Architects, city planners, and other design professionals have used theory and research from psychology and other behavioral sciences to make their work more responsive to the needs of the people who use the buildings, parks, and city streets they help to shape. This book describes in detail thirteen cases in which that approach was followed. It analyzes the use of environmental design research in each case, demonstrating how it has made a positive contribution in these cases and how its use can improve design and planning processes in general and thus the quality of the built and natural environments.