Estos son algunos de los estudios, correlaciones y validaciones realizadas por universidades:
- Randall, Stephen “Development of an Inventory to Assess Enneagram Personality Type” California Institute of Integral Studies GAX80-05160
- Wagner, Jerome “A descriptive, ralibbility, and validity study of the Enneagram Personality Typology” Loyola University GAX 81-09973”
- Wagner, J. P. and Walker, R. E. “Reliability and validity study of a Sufi personality typology: The enneagram.” J. Clin. Psychol., 39: 712–717. Department of Psychology, Loyola University.
Links con información y algunas investigaciones:
http://udini.proquest.com/view/an-analysis-of-the-validity-of-the-pqid:2425450421/
