higher-order item response model
可搜索文献
Song, H. (2007). A higher-order item response model: development and application.     The State University of New Jersey
de la Torre, Jimmy ; Song, Hao.(2009) Simultaneous Estimation of Overall and Domain Abilities: A Higher-Order IRT Model Approach.
De la Torre,J.,& Hong,Y.(2010).Parameter estimation with small sample size:A higher-order IRT model approach.獳pplied Psychological Measurement, 34,267-285.