Survival, Evasion, Resistance, and Escape (SERE): -Impairs reaction time, attention, vigilance, memory, and reasoning -One reaction time is usually impaired -The allocation of effort towards more complicated cognitive operations can momentarily hide the harmful effects of stress

U.S. Navy Seal training: -Impaired reaction time, vigilance, attention, and memory during “Hell Week” -Severe sleep deprivation and exposure to environmental, psychological, and physical stressors -Training environments are designed to mimic military operations through sleep loss, physical discomfort, perceived threat, and intense physical activity