Background and objective. Standardized scales are useful for treatment planning and evaluation. The purpose of this study was to examine the reliability of the Trunk Impairment Scale (TIS) for children with cerebral palsy (CP). Design. This was an intra- and inter-observer reliability study. Methods. Video recordings of 25 children, 20 with CP and 5 with no motor impairment, in the age group 5–12 ...