The physical characteristics assessment (PCA), a newly developed illustrated checklist, is designed for use by allied health and education professionals to identify a viable method for an individual with cerebral palsy to access a computer. The PCA was developed in response to a documented void of such assessments in the literature. The value of PCA was assessed with respect to content validity, clinical utility, reliability (inter-rater), and opinion of persons with cerebral palsy and health and education professionals. Professionals (n = 72) and persons with cerebral palsy (n = 78) from 20 sites in Canada, Chile, England, Israel, Spain, and the United States participated in the study. Statistically, the PCA produced a highly significant (p< 0.001) assessment time savings compared with non-PCA methods. A statistically significant difference in the number of user/computer interface changes during five post-assessment computer training sessions was not shown between the PCA and non-PCA methods. Inter-rater reliability ranged between 90% and 100% (n = 33 pairs). Both persons with cerebral palsy assessed via the PCA and professionals using the PCA gave positive opinions. Overall results support the value of the PCA.