what is item fit and reliability what is item reliability what is the irt model what is item fit a function of what is item reliability when determining item fit on irt model which model is an irt what is item fit when to use item fit for a 1 pl model what is item fit in irt model how do you tell when an item is fit according to irt is item fit or reliability the same as item fit which model is used to measure item reliability in irt-based tests? what is reliability in irt based tests what is item reliability which irt test is most reliable? does item fit fit on an adaptive test how to measure items fit in an itr model what is logistic regression model adaptive testing how do you determine item reliability