IRT Models (Rasch, 2PL, & 3PL) in R with ltm package

☕If you would like to support, consider buying me a coffee ☕: https://buymeacoffee.com/statsguide8 For one-on-one tutoring/consultation services: https://guide-tree-statistics-consultation.square.site I offer one-on-one tutoring/consultation services for many topics related statistics/machine learning. You can also email me [email protected] For rcode and dataset: https://gist.github.com/musa5237 Tutorial of how to fit three unidimensional binary response Item Response Theory (IRT) models (Rasch, 2PL, and 3PL models) using the ltm package in R. The dataset used were responses to the 25-Item online IQ test modeled after Raven Progressive Matrices (RPM).