C.G. Jung - CAPT.org The Myers-Briggs Type Indicator® instrument based on the theories of Carl Gustav Jung was created to make the concept of psychological type, as described by Jung, understandable and accessable to the world. The following article summarizes and describes the basic concepts of C.G. Jung's theories. in Psychology > Jungwith carlindicatorinstrumentjungmyers-briggspsychologytheoriestype