James McKeen Cattell was the first professor of psychology in the United States, teaching at the University of Pennsylvania in Philadelphia. He was a long-time editor and publisher of scientific journals and publications, including Science, and served on the board of trustees for Science Service, now known as Society for Science from 1921 to 1944.

Psychology is the study of mind and behavior. Its subject matter includes the behavior of humans and nonhumans, both conscious and unconscious phenomena, and mental processes such as thoughts, feelings, and motives. Psychology is an academic discipline of immense scope, crossing the boundaries between the natural and social sciences. Biological psychologists seek an understanding of the emergent properties of brains, linking the discipline to neuroscience. As social scientists, psychologists aim to understand the behavior of individuals and groups.