The purpose of the current study was to determine perceptions of neuropsychologists (NPs) and speech-language pathologists (SLPs) regarding each other's roles in the rehabilitation setting, and to assess the type and extent of collaborations. Participants were 311 SLPs and 77 NPs working in a rehabilitation setting. Results indicated a great deal of overlap between the roles of SLPs and NPs. While there was much agreement about roles, misperceptions were evident with regard to some of the domains of assessment and treatment. A need for increased collaboration on planning assessments and treatment was evident. The results suggest the need for training of both disciplines in interdisciplinary collaboration and in roles of rehabilitation team members.