Students from four health sciences programs (Medicine, Nursing, Occupational Therapy and Physiotherapy) participated in a two-day Sexuality Workshop and completed pre- and post-workshop questionnaires dealing with sexual attitudes, comfort, and knowledge. Eighteen months later, these students were asked to complete the same questionnaires. Not only had they sustained the gains made during the workshop, but they continued to show improvement in the three areas during this interval. However, of greater importance than the positive finding is the need to understand the range of methodological problems encountered in carrying out this type of follow-up educational inquiry and in seeking measures for improving the validity and generalizability of such research.