Description

The Riso-Hudson Enneagram Type Indicator (RHETI) Version 2.5 is a psychometric tool developed by Don Richard Riso and Russ Hudson for assessing the nine (9) personality types according to the Enneagram system. The RHETI is one of the most widely used and reliable tools for Enneagram assessment and is commonly applied in personal development, psychological evaluation, and career counseling.

Objective

The main objective of the RHETI is to identify an individual’s primary Enneagram type, as well as secondary types, providing a deep understanding of their personal qualities, motivations, and behaviors. This tool helps individuals discover their strengths and weaknesses and gain better insight into themselves and others.

Analysis

The RHETI Version 2.5 consists of 144 questions (also known as AQ-144) that evaluate an individual’s tendencies and preferences in relation to the nine Enneagram types. These questions are formulated as pairs of contrasting statements, and participants are asked to choose the statement that best describes them.
The nine Enneagram types are:
Type 1: The Reformer — Tendency toward perfectionism and moral integrity.
Type 2: The Helper — Tendency toward caring for and supporting others.
Type 3: The Achiever — Tendency toward ambition and self-promotion.
Type 4: The Individualist — Tendency toward uniqueness and emotional expression.
Type 5: The Investigator — Tendency toward analysis and gathering information.
Type 6: The Loyalist — Tendency toward loyalty and security.
Type 7: The Enthusiast — Tendency toward optimism and seeking experiences.
Type 8: The Challenger — Tendency toward strength and independence.
Type 9: The Peacemaker — Tendency toward peace and harmony.

Calibration

The calibration of the RHETI is carried out through the recording of participants’ responses to each pair of statements. These responses are coded and summarized to produce a score for each of the nine types. The overall scores for each type are then compared to determine the individual’s primary type and secondary types.
The interpretation of the results involves analyzing the highest scores to identify the dominant Enneagram type and understanding the behavioral and motivational patterns associated with that type.

References

Riso, D. R., & Hudson, R. (1996). Personality Types: Using the Enneagram for Self-Discovery. Houghton Mifflin Harcourt.
Riso, D. R., & Hudson, R. (2000). The Wisdom of the Enneagram: The Complete Guide to Psychological and Spiritual Growth for the Nine Personality Types. Bantam.
Palmer, H. (1991). The Enneagram: Understanding Yourself and the Others in Your Life. HarperOne.
Daniels, D., & Price, V. (2000). The Essential Enneagram: The Definitive Personality Test and Self-Discovery Guide. HarperOne.