エニアグラム
Most, but not all, Enneagram of Personality theorists teach that a person's basic type is modified, at least to some extent, by the personality dynamics of the two adjacent types as indicated on the enneagram figure. These two types are often called "wings". A person with the Three personality type, for example, is understood to have points Two and Four as their wing types. The circle of the enneagram figure may indicate that the types or points exist on a spectrum rather than as distinct types or points unrelated to those adjacent to them. A person may be understood, therefore, to have a core type and one or two wing types which influence but do not change the core type. Empirical research into wing theory