1. Finnish Institute for Educational Research, University of Jyväskylä, Jyväskylä, Finland
2. Faculty of Education and Psychology, University of Jyväskylä, Jyväskylä, Finland
3. Graduate School of Teacher Education, Teikyo University, Tokyo, Japan
4. Faculty of Home Economics, Otsuma Women's University, Tokyo, Japan
5. Graduate School of Education, Yokohama National University, Yokohama, Japan
6. Faculty of Human Studies, Shirayuri University, Tokyo, Japan