Reporting Valid and Reliable Overall Scores and Domain Scores Using Bi-Factor Model.

ABSTRACT: Recently, large-scale testing programs have an increasing interest in providing examinees with more accurate diagnostic information by reporting overall and domain scores simultaneously. However, there are few studies focusing on how to report and interpret reliable total scores and domain scores based on bi-factor models. In this study, the authors introduced six methods of reporting overall and domain scores as weighted composite scores of the general and specific factors in a bi-factor model, and compared their performance with Yao's MIRT (multidimensional item response theory) method using both simulated and empirical data. In the simulation study, four factors were considered: test length, number of dimensions, correlation between dimensions, and sample size. Major findings are that B

SUBMITTER: Liu Y 

PROVIDER: S-EPMC6739746 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature