Jung theorized that the dominant function acts alone in its preferred world: exterior for extraverts and interior for introverts. The remaining three functions, he suggested, operate together in the opposite orientation. If the dominant cognitive function is introverted the other functions are extraverted and vice versa. The MBTI Manual summarizes references in Jung’s work to the balance in psychological type as follows: “There are several references in Jung’s writing to the three remaining functions having an opposite attitudinal character. For example, in writing about introverts with thinking dominant…Jung commented that the counterbalancing functions have an extraverted character.” However, many MBTI practitioners hold that the tertiary function is oriented in the same direction as the dominant function.Using the INTP type as an example, the orientation would be as follows:

  • Dominant introverted thinking
  • Auxiliary extraverted intuition
  • Tertiary introverted sensing
  • Inferior extraverted feeling

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