what is adaptive iq test for schools what model is irt in if the test is adaptive what is the name of the model used? what test is used to test q how do you develop an iq test item? what is 2pl irt what is the different models of iq adap? what is the 1pl/irt method used for which model to use for iq testing which model is used for iq adaptive test items what is 3pl irt what is the irt test iq what is the difference between an irt and 1 pl irt adaptive model irt iq adaptive test when developing iq adaptive test what is the irt test which is the best irt test to take which irt model to use what type of irt is a 3pl