1. Department of Foreign Languages, Beijing University of Posts and Telecommunications, Beijing, People’s Republic of China
2. School of Educational Technology, Beijing Normal University, Beijing, People’s Republic of China
3. Program of Learning Sciences, National Taiwan Normal University, Taipei, Taiwan
4. Institute for Research Excellence in Learning Sciences, National Taiwan Normal University, Taipei, Taiwan
5. Faculty of Education, The Chinese University of Hong Kong, Shatin, Hong Kong
6. Department of Education, National Taiwan Normal University, Taipei, Taiwan