%0 Journal Article %T The Information Product Methods: A Unified Approach to Dual %A Chanjin Zheng %A Chunlei Gao %A Guanrui He %J Applied Psychological Measurement %@ 1552-3497 %D 2018 %R 10.1177/0146621617730392 %X This article gives a brief summary of major approaches in dual-purpose computerized adaptive testing (CAT) in which the test is tailored interactively to both an examinee¡¯s overall ability level, ¦È , and attribute mastery level, ¦Á . It also proposes an information product approach whose connections to the current methods are revealed. An updated comprehensive empirical study demonstrated that the information product approach not only can offer a unified framework to connect all other approaches but also can mitigate the weighting issue in the dual-information approach %K dual-purpose CAT %K information product approach %K dual-information method %K ASI %K ARI %K dapperness with information %U https://journals.sagepub.com/doi/full/10.1177/0146621617730392