ABSTRACT
Tests and questionnaires can be constructed mainly in two ways. The first is exploratory. This means that the final test is selected from the initial set of items so as to optimize psychometric criteria. For example, the test constructor may want to select a subset of items so as to satisfy a lower bound for the reliability of person ordering. The second way of test construction is confirmatory. This means that the set of items is considered to be fixed and the psychometric properties of this set are determined under a particular model without changing the composition of the item set. For example, after fifteen years of use the test constructor may decide that the norms for interpretation of test results need to be updated. The stand-alone software
