A relevant test design and reasonable accuracy are some of the prerequisites that a test can measure personality traits. PeopleTools continuously conducts validity and reliability tests to ensure that the profiles continue to measure accurately and consistently. The profiles are held up against a relevant statistical, business-oriented reference group, which is regularly updated. In addition to being based on a relevant reference group, the profiles are characterized by a high face validity which leaves the individual with the experience that the profiling is meaningful in relation to the purpose of the test