International Personality Item Pool

A Scientific Collaboratory for the Development of Advanced Measures of Personality and Other Individual Differences

Site Overview

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. However, the grant that supported the creation of this website has expired, so if you find the IPIP website useful, we ask you to consider making a donation through the link below.

Warning about the nature of this site

For persons wandering into this site who have not completed a university course or two in psychological assessment, BEWARE: This site includes highly technical scientific information, and NO PERSONALITY TESTS ARE ADMINISTERED HERE.

If you are looking to take an on-line personality questionnaire based on IPIP items, try one of the following sites: The IPIP-NEO or The Synthetic Aperture Personality Assessment (SAPA)

If you are looking to use an IPIP-based inventory for personnel selection and development, try the following site: HR Potentials

If you are looking for software to administer personality questionnaires based on IPIP items on your own computer or the Web, here are some possibilities:

• Node.js Javascript files underlying implementation of IPIP-NEO-120 at bigfive-test.com
  • Original GitHub site for bigfive-test.com files
  • GitHub site for further development of bigfive-test.com
• Android app for administering the IPIP-NEO-120
  • Github repo for an Android app for administering the IPIP-NEO-120
  • Direct link to bundled apk for above Android app
• Files for implementing the IPIP Big-Five Factor Marker (BFFM) scales
  • Single-file C++ program to administer the IPIP BFFM scales
  • Single-file Python script to administer the IPIP BFFM scales

Do you know what you are doing and what you are looking for? Go straight to IPIP items and scales

• The 3,320 IPIP items in alphabetical order
• A table showing which IPIP items are currently assigned to which scales
• Multi-construct IPIP inventories (including measures of the five major personality factors)
• Single-construct IPIP scales
• All IPIP scales, organized according to an alphabetical list of constructs
• How to refer to and cite IPIP scales
• Publications that employ the IPIP
• Converting items into third-person format to obtain assessments of others
• Translations of English IPIP items into other languages

Are you not sure how to use the IPIP? A step-by-step, how-to guide

• Obtaining permission to use IPIP items and scales
• How to find IPIP items and scales
• How to format and administer IPIP measures, with a 50-item sample questionnaire
• How to score IPIP scales
• Interpreting individual IPIP scores
• If you still have a question or need more help

In addition, here is some more information about the IPIP project

• Project rationale
• History of the IPIP
• Scale construction methods
• Reliability and validity of IPIP scales
• ORI technical report on the community sample
• Norms and data sets
• Versions of IPIP measures around the World Wide Web
• Can information on this site be used to cheat on job selection tests?
• How to detect invalid responding
• Ideas for future research
• Acknowledgements