How well the typical workshop meets professionals' needs to acquire new knowledge and maintain a high level of competence has been questioned. To adequately document the outcome of Workshops, well designed evaluation measures are essential. This article discusses the development of a self-rating tool to assess participant change after a workshop on working with families who have a child receiving early intervention services. One anticipated outcome of the workshop is that the therapist will indicate a higher level of performance in areas related to working with families. Prior to its use the evaluation tool's reliability and validity were examined.