1. School of Foreign Languages, University of Electronic Science and Technology of China, Chengdu, China
2. Department of Teacher Education, Norwegian University of Science and Technology, Trondheim, Norway
3. School of Foreign Languages, Southwest Jiaotong University, Chengdu, China; College of Foreign Languages & Culture, Chengdu University of Technology, Chengdu, China
4. Department of Educational Psychology, University of Education of Weingarten, Weingarten, Germany