NEO PI-R MBTI Personality Type

NEO PI-R

The Revised NEO Personality Inventory (NEO PI-R) was developed by Paul Costa and Robert McCrae from the 1970s through to the 2000s. This is a version of the big 5 which subdivides each trait into six facets. This has become one of the most popular and influential renderings of the big 5 system and it is this model (along with its descendants) that you are most likely to encounter when researching big 5 traits. This is a proprietary inventory which means that some kind of remuneration must be paid to the copyright owners whenever the test is used. The International Personality Item Pool (IPIP) was developed in response to a demand for public domain versions of inventories like the NEO PI-R. If you have ever taken a free Big 5 test online that presented your results in the form of six facets per trait then that test was probably based on the IPIP.