The Berkeley model of authoritarianism centered three core clusters plus six to nine more.

Evidence

If you look on page 228 of The Authoritarian Personality (Adorno et al., 1950), you will see that the first three clusters of the Berkeley model were ““Conventionalism,” “Authoritarian Submission,” and “Authoritarian Aggression.” Six to nine additional clusters follow these three, depending on how you count. — Bob Altemeyer, The Authoritarian Specter, 596

Categorization

• DEFINE: Actually the 1950 Adorno et al. measuring may be off — worth noting the author corrects pagination; the excerpt itself is verbatim.