The efficacy of Motivational Interviewing (MI), like other evidence-based counselling interventions, relies on the skills of the practitioner. Therefore, it is imperative that such practitioners receive sufficient training in order to successfully implement the method. Hence, it is important to ensure a given training programme has been effective through the use of reliable and valid measures of knowledge and skill acquisition. The Motivational Interviewing Treatment Integrity code (MITI) is one such measure of MI skill attainment; however its use is labour intensive and requires the submission of in-session trainee audio recordings. Other measures of MI skill or knowledge also exist which may be more practical for evaluating training programmes. However, these measures are under researched and are therefore rarely utilised across the MI training literature. The present research is an investigation of the psychometric properties of the Motivational Interviewing Knowledge and Attitudes Test (MIKAT), a test of MI knowledge and attitudes, and the Video Assessment of Simulated Encounters–Revised (VASE-R), a test of MI skill attainment through the use of video to simulate encounters with clients. The measures were administered during a training programme for staff of Child Youth and Family services (CYFs) New Zealand. The results suggest that the MIKAT and VASE-R are sensitive to the effects of training. However, it appeared both measures require refinement and possibly restructuring to make them more consistent with the most recent MI developments.