Attention, learning, memory, and estimated intellectual potential were examined in 26 Vietnam veterans diagnosed with posttraumatic stress disorder (PTSD) and in 21 Vietnam veterans without mental disorders. Results revealed PTSD-associated cognitive deficits on tasks of sustained attention, working memory, initial learning, and estimated premorbid intelligence but not on measures of focus of attention, shift of attention, or memory savings. Cognitive task performances adjusted for estimated native intelligence remained negatively correlated with PTSD severity. An intellectual measure adjusted for cognitive task performances was negatively correlated with PTSD severity, even after the authors statistically controlled the level of combat exposure. Results suggested that although intellectual resources may constitute a vulnerability–protective factor for PTSD development, PTSD was associated with cognitive impairment independent of intellectual functioning.

A growing literature suggests that human beings are often negatively impacted by participation in military combat, but there have been few attempts to document the psychological effects of war stress in the masses of troops deployed to action. We chose to study the relationship of Operation Desert Shield/Storm (ODS) participation and symptoms of psychological distress in a comparison of 215 Army National Guard and Army Reserve troops who were activated to service in the Persian Gulf and returned to the States without seeking mental health treatment services and 60 troops from these same units who were activated but not deployed overseas. Negative psychological outcomes were measured within four to ten months from homecoming in three domains: negative mood states, symptoms of posttraumatic stress disorder (PTSD), and physical health complaints. Results indicated that as war‐zone stress exposure increased, the frequency and severity of psychological symptoms were enhanced, providing correlational evidence of the adverse impact of war stress, at least among a subset of ODS returnees. As many as 16–24% of war zone exposed troops exhibited levels of distress symptomatology sufficiently exaggerated to suggest the presence of mental disorders, specifically clinical depression and PTSD. Psychological symptoms were less frequently reported among troops classified in the lower war‐zone stress exposure subset and those activated but not deployed to the Persian Gulf.