IPIP provides journal citations to trace those inventories back to the publication as well as correlation tables between questions of the same factor and between results from different inventories for comparison.
[4][5][6] Scoring keys that mention the items used for a test are given in a list form;[7] they can be formatted into questionnaires.
[8] Many broad-bandwidth personality inventories (e.g., MMPI, NEO-PI) are proprietary.
[9] An additional problem is that these proprietary instruments are rarely revised, with some having items that are dated.
The IPIP website does not provide any tests formatted for administration.