The PSI is based on Carl Jung’s theory of personality types. Jung found recognizable and repeated patterns in behaviors linked to our conscious perceiving of the world, our decision making about the world, our attitudes toward life, and our relationship to the expectations of the world. The pattern it evolves is very similar to the more famous MBTI test, it is sometimes also called the mini MBTI. Both the PSI and the MBTI use Jungian theory to measure personality style. However, each instrument asks the individual to assume a different frame of reference. The MBTI attempts to measure how people usually behave. The PSI measures how people would prefer to behave. We believe this unveils a style closer to the true nature of the individual’s personality style.
The test itself was developed by C Hogan. What sets the PSI apart? Other Jungian instruments assess respondents’ behavior, which can be affected by external factors such as work environment.