1. Professorship for Learning Sciences and Higher Education , Department of Humanities, Social and Political Sciences, , Zurich 8092 , Switzerland
2. Swiss Federal Institute of Technology (ETH) Zurich , Department of Humanities, Social and Political Sciences, , Zurich 8092 , Switzerland
3. Centre of Excellence in Music , Mind, Body and Brain, Faculty of Educational Sciences, , Helsinki 00014 , Finland
4. University of Helsinki , Mind, Body and Brain, Faculty of Educational Sciences, , Helsinki 00014 , Finland
5. Department of Psychology, University of Tuebingen , Tuebingen 72076 , Germany