Donald D. Hoffman, American quantitative psychologist and author

Donald David Hoffman is an American cognitive psychologist and popular science author. He is a professor emeritus in the Department of Cognitive Sciences at the University of California, Irvine.

Quantitative psychology is a field of scientific study that focuses on the mathematical modeling, research design and methodology, and statistical analysis of psychological processes. It includes tests and other devices for measuring cognitive abilities. Quantitative psychologists develop and analyze a wide variety of research methods, including those of psychometrics, a field concerned with the theory and technique of psychological measurement.

December 29 is the 363rd day of the year in the Gregorian calendar; two days remain until the end of the year.