Username Password Log In Recover password
TestInfo performs several useful analyses for tests composed of dichotomously scored items with logistic item response theory parameters. TestInfocan help you evaluate the effects of shortening a conventional test through the application of adaptive testing. It uses a list of parameter values to provide the average discrimination, difficulty, and guessing parameters, estimated test reliability (KR-20 internal-consistency reliability), expected and average test information, and test information functions for tests of four lengths (full length and ¼, ½, and ¾-length adaptive tests).