An evaluation of 3390 prevocational progress assessment forms in New South Wales suggested that the assessment instrument appears unable to detect underperforming doctors, and may not aid their professional development.1 Similarly, Queensland interns undertake five terms per year and, in each of these, they are assessed against 11 items in three domains: clinical competence, communication, and personal and professional skills. The purpose of the assessment is to identify underperformers and subsequently to help improve their performance. However, there is limited literature on the psychometric properties of the instruments used. Our study aimed to evaluate the construct validity and reliability of the instrument as a measure of interns’ performance.