Benjamin Schoendorff, MA, MSc, is a clinical psychologist with a passion for disseminating contextual psychotherapies. He is the author of two French language books, an ACT self-help book, and a clinician s manual based on the matrix diagram. A peer-reviewed acceptance and commitment therapy (ACT) trainer, he leads international workshops on integrating ACT and relationship-focused functional analytic psychotherapy through the use of the Matrix.