[Xu, Shun] Cent China Normal Univ, Collaborat & Innovat Ctr Educ Technol, Sch Educ Sci & Technol, Wuhan, Hubei, Peoples R China.
[Xu, Shun] Huang Gang Normal Univ, Sch Educ Sci & Technol, Collaborat & Innovat Ctr Educ Technol, Huanggang, Peoples R China.
[Yang, Harrison Hao] Cent China Normal Univ, Sch Educ, Sch Educ Informat Technol, Wuhan, Hubei, Peoples R China.
[Yang, Harrison Hao] SUNY Coll Oswego, Sch Educ, Sch Educ Informat Technol, New York, NY USA.
[Zhu, Sha] Cent China Normal Univ, Wuhan Huada Natl E Learning Technol Co Ltd, Wuhan, Hubei, Peoples R China.