In 1945, long before the Enneagram personality types were taught, Karen Horney's book Our Inner Conflicts was published. In that book are introduced the aggressive, compliant and detached types. In the Enneagram personality system, these types have been used to create the three so-called Horneyvian triads: aggressive, compliant and withdrawn. Although these Horneyvian triads are a widely accepted feature of the Enneagram system, the type descriptions in Our Inner Conflicts seem to match only three of the nine enneatypes.

The compliant type was applied to Enneagram types 1, 2 and 6. However, in Our Inner Conflicts Karen Horney's compliant type manifests all the traits that go with "moving toward" people, showing:

a marked need for affection and approval and an especial need for a "partner" - that is, a friend, lover, husband or wife "who is to fulfill all expectations of life and take responsibility for good and evil, his successful manipulation becoming the predominant task."

I could see the enneatype 2 in that description, but does that really sound like the perfectionist type 1 or the phobic and counter-phobic type 6?

Enneatypes 7, 8 and 3 have been associated with Karen Horney's aggressive type. From Our Inner Conflicts, Karen Horney describes the aggressive type with the tendency to "move against" people, introducing the type as follows:

His needs stem fundamentally from his feeling that the world is an arena where, in the Darwinian sense, only the fittest survive and the strong annihilate the weak.

That matches quite well with what is often given as the worldview of enneatype 8, but not the optimism of type 7 or the ability of type 3 to take on the image of the group.

Karen Horney's detached type was somewhere renamed the withdrawn type when applied to enneatypes 4, 5 and 9. In Our Inner Conflicts, Karen Horney describes the detached "moving away from" people type by first describing neurotic detachment.

Only if there is intolerable strain in associating with people and solitude becomes primarily a means of avoiding it is the wish to be alone an indication of neurotic detachment.

Although many people may wish to be alone from time-to-time, it is enneatype 5 where this privacy becomes more the rule than the exception.

The Horneyvian triads provide an example of how the Enneagram personality system sometimes takes the original concept or idea and twists it to force-fit it into the Enneagram symbol's 3 x 3 matrix.