STAGES Theory: The Matrix Revealed

Uncover the ways human development can deepen your understanding of yourself and your world.

Join Terri O’Fallon and Kim Barta for their Four-topic Online Series, as they take a deep dive into The STAGES Matrix, Grief, Parenting and States & STAGES

Welcome to STAGES International

Trainings, workshops and consulting informed by the STAGES model of human development.

What is the STAGES Model?

What is STAGES?

STAGES is an integrally based development model that charts human development, from the first person perspective encountered in infancy, to the latest researched levels of development— the late sixth-person perspective. The model was created by Terri O’Fallon and is based on decades of educational experience and over seven years of research. Its scoring system is derived from an integral developmental model, that includes quadrants and levels, and addresses lines, states, and reflects on masculine and feminine types.


One of the strengths of the STAGES model is that it has broad application in a variety of fields, both personal and professional. This includes:

  • Psychotherapy and Coaching
  • Business
  • Education
  • Parenting
  • Counseling and Advising


Comprehensive: Includes many dimensions of human experience

Predictive: The precision of the model allows clarity in navigating life stage transitions

Dynamic: Recognizes the fluid nature of human development; it is not a rigid model

Simple “3 Questions” method: For identifying current state/stage in self and others

What We Offer

STAGES Trainings

We offer online courses and in-person workshops on a variety of topics related to STAGES, both personal and professional. Please sign up for our email list below if you would like to be informed when trainings are offered.

STAGES Assessments

The STAGES Assessment identifies your core stage of perspective development within the STAGES mode. Your stage is a coherent and internally consistent belief system that describes how you are likely to think, feel, and behave in various life situations. This is the level from which you consistently make meaning of your life’s experiences. The assessment provides practical recommendations for further development and learning.


We work with companies, schools and other institutions to support their application of STAGES in areas such as leadership development, organizational development, governance and team building.

Please contact us if you would like more information about our consulting services.

Praise for the STAGES Model

“Terri O’Fallon is one of the very most important integrally informed researchers now working. I highly recommend checking her out at your earliest opportunity!”

Ken Wilber

The Integral Vision

“Post-conventional developmental stages are one of the most important yet under researched areas of Integral studies, and we can all be grateful to Terri O’Fallon, who is one of the very few researchers exploring this crucial topic.”

Roger Walsh

University of California Irvine Medical School