A researcher knows that there is a relationship between obesity and watching television for young children. However, it is not known whether children watch more TV because they are overweight, or whether they are overweight because they watch so much TV. This is an example of the third-variable problem

Which statement about suicide among children and youths is accurate?

a. The suicide rate in the United States has not changed over the past 25 years b. Suicide is the third leading cause of death among 15-24-year-olds. c. Children who commit suicide tend to have high levels of 5-HIAA in their brains. d. About 12,000 children between ages 5 and 14 attempt suicide each year in the United States.

What does temperament eventually develop into?

A. personality B. learned behavior C. conscience D. sensitivity