Dr. Humphry Osmond, a psychiatrist who researched hallucinogens. Osmond coined the term psychedelic and also worked in mental hospitals researching social environments and how they affect recovery. Some scholars see Environmental Psychology as strictly a sub-discipline of Psychology or Social Psychology; others see it as an entirely interdisciplinary study. Sommer viewed Environmental Psychology as both a sub-discipline within the behavioral sciences as well as an interdisciplinary study that involves a variety of disciplines and professions. His view of the discipline is reflected in his writing style; he communicates his ideas without technical, psychological jargon. Though his book, Personal Space, was not specifically written for people outside the field of Environmental Psychology, it is highly readable and thus, accessible to those designers or architects who may actually have the ability to influence building design. Works On Personal Space Sommer made the distinction between personal space and territory: "The concepts of 'personal space' can be distinguished from that of 'territory' in several ways. The most important difference is that personal space is carried around while territory is relatively stationary. The animal or man will usually mark the boundaries of his territory so that they are visible to others, but the boundaries of personal space are invisible. Personal space has the body as its center, while territory does not. Often the center of territory is the home of the animal or man. Animals will usually fight to maintain dominion over their territory but will withdraw if others intrude into their personal space." In his best known book Personal Space: The Behavioral Basis of Design, first published in 1969, Sommer argued that buildings should be built first for function (their usefulness to the user), not form (how they look). The book is divided into two sections: the first section is theoretical, and the second section concerns methods and their applications. In addition to this book, Sommer wrote many articles on personal space as well. On Learning And The Classroom Another theme in Sommer's research was the structure of the classroom and how it affects learning. As a high school student, Sommer himself experienced the difficulty of learning in a classroom where he was unable to see the blackboard due to the poor design of the room. He wrote that he struggled in the class until, later in the semester, it moved to a new room where he got a front row seat. There, he