Biff and his twin brother Bernie, were part of a twins study. They were first observed by the researchers when they were 5 years old, and then again later when they were 10 years old. What type of a study were they in?

Active participation in a church can serve as a buffer for children living in stressful circumstances

Indicate whether this statement is true or false.

According to the text, most physicians and mental health professionals now believe that

a. psychological factors affect only stress-related illnesses b. there is a mutual interaction between our minds and bodies c. physical events do not affect our emotional lives d. the body alone should be the basis of medical diagnosis and treatment