[Yang, Yuqin] Cent China Normal Univ, Sch Educ Informat Technol, Learning Sci, Wuhan, Peoples R China.
[Long, Yanwen] Cent China Normal Univ, Sch Educ Informat Technol, Wuhan, Peoples R China.
[Sun, Daner] Educ Univ Hong Kong, Dept Math & Informat Technol, Hong Kong, Peoples R China.
[Van Aalst, Jan] Univ Twente, Dept Teacher Educ, Fac Behav Management & Social Sci, Enschede, Netherlands.
[Cheng, Sanyin] Cent China Normal Univ, Fac Educ, Wuhan, Peoples R China.