Dan Graham's work questions the relationship between architecture and its psychological effects on us and remains as poignant today as it did in the late 1960's when Graham first began to investigate the relationship between architectural environments and those who inhabit them. His work continues to investigate the voyeuristic act of seeing oneself reflected, while at the same time watching others. This overlay of experience creates a focused dual perception amid a changing environment and / or audience. Dan Graham has described the broad practice of his work as "geometric forms inhabited and activated by the presence of the viewer, [producing] a sense of uneasiness and psychological alienation through a constant play between feelings of inclusion and exclusion."