Are written Enneagram type tests a good way to type yourself?
No pencil-and-paper type tests are foolproof. Don Riso and Russ Hudson have done more work than any other Enneagram writers to develop a battery of type tests — and yet, they still caution students to use them only as one element in the search for the person’s type. Because of the inherent limitations of type tests (including skipping questions, not reading words, misunderstanding concepts, projection and misinterpretation, nervousness, being too analytic, and so forth), it is almost impossible to have any test that is consistently higher than about 85% accurate for determining basic type.
Even so, the RHETI (The Riso-Hudson Enneagram Type Indicator, Version 2.5) has been independently scientifically validated and is accurate in around 80% of cases, and the new QUEST-TAS quick questionnaires in The Wisdom of the Enneagram are also equally accurate. (Both are available in Offprint booklets from The Enneagram Institute, and the QUEST-TAS scoring form is more sophisticated in the Offprint than in the original book.) For both the RHETI and the QUEST-TAS, we feel strongly that the user’s correct personality type will almost certainly be one of the three top scores, except in the rarest of cases. We also recommend that the results of the RHETI and the QUEST-TAS be evaluated by someone trained by Don Riso and Russ Hudson if the outcome of the tests does not seem to be correct. In any case, the tests should be taken as only one piece of evidence in the quest for self-discovery, and the person should be encouraged to continue to observe himself, to read reliable books and to attend workshops for more insight into his type.