Final answer:
Patients who have an internal locus of control are generally healthier, better able to cope, and less depressed than those with an external locus of control.
Step-by-step explanation:
According to the information provided, researchers at the University of Pennsylvania found that patients who have an internal locus of control are healthier, better able to cope, and less depressed than people who have an external locus of control. An internal locus of control refers to the belief that individuals have control over their own actions and outcomes, while an external locus of control refers to the belief that external forces or factors determine one's fate.