psychological test, which is designed to determine the type of temperament – one of the most stable personality characteristics. The technique was developed by Professor David Keirsey of the University of California based on the concept of Carl Gustav Jung and the modified Myers-Briggs typology (see Myers-Briggs type indicator). Because the determinant often gives results that do not match the MBTI test, Keirsey claims that his theory and the Myers-Briggs theory are different theories. The author distinguishes four integral types of temperament: sensory-impulsive (“Dionysius”), sensory-planning (“Epimetheus”), intuitive-sensual (“Apollo”), intuitive-logical (“Prometheus”). Each of the types, in turn, is divided into four functional portraits, reflecting less significant psychological differences. The resulting 16 portraits have alphabetic (similar to MBTI) and conventional verbal designations.