Lehman, K.E. (2025, August). Coherence for Personal, Social, and Ecological Healing: A Quaternary Model of Prevention Healing the Self to Heal the World. Keynote presentation conducted at the 6^th International Conference on Research Psychology, University of Oxford, England.

Lehman, K.E. (2025, July). Neurodynamics and Clinical Implications of Heart-Brain Coherence and Non-Sleep Deep REST. Presentation conducted at the meeting   of the Neuroscience and Brain Disorders Summit, Amsterdam, Netherlands.