Reliability coefficients for multiple group item response theory models.

ABSTRACT: Reliability of scores from psychological or educational assessments provides important information regarding the precision of measurement. The reliability of scores is however population dependent and may vary across groups. In item response theory, this population dependence can be attributed to differential item functioning or to differences in the latent distributions between groups and needs to be accounted for when estimating the reliability of scores for different groups. Here, we introduce group-specific and overall reliability coefficients for sum scores and maximum likelihood ability estimates defined by a multiple group item response theory model. We derive confidence intervals using asymptotic theory and evaluate the empirical properties of estimators and the confidence interval

SUBMITTER: Andersson B 

PROVIDER: S-EPMC9313586 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature