Joseph L. Fleiss | |
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Born |
Brooklyn, New York |
November 13, 1937
Died | June 12, 2003 New Jersey |
(aged 65)
Fields | Biostatistics |
Institutions | Columbia University |
Alma mater | Columbia University |
Known for |
mental health statistics development of Fleiss' kappa |
Joseph L. Fleiss (November 13, 1937 – June 12, 2003) was a professor of biostatistics at the Columbia University Mailman School of Public Health, where he also served as head of the Division of Biostatistics from 1975 to 1992. He is known for his work in mental health statistics, particularly assessing the reliability of diagnostic classifications, and the measures, models, and control of errors in categorization.
Fleiss was born in Brooklyn, New York. He attended Columbia College of Columbia University and was awarded a bachelor's degree in 1959. He earned an M.S. in biostatistics in 1961 from the Columbia University School of Public Health (now called the Mailman School of Public Health), and a Ph.D. in statistics in 1967 from the Department of Mathematical Statistics in the Columbia Graduate School of Arts and Sciences.
Fleiss began his career as a biostatistician at the Biometrics Research Unit of the New York State Psychiatric Institute. While working at the Psychiatric Institute, he became a professor at the Columbia University School of Public Health.
Fleiss served as head of the Division of Biostatistics at the School of Public Health from 1975 to 1992. Under his leadership, the Division increased in size and stature. Fleiss transformed the Division from a small program consisting chiefly of New Yorkers into a department with international prestige by recruiting top faculty from major institutions around the world.
One of Fleiss's chief concerns was mental health statistics, particularly assessing the reliability of diagnostic classifications, and the measures, models, and control of errors in categorization. He was among the first to notice the equivalence of weighted kappa and the intraclass correlation coefficient as measures of reliability in categorical data (see Fleiss' kappa).