The Enneagram of Personality is a typing system of nine connected types of personalities.

Today, Enneagram theories are mostly from Oscar Ichazo from the 1950s and Claudio Naranjo from the 1970s. Older history of ideas associated with the Enneagram of Personality are not agreed on.
The Enneagram of Personality is popular in business management and spirituality development using books and DVDs. In business it is used to find out into how employees can work together. In spirituality it is shown as a path to self-improvement and enlightenment. Both say it can aid in self-awareness and self-understanding.
| Type | Characteristic role | Basic fear | Basic desire | Temptation | Vice | Virtue | Stress | Security |
|---|---|---|---|---|---|---|---|---|
| 1 | Perfectionist | Corruptness, imbalance, being bad | Goodness, integrity, balance | Hypocrisy, hypercriticism | Anger | Serenity | 4 | 7 |
| 2 | Helper | Being unloved | To feel love | Deny own needs, manipulation | Pride | Humility | 8 | 4 |
| 3 | Performer | Worthlessness | To feel valuable | Pushing self to always be "the best" | Deceit | Truthfulness, Authenticity | 9 | 6 |
| 4 | Individualist | Having no identity or significance | To be uniquely themselves | To overuse imagination in search of self | Envy | Equanimity (Emotional Balance) | 2 | 1 |
| 5 | Researcher | Helplessness, incapability, incompetence | Mastery, understanding | Replacing direct experience with concepts | Avarice | Non-Attachment | 7 | 8 |
| 6 | Skeptic | Being without support or guidance | To have support and guidance | Indecision, doubt, seeking reassurance | Fear | Courage | 3 | 9 |
| 7 | Enthusiast | Being unfulfilled, trapped, deprived | To be satisfied and content | Thinking fulfillment is somewhere else | Gluttony | Sobriety | 1 | 5 |
| 8 | Protector | Being controlled, harmed, violated | Self-protection | Thinking they are completely self-sufficient | Lust (Forcefulness) | Innocence | 5 | 2 |
| 9 | Peacemaker | Loss, fragmentation, separation | Wholeness, peace of mind | Avoiding conflicts, avoiding self-assertion | Sloth (Disengagement) | Action | 6 | 3 |
The nine types are normally referred to by their numbers. Sometimes their "characteristic roles" (as archetypes) are used instead. Different different authors and teachers use different names.
The "stress" and "security" points (or "disintegration" and "integration" points) are the types connected by the lines of the enneagram shape. They are said to influence how a person behaves when they are stressed or relaxed. For example, someone who is a One type might start to feel like someone with a Four type when they are stressed or like a Seven type when they feel relaxed.
The types are also grouped into three centres.
A tritype is a 3-number combination of one of each from the centres, like 269 or 458.
The Enneagram mixes ideas usually accepted in the theory of personality but it has been sent away and called pseudoscience by some personality assessment experts. The Enneagram is criticised for having no basis in scientific fact.
The Enneagram is mildly popular. However some professionals call it pseudoscience. This is because the Enneagram is subjective and it can't be tested scientifically. Some describe it as a test that is not reliable or valid
In 2011, the scientific skeptic Robert Todd Carroll included the Enneagram in a list of pseudoscientific theories that "can't be tested because they are so vague and malleable that anything relevant can be shoehorned to fit the theory".