Personality Dimensions® is the latest evolution in presenting Personality Temperament Theory. It builds on research conducted in Canada over a 10 year period, and the foundations established by the work of Carl Jung, David Keirsey, Linda Berens, as well as a history of Temperament that spans 25 centuries. The Personality Dimensions® system utilizes a convenient card sort and short questionnaire to reveal your temperament preference. In addition to being the first Temperament assessment to incorporate the Introversion/Extraversion dichotomy, Personality Dimensions also uses four colours along with short descriptors and symbols to represent the Temperament preferences: Inquiring Green, Organized Gold, Authentic Blue, Resourceful Orange. These combined aspects create a common language of understanding of yourself and others.