An investigation into the personality correlates of ability to withstand prolonged physical and emotional stress was carried out by the investigators, utilizing psychiatric interviews, Rorschach tests, physiological measures, and objective psychological tests. The subjects were volunteers entering the training program for Navy frogmen at the Naval Amphibious Base, Norfolk, Va.The training program for the Underwater Demolition Team Replacement Unit is a unique laboratory for the study of the effects of severe, prolonged, combined emotional and physical stress. One of the difficulties in determining personality factors in stress resistance is that we cannot subject individuals to extreme stress in a psychological laboratory "for the sake of Science." This training program subjects trainees to such severe tests as carrying 350-1b life rafts on their heads across rough terrain through sand dunes while explosive charges are detonated near by, participating in unscheduled, forced night marches, and
HEYDER DW, WAMBACH HS. Sexuality and Affect in Frogmen: An Investigation of Personality Factors in Resistance to Prolonged Stress. Arch Gen Psychiatry. 1964;11(3):286–289. doi:10.1001/archpsyc.1964.01720270058007
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