This is the official website for the International Personality Item Pool (IPIP). The site includes over 3,000 items and over 250 scales that have been constructed from the items. New items and scales are developed on an irregular basis. The items and scales are in the public domain, which means that one can copy, edit, translate, or use them for any purpose without asking permission and without paying a fee.
The IPIP website was launched in 1998 with the help of an NIMH grant awarded to Dr. Lewis R. Goldberg, who also authored most of the items on this website. Dr. Goldberg oversaw the website until his death on March 29, 2026. The grant that supported the creation of this website expired in 2006, so if you find the IPIP website useful, we ask you to consider making a donation to the nonprofit Oregon Research Institute through the link below.