1. Knowledge Construction Lab, Leibniz-Institut fuer Wissensmedien, Tuebingen, Germany
2. School for Vocational Education and Training of Physiotherapy, PT Akademie Tuebingen, Tuebingen, Germany
3. Institute for Vocational Education and Training of Physiotherapy, Massage and Podiatry, Ulm, Germany
4. Department of Psychology, University of Tuebingen, Tuebingen, Germany