DCG has extensive experience conducting psychometric and test validation analyses for clients. Our work has ranged from cognitive ability tests to clinical psychiatric assessment tools to licensing exams.
We frequently perform classical test theory analyses and IRT analyses including item parameter estimation, ability estimation, and differential item functioning. We have expertise in structural equations modelling including confirmatory factor analysis, mean and covariance structure (MACS) analysis, and hierarchical and bifactor analyses.
In addition to analytic support, we also provide consultation to clients based on our extensive psychometric experience.