A Review of Research on the Enneagram

A self-scoring questionnaire that works through nine blocks of statements, one per type. Rate how well each statement describes you, add up the columns, and the totals point to your dominant pattern.

Robert Tallon and Mario Sikora

The full psychometric documentation behind a widely used Enneagram test. Covers test design, reliability, content and factorial validity, and the demographic patterns found across respondents, with the correlation tables included in full.

Truity Psychometrics

Argues that a questionnaire result is a starting point, not a verdict. Looks at what assessments can and cannot tell you, and how to fold test results into a longer process of recognizing your own type.

Dirk Cloete and Lucille Greeff