Reduced olfactory function can also be observed in various dis-orders, like early stages of idiopathic Parkinson’s disease, or in depression .If a subject is repeatedly screened with the same identification test, it might be easy to miss a possible change in olfactory acuity, simply because the person knows the test. In both of these cases, the problem might be solved by examination with the additional 16 items, which can be used as a separate tool. At the same time the tests are highly correlated and methodologically identical to the “classic” Sniffin’Sticks.