One of the key aspects of psychological type is the combination of the Sensing or Intuition preference with the Thinking or Feeling preference. The possible combinations - ST, SF, NF, and NT, which form the four columns of the type table, are called function pairs because they say so much about how we function in life.

Since these preference pairs form the middle two letters of each person’s four-letter type code and define how we prefer to gather information and make decisions—our core mental priorities—they are sometimes referred to as “the heart of type.”

Determining Your Own “Heart of Type”

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