Pediatric physical therapists apply an impressive knowledge base in making timely decisions for children with cerebral palsy. To illustrate the processes applied by pediatric physical therapists, this report describes the application of cognitive schemata, calledmovement scripts, which represent prototypical patterns of children with diplegic cerebral palsy. Retrospective think-aloud procedures were used to elicit verbalizations by three experienced and three novice pediatric clinicians as they watched videotapes of 48 intervention sessions involving 18 children. Transcribed dialogues were coded and analyzed to identify and describe movement scripts. Videotapes of five hourly treatment sessions representing four months of therapy were analyzed further to explore and illustrate the clinical application of movement scripts used by one experienced clinician. Movement scripts were used to encode, organize, store, retrieve, and apply clinical information. Six treatment activities, accounting for 71% of the treatment time for one experienced clinician and one child, illustrate how movements scripts were applied. These activities suggested movement scripts may help clinicians apply two current therapeutic theories (motor learning and neurodevelopmental treatment) in the midst of complex clinical conditions. Pediatric physical therapists used movement scripts as cognitive schemata to apply prototypical clinical information when making decisions during the evaluation and treatment of children with diplegic cerebral palsy. Understanding the application of these cognitive structures provides an important approach for investigating and implementing physical therapy procedures for children with cerebral palsy.