This training, presented by Mr. Prescott and Dr. Nassen, focuses on the responsivity principle—matching treatment services to each client’s unique characteristics. As one of the three key principles of effective correctional rehabilitation, responsivity is often the least clearly understood in practice. The presenters explore how this concept applies to treatment programs for adults and older adolescents who commit sexual offenses, within the broader Risk-Need-Responsivity (RNR) framework. They discuss how childhood adversity can shape dynamic risk and functioning, and review evidence-informed methods for improving responsivity and the therapeutic alliance, including Feedback Informed Treatment and Motivational Interviewing.