Roger Shepard

Roger Shepard
Shepard at the ASU SciAPP conference in March 2019
Born	Roger Newland Shepard (1929-01-30)January 30, 1929 Palo Alto, California, U.S.
Died	May 30, 2022 (aged 93) Tucson, Arizona, U.S.
Occupation	cognitive scientist
Notable work	Shepard elephant, Shepard tones

Roger Newland Shepard (January 30, 1929 – May 30, 2022^[1]) was an American cognitive scientist and author of the "universal law of generalization" (1987). He was considered a father of research on spatial relations. He studied mental rotation, and was an inventor of non-metric multidimensional scaling, a method for representing certain kinds of statistical data in a graphical form that can be comprehended by humans. The optical illusion called Shepard tables and the auditory illusion called Shepard tones are named for him.