There is consensus that to ensure the quality and transfer of clinical training, systematic evaluation of training programs should take place, as the effectiveness of new evidenced based treatment interventions can be compromised by poor generalisation of skills to the workplace. In this book, the acquisition of case conceptualisation skills, as a core clinical competency to be acquired in training, is evaluated using three newly developed case conceptualisation rating scales. In addition the impact of a self-practice/self- reflection training intervention, designed to enhance cognitive behaviour therapy case conceptualisation, is qualitatively explored. Participants in the study reported that their theoretical understanding of the cognitive-behaviour therapy model, self-awareness, empathy, conceptualisation of the therapeutic relationship, adaptation of their clinical interventions, and clinical practice were all enhanced by the self- practice/self-reflection intervention.