Sidney S. Culbert

Sidney S. Culbert (1913 - October 28, 2003) psychologist and Esperantist. Born in Miles City, Montana; moved to Tacoma, Washington with his family in 1923 and lived in Tacoma and Seattle most of his life. He extensively researched the number of speakers of various languages throughout the world (by stratified sampling), and contributed to the World Almanac's section on "Principal Languages of the World". An Associate Professor of Psychology at the University of Washington (Seattle) for most of his academic career, in addition to his research into the speaking populations of languages he made significant contributions to the study of perception, contributions that were influential in the design of cockpit instrument panels in the Boeing 707 jet aircraft.

• Associated Press obituary
• Longer obituary article on Sidney and his wife Ruth
• Memorial page (largely in Esperanto)