1. School of Educational Technology, Northwest Normal University, Lanzhou 730071, China
2. Hubei Research Center for Educational Information, Central China Normal University, Wuhan 430079, China
3. College of Education, Michigan State University, East Lansing, MI 48824, USA
4. School of Education, Hubei University of Arts and Science, Xiangyang 441021, China
5. Faculty of Education, Henan Normal University, Xingxiang 453007, China