When formalized, the procedure is called “item analysis”. It is a scientific way of improving the quality of tests and test items in an item bank. An item analysis provides three kinds of important information about the quality of test items. Item difficulty: A measure of whether an item was too easy or too hard. The%ITEM macro computes descriptive statistics for analysis of data from a multiple-choice test. Each observation contains the answers from one subject to a set of questions ('items'). The data are.