Interior design psychology is a field within environmental psychology, which concerns the environmental conditions of the interior. It is a direct study of the relationship between an environment and how that environment affects the behavior of its inhabitants, intending to maximize the positive effects of this relationship. Through interior design psychology, the performance and efficiency of the space and the well-being of the individual are improved. Figures like Walter Benjamin, Sigmund Freud, John B. Calhoun and Jean Baudrillard have shown that by incorporating this psychology into design one can control an environment and to an extent, the relationship and behavior of its inhabitants. An example of this is seen through the rat experiments conducted by Calhoun in which he noted the aggression, killing and changed sexual tendencies amongst rats. This experiment created a stark behavioral analogy between the rat’s behavior and inhabitation in high-rise building projects in the US after WWII, an example of which is the Pruitt-Igoe development in St Louis demolished in 1972 only 21 years after being erected.