Donald Laming is retired from teaching in the Department of Experimental Psychology at the University of Cambridge, UK. His PhD research concerned choice-reaction times, especially the discovery of a cornucopia of sequential interactions in the 2-choice task, leading to Information Theory of Choice-Reaction Times (1968).He taught chiefly mathematical psychology, publishing Mathematical Psychology (1973), but this has natural developments in psychophysics, sensory discrimination and signal detection theory, learning, memory, and human judgment. A particular concern since 1968 has been the judgment of supra-threshold differences between stimuli. Further publications include: Sensory Analysis (1986), Contributions to Mathematical Psychology, Psychometrics, and Methodology (1994), and The Measurement of Sensation (1997).Latterly he has been interested in the application of psychophysics to social behaviour, around which he has published further work.