Nadrah N. Test Dimensionality and Conditional Independence of Undergraduate Physics Test Items of National Open University of Nigeria: Perspective from Latent Traits Model (Ltm) Package of R Language. ijmst [Internet]. 2023Oct.9 [cited 2024Jul.3];10(5):467-7. Available from: https://cosmosscholars.com/phms/index.php/ijmst/article/view/2531