditions, and complete examples and example-problem pairs significantly outperformed incomplete examples. Based on the results of Experiment 1 and 2, preconditions under which multiple solutions can improve learning outcomes are discussed.     

International research networks: Determinants of country embeddedness

Research activities are increasingly global so that embeddedness in international knowledge networks is decisive for inventive and innovative performance. We analyze determinants of countries’ embeddedness in the global photovoltaics knowledge network for the period 1980–2015 and argue that positions in this network are determined by the structure and functionality of national research systems and by instruments within the policy-mix for renewable energies. We show that cohesion and connectedness of the national research system positively affect international embeddedness, whereas centralized systems are detrimental to embeddedness. This indicates that a diffusion oriented research system allows better access to international knowledge flows. Policy instruments, especially demand side instruments, show a positive effect on embeddedness.     

Would you Bribe your Lecturer? A Quasi-experimental Study on Burnout and Bribery in Higher Education

Research in Higher Education - Bribery is a complex and critical issue in higher education (HE), causing severe economic and societal harm. Traditionally, most scholarship on HE corruption has...