Ledyard Romulus Tucker (19 September 1910 – 16 August 2004) was an American mathematician who specialized in

statistics Statistics (from German language, German: ', "description of a State (polity), state, a country") is the discipline that concerns the collection, organization, analysis, interpretation, and presentation of data. In applying statistics to a s ...

and

psychometrics Psychometrics is a field of study within psychology concerned with the theory and technique of measurement. Psychometrics generally covers specialized fields within psychology and education devoted to testing, measurement, assessment, and rela ...

. His Ph.D. advisor at the

University of Chicago The University of Chicago (UChicago, Chicago, or UChi) is a Private university, private research university in Chicago, Illinois, United States. Its main campus is in the Hyde Park, Chicago, Hyde Park neighborhood on Chicago's South Side, Chic ...

was

Louis Leon Thurstone Louis Leon Thurstone (May 29, 1887 – September 29, 1955) was an American pioneer in the fields of psychometrics and psychophysics. He conceived the approach to measurement known as the law of comparative judgment, and is well known for his co ...

. He was a lecturer in psychology at

Princeton University Princeton University is a private university, private Ivy League research university in Princeton, New Jersey, United States. Founded in 1746 in Elizabeth, New Jersey, Elizabeth as the College of New Jersey, Princeton is the List of Colonial ...

from 1948 to 1960, while simultaneously working at ETS. In 1960, he moved to working full-time in academia when he joined the

University of Illinois The University of Illinois Urbana-Champaign (UIUC, U of I, Illinois, or University of Illinois) is a public university, public land-grant university, land-grant research university in the Champaign–Urbana metropolitan area, Illinois, United ...

. The rest of his career was spent as professor of quantitative psychology and

educational psychology Educational psychology is the branch of psychology concerned with the scientific study of human learning. The study of learning processes, from both cognitive psychology, cognitive and behavioral psychology, behavioral perspectives, allows researc ...

at UIUC until he retired in 1979. Tucker is best known for his Tucker decomposition and Tucker–Koopman–Linn model. He is credited with the invention of Angoff method. In 1957 he was elected as a Fellow of the American Statistical Association.View/Search Fellows of the ASA
, accessed 2016-07-23. He died at his home in Savoy, Illinois, on August 16, 2004, aged 93.

Selected publications

References

A Conversation with Ledyard R Tucker
by Neil J. Dorans
Remembering Ledyard R Tucker
by Tom Stewart {{DEFAULTSORT:Tucker, Ledyard 1910 births 2004 deaths University of Colorado alumni University of Chicago alumni American intelligence researchers 20th-century American mathematicians 21st-century American mathematicians American statisticians People from Glenwood Springs, Colorado Fellows of the American Statistical Association People from Savoy, Illinois Mathematicians from Colorado Mathematicians from Illinois APA Distinguished Scientific Award for an Early Career Contribution to Psychology recipients