Despite advances in pain theory and increasing understanding regarding children's experiences of pain and measures to assess this, pain, and especially recurrent pain, remains under-treated. The development of an assessment measure that is valid and reliable but also able to aid engagement and communication could greatly improve the management of children's pain. The results of the current research support the validity of IMS as a pain intensity measure within a recurrent pain sample and its ability to assess information on multiple aspects of the child's pain experience.