title: J. Douglas Carroll (1939-2011).
authors.affiliation: Bell Laboratories, Murray Hill and Holmdel, NJ, USA.
authors.forename: Tapas K
authors.initials: TK
authors.lastname: Sen
mesh_terms: D049673:History, 20th Century; D049674:History, 21st Century; D006801:Humans; D008962:Models, Theoretical; D011584:Psychology / Q000266:history*; D011594:Psychometrics