Early research indirectly leading to the Five Factor Model
-- Tupes EC, Christal RE. (1961, May). Recurrent personality factors based on trait ratings
(ASD-TR-61-97). Lackland Air Force Base, TX: Aeronautical Systems Division,
Personnel Laboratory. Found support for five factors, which turned out to overlap with the Big Five.
-- Tupes EC, Christal RE. (1961, May). Recurrent personality factors based on trait ratings
(ASD-TR-61-97). Lackland Air Force Base, TX: Aeronautical Systems Division,
Personnel Laboratory. Found support for five factors, which turned out to overlap with the Big Five.