Robert Joseph "Bob" Mislevy, 74, formerly of Lawrenceville, New Jersey, and Wildwood, Illinois, passed away on May 22, 2025, in Severna Park, Maryland. Bob was born June 28, 1950, to Joseph and Ruth Mislevy (née Neisner).

Bob graduated as valedictorian from Warren Township High School in 1968. He obtained a bachelor's degree in mathematics in 1972 from Northern Illinois University, where he met and married his beloved wife, Roberta "Robbie" Mislevy (née Bronson) in 1973. Bob went on to earn a master's degree in mathematics from Northern Illinois University in 1974 and doctoral degree in research methodology from the University of Chicago in 1981.

In 1984, Bob accepted a job with Educational Testing Service and relocated with his family to Lawrenceville, New Jersey. During this time, Bob and Robbie raised two beautiful daughters, Jessica and Meredith, and enjoyed playing in volleyball leagues together.

In 2001, Bob joined the faculty at the University of Maryland in the Department of Measurement, Statistics, and Evaluation. There he proudly hooded his daughters when they earned their graduate degrees from the same department. In 2011, he returned to Educational Testing Service as the Frederic M. Lord Chair in Measurement and Statistics, serving in this distinguished role until his retirement in 2021.

Bob's accomplished career in educational measurement included serving as president of the Psychometric Society, serving on several National Academy of Sciences committees on improving learning and assessment, receiving career contribution awards from the AERA and NCME, and earning four times the NCME Award for Technical Contributions to Measurement.

In his later years Bob enjoyed traveling in Europe and to national parks across the United States with wife Robbie and spending much cherished time with his grandsons, while continuing to publish and advise on assessment projects. Throughout his life he was an avid reader, classic film enthusiast, drawing hobbyist, fan of classic rock music, and devoted family man.

Bob is survived by his children Jessica (Rémi) Mislevy and Meredith (Zachary) Hughes and three grandsons Alex and Elliot Hughes and Luke Gottheil; brother Richard (Cynthia) Mislevy and nieces Lea Ann Mislevy (Arjun) and Lorin Mislevy; sister-in-law Debra "Debbie" Bronson; and niece Cassara Bronson and grandnephews Rhyan, Reid, and Remi. Bob was preceded in death by his wife Robbie, his parents, and brother-in-law Robert Jay Bronson.

A celebration of life will be held later in 2025 in Maryland. In lieu of flowers, donations can be made to the American Cancer Society: https://donate.cancer.org/