Zhuang Runsen, Xiang Yueying, Han Tieguang, Yang Guoan, Zhang Yuan, Cao Li, Cai Minyi
Short message service usage may improve the public's self-health management: A community-based randomized controlled study
Health science reports
review relevant literatures led construction selfreport instrument designed measure two subtypes student engagement school cognitive psychological engagement psychometric properties measure student engagement instrument sei assessed based responses ethnically economically diverse urban sample 1931 ninth grade students factor structures obtained using exploratory factor analyses efas half dataset model fit examined using confirmatory factor analyses cfas half dataset model displaying best empirical fit consisted six factors factors correlated expected educational outcomes research suggested iterative process developing sei implications findings discussed