The proportionality model assumes that total testing time is proportional to the number of test items and the number of options per multiple choice test item. This assumption was examined, using test items having from two to five options. The model was not supported. (Author/GDC)

Nine indices of response pattern appropriateness were compared, based on item response theory, with respect to their relation to the total test score and their effectiveness in detecting unusual response patterns. The ability to differentiate between three groups was compared: cooperative examinees, uncooperative examinees, and randomly generated…