01608nas a2200169   4500008003900000022001400039245009800053210006900151300001200220490000700232520108900239100001601328700001601344700001901360700001801379856004101397       2016                          d  a1745-398400aHybrid Computerized Adaptive Testing: From Group Sequential Design to Fully Sequential Design0 aHybrid Computerized Adaptive Testing From Group Sequential Desig  a45–620 v533 aComputerized adaptive testing (CAT) and multistage testing (MST) have become two of the most popular modes in large-scale computer-based sequential testing.  Though most designs of CAT and MST exhibit strength and weakness in recent large-scale implementations, there is no simple answer to the question of which design is better because different modes may fit different practical situations. This article proposes a hybrid adaptive framework to combine both CAT and MST, inspired by an analysis of the history of CAT and MST. The proposed procedure is a design which transitions from a group sequential design to a fully sequential design. This allows for the robustness of MST in early stages, but also shares the advantages of CAT in later stages with fine tuning of the ability estimator once its neighborhood has been identified. Simulation results showed that hybrid designs following our proposed principles provided comparable or even better estimation accuracy and efficiency than standard CAT and MST designs, especially for examinees at the two ends of the ability range.1 aWang, Shiyu1 aLin, Haiyan1 aChang, Hua-Hua1 aDouglas, Jeff  uhttp://dx.doi.org/10.1111/jedm.12100