Riso–Hudson Enneagram Type Indicator


The Riso–Hudson Enneagram Type Indicator is an Enneagram of Personality psychometric test. Don Richard Riso and Russ Hudson began development in 1993. Their research focused on constructing it as a personality measurement instrument.
The latest version consists of 144 pairs of forced-choice statements.
The RHETI has been found to be of heuristic value but minimal scientific research has been conducted. A 2002 review of validation studies of various Enneagram systems found guarded support for its reliability and validity.