People are becoming more aware of the relationships between the built environment and their physical and psychological well-being. This has encouraged numerous studies in the field of environment and behavior, and effects of architecture, urban design and architectural form on human response. In the realm of architectural form, some professionals, from "signature" architects to environmental and organic designers, are strong advocates of free-flowing curvilinear forms. They assume that the use of curvilinear forms is sympathetic to the body, mind and spirit, although there is little empirical research to confirm this claim. There is also little research on the topic of signature / star architects and their design methods. The purpose of this multi-method study was to investigate the emotional effects of curvilinear forms in interior architectural settings.