Hostility disturbs learning.

Many studies have shown that there is a strong correlation between hostility and coronary artery disease; however, the pathogenic mechanisms by which hostility causes coronary artery disease have not been identified. Several studies have shown that hostility is associated with increased cardiovascular reactivity to mental stress. Sloan and colleagues used mental arithmetic and the Stroop Color-Word Task as psychological stressors and suggested that hostility is associated with diminished cardiac vagal control.