Como realizar TRI (teoria de resposta ao item) usando o R

This video shows how to reduce a psychological scale without losing information. To do this, we used techniques from Item Response Theory (IRT) using the 'mirt' package in R. This video was produced by the Psychometricians (Brazil) group, which meets on Facebook at   / 637734406355715  , in partnership with http://ibneuro.org and http://ibnec.org