Joseph L. Fleiss | |
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| Born | November 13, 1937 |
| Died | June 12, 2003 (aged 65) |
| Alma mater | Columbia University |
| Known for | mental health statistics development of Fleiss' kappa |
| Scientific career | |
| Fields | Biostatistics |
| Institutions | Columbia University |
Joseph L. Fleiss (November 13, 1937 – June 12, 2003) was an American 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.