The Enneagram at Work, Reviewed: Nine Types in Search of Evidence

Of all the instruments that have crossed from the spiritual world into the workplace, the Enneagram has travelled furthest on the least luggage. Nine personality types arranged around a nine-pointed star; wings, arrows, levels of development; an origin story gesturing at desert fathers and Sufi masters; and, in the past decade, a booming corporate practice of Enneagram team days.

It deserves what every instrument in this series gets: its publisher's claims, checked against the published record.

Where does the Enneagram come from?

Not from antiquity, despite the mystique. The Enneagram of personality is a twentieth-century construction: Oscar Ichazo developed the system from the 1950s in his Arica school, drawing the nine-pointed symbol from the Gurdjieff tradition, and psychiatrist Claudio Naranjo - who studied under Ichazo in 1970 - mapped the nine points onto personality types and taught them at Esalen, from where they spread through spiritual and later corporate channels. Ichazo himself later objected strongly to how Naranjo and others taught it. The RHETI test arrived in 1993, from Don Riso and Russ Hudson.

The lineage matters because the mystique does commercial work. A system believed ancient borrows authority no twentieth-century questionnaire could claim. The reality - a symbol from the Gurdjieff tradition, a typology assembled in 1970s California, and a founder who spent his later years objecting to what his students taught - is more interesting and rather less authoritative. Even within the tradition, the types were contested from the start.

The publisher's claims and the record

The Enneagram Institute describes its RHETI test - 144 forced-choice paired statements, about forty minutes - as "the world's most popular Enneagram-based test" and "a scientifically validated, forced-choice personality test" that has been "independently scientifically validated".

Is the Enneagram scientifically valid?

The evidence is weak. The most thorough assessment - Hook and colleagues' 2021 systematic review of 104 samples in the Journal of Clinical Psychology - found mixed evidence of reliability and validity, with factor analyses typically recovering fewer than nine factors, undermining the nine-type structure itself. A 2006 Delphi poll of 101 doctoral-level psychologists rated Enneagram assessment at 4.14, approximating 'probably discredited'. The main test's publisher calls it scientifically validated; the reliability figures behind that claim range from .56 to .82, partly below conventional thresholds.

Walk through the claim. The "independent validation" rests substantially on a 2004 study by Newgent and colleagues, which reported internal-consistency figures between .56 and .82 across the nine type scales. The upper end is respectable; the lower end falls well below the .70 convention for research use, let alone decisions about people. The same study found correlations with the Big Five in theoretically expected directions - a genuine, modest positive.

The structural finding is the harder problem. When researchers let the data speak - factor analysis, which asks how many distinct dimensions the answers actually contain - the answers keep coming back with fewer than nine. A nine-type instrument whose own data cannot find nine types has a difficulty no amount of popularity resolves. Robert Todd Carroll's sceptical verdict - that the types are too vague and malleable to test, since anything relevant can be shoehorned to fit - is severe, but the shoehorn concern has empirical company: in research reviewed by Hook and colleagues, 87% of people accurately "predicted" their type after reading the descriptions first, which is exactly what confirmation bias would produce.

The generous reading

Fairness requires saying what the Enneagram gets right in spirit. Unlike most typologies, it centres on motivation rather than behaviour - why people do things, not just what they do - which is a genuinely better question, and the one serious motivation research also asks. Its practitioners emphasise growth and change rather than fixed identity. And its popularity in team settings reflects something real: people are hungry for structured ways to talk about their differences, and the Enneagram provides one that feels humane.

The trouble is that a good question deserves a working instrument. Motivation-centred, growth-oriented, difference-respecting - all of that describes what workplace assessment should be. Nine boxes with unstable measurement is not the only way to have it.

Should companies use the Enneagram for hiring or teams?

Not for hiring - on the evidence, no personality instrument reliably predicts individual job performance, and the Enneagram's psychometric record is weaker than most. For team conversation the risk-benefit is subtler: advocates find its focus on motivation opens generous discussions, and 87% of people in one review recognised their type after reading descriptions - but recognition is not accuracy, and the format invites confirmation bias. Anything consequential - roles, development budgets, team composition - deserves an instrument whose measurements hold still under scrutiny.

The alternative to nine boxes

The Enneagram's central instinct - read the motivation, expect the person to grow - is the same instinct behind Sariio MAPS, built with the opposite architecture: 60 work preference pairs on continuous scales instead of nine types; a ten-minute survey retaken at least twice a year instead of a lifetime label; movement between readings treated as the point rather than an embarrassment; and no verdicts, by design. Where the Enneagram says you are a Seven, a preference map says here is where you sit today, across sixty scales, and here is what has moved since spring - a reading built for the growth conversation the Enneagram promises. The wider question of what separates a defensible instrument from a beguiling one is the subject of are personality tests pseudoscience.

Read motivation on scales, not in boxes - the individual survey is free.

Sources

• Hook, J.N. et al. (2021), The Enneagram: A systematic review of the literature and directions for future research, Journal of Clinical Psychology, 77(4) - 104 samples
• Norcross, J.C., Koocher, G.P. and Garofalo, A. (2006), Discredited psychological treatments and tests: A Delphi poll, Professional Psychology: Research and Practice, 37(5)
• Newgent, R.A. et al. (2004), The Riso-Hudson Enneagram Type Indicator: Estimates of Reliability and Validity, Measurement and Evaluation in Counseling and Development, 36(4)
• The Enneagram Institute, the RHETI test and How the Enneagram System Works - publisher claims
• Wikipedia, Enneagram of Personality - origins, reception, Carroll's critique