1 School of Information Technology in Education, South China Normal University, Guangzhou, China.
2 Department of Building and Real Estate, Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China.
3 Department of Technology Application and Human Resource Development, Institute for Research Excellence in Learning Sciences, National Taiwan Normal University, Taipei, Taiwan.
4 School of Education, State University of New York at Oswego, Oswego, NY, United States.