For over twenty years, two similar types of training have attempted to reduce aviator caused accidents. Crew Resource Management was widely adopted by U.S. airlines, and has generally been credited with helping to dramatically reduce their accident rates. Interestingly, CRM was embraced with little scientific evidence that it could actually reduce operational errors. In contrast, Aeronautical Decision Making, aimed at general aviation users, underwent a series of double-blind experiments before being adopted. And, although some users suggested ADM training significantly reduced their accidents, it was never fully implemented. This may explain the limited improvement in general aviation accident rates, when compared with the airline rates for the last two decades.
Diehl, A. E.
(2011). Human Performance Training: Successes and Failures in Civil Aviation. 16th International Symposium on Aviation Psychology, 62-67.