In a tritype, an individual has a dominant type in each of the centers of intelligence (a body-based type, a heart-based type, and a head-based typed).
As an example, if a person identifies as a type 1, then type 1 is his or her dominant body-based type. Suppose, of the heart-based types (2, 3, and 4), the person identifies most closely with type 4. Type 4 becomes his or her dominant heart-based type. Of the head-based types (5, 6, and 7), the person identifies most with type 6. Type 6 is then his or her dominant head-based type.
From this example, types 1, 4, and 6 are part of the person's tritype. There is also a preferential order to the types that needs to be determined. Type 1 is already identified as the person's primary type. Suppose this person identifies more with type 6 than with type 4. The tritype is then 1-6-4. This not only indicates the dominant type in each center but also the preferred order of the tritypes.