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Please note that PBA® is a trademark of my company Savanteon LLC that has two websites: and (for internal auditors).

Theory of Personality Systems Interactions


Available in German only, known as "The Big White" due to its volume of more than 1200 pages: Kuhl, J., Motivation und Persönlichkeit, Hogrefe, 2001

Professor Julius Kuhl's website:​​

Website of the Institute for Motivation and Personality Development Assessment Research and Training (IMPART GmbH) that includes information about PSI Theory and the TOP/EOS personality scans based on PSI Theory:


Kuhl, J. & Quirin, M. & Koole, S. (2020). The Functional Architecture of Human Motivation: Personality Systems Interactions Theory. In book: A. J. Elliot (Ed.), Advances in Motivation Science (Vol. 7). Publisher: Elsevier. 10.1016/bs.adms.2020.06.001.


Kuhl, J. & Quirin, M. & Koole, S. (2015). Being someone: A neuropsychological model of the integrative self. Social and Personality Psychology Compass. Link


Engel, A. & Kuhl, J. (2015). Personality and Planning: The Interplay between Linear and Holistic Processing. In book: The Psychology of Planning in Organizations. Research and Applications. Edited by: Michael D. Mumford, Michael Frese. Taylor & Francis.


Publications Barbara R. Siegenthaler

Siegenthaler, B. 2021. Evaluating the Organization's Innovation Capability: A New Guiding Methodology. EDPACS Journal, Taylor & Francis. STATUS: Accepted, not yet published.

Siegenthaler, B. 2018. Evaluating organizational culture. PBA®: Hard data instead of "gut feel". Expert Focus 10/2018, a Swiss journal for auditing, taxes, and fiduciary. Article in GermanFrench

Speaking Engagements Barbara R. Siegenthaler

PBA® Speaking Engagements