Samuel J. Messick III (April 3, 1931 – October 6, 1998) was an American psychologist who worked for the Educational Testing Service (ETS), known for his contributions to validity theory.
He graduated from the University of Pennsylvania, where he earned a bachelor's degree, and he earned a PhD from Princeton University.
[1][2] Messick worked as a psychologist for the Educational Testing Service (ETS).
[1] The Quantitative and Qualitative Methods division (Division 5) of the American Psychological Association created the Samuel J. Messick Distinguished Scientific Contributions Award to honor Messick's contributions.
Douglas N. Jackson, a previous collaborator of Messick, earned the award in 2004.