Two substudies were also conducted. The goal of substudy 1 was to determine what psychosocial factors predicted cardiovascular responding at work in Black and white women. Black and white normotensive nurses between the ages of 20-45 years served as subjects. Substudy 2 examined the affective and physiological responses of Black and white college students during challenge. Normotensive Black and white men and women were monitored for blood pressure and heart rate during rest and during three tasks including mirror star tracing, hand immersion cold pressor, and speech stressor.