The objective of this proposed project is to develop data collection modules that can be used to improve the quality of services for users of ankle-foot orthoses (AFOs), the largest group of orthosis users. Three specific aims are: 1. Identify issues that are important to the quality of care for AFO users as well as items and instruments that can be used to assess these quality issues. 2. Evaluate and validate patient-reported outcome instruments using performance instruments. 3. Specify items required for quality measure development and design data collection modules that can be used in quality improvement efforts and to demonstrate accountability of health care delivery.