Sidney Siegel (4 January 1916, New York – 29 November 1961) was an American psychologist who became especially well known for his work in popularising non-parametric statistics for use in the behavioural sciences. He was a co-developer of the statistical test known as the Siegel–Tukey test.
Siegel completed a Ph.D. in Psychology in 1953 at Stanford University. Except for a year spent at the Center for Advanced Study in the Behavioral Sciences at Stanford, he thereafter taught at Pennsylvania State University, until his death in November 1961 of a coronary thrombosis.
His parents, Jacob and Rebecca Siegel were immigrants from Romania.
- Nonparametric Statistics for the Behavioral Sciences, 1956
- Bargaining and Group Decision Making (co-authored with Lawrence E. Fouraker), winning the 1959 Monograph Price of the American Association for the Advancement of Science
- Bargaining Behaviour (co-authoree with Lawrence E. Fouraker).
- A nonparametric sum of ranks procedure for relative spread in unpaired samples, in Journal of the American Statistical Association, 1960 (coauthored with John Wilder Tukey)
- Choice, Strategy, and Utility (completed posthumously by Alberta E. Siegel and Julia McMichael Andrews)