Paul M. Fitts (1912–1965) was a psychologist at the Ohio State University (later at the University of Michigan). He developed a model of human movement, Fitts's law, based on rapid, aimed movement, which went on to become one of the most highly successful and well studied mathematical models of human motion. By focusing his attention on human factors during his time as Lieutenant Colonel in the US Air Force, Fitts became known as one of the pioneers in improving aviation safety.