Background: Individuals with intellectual and developmental disabilities (IDD) experience high rates of physical and mental health problems; yet their health care is often inadequate. Information about their characteristics and health services needs is critical for planning efficient and equitable services. A logical source of such information is…

Compares the results of two survey designs administered to visitors of three South African nature reserves to ascertain changes in conservation awareness. Explains the method, data collection, questionnaire design, statistical tests, pretests, pilot studies, results, and conclusions of the study. Finds that no statistical differences between…