Barry throws the football into the stands after scoring a touchdown, and is cheered by the fans. As a result, Barry is more likely to throw the ball into the stands whenever he scores a touchdown. This is an example of:

To a health psychologist, what interesting observation can be made when comparing the top 10 causes of death in the United States in 1900 to the top 10 causes of death in the United States in 2000?

a. The leading causes of death today are lifestyle diseases. b. Infectious diseases continue to be the major causes. c. There has been little change over almost 100 years. d. Homicide and suicide cause almost as many deaths as cancer.

How many children in the United States are obese?

a. 4% of girls and 6% of boys b. 10% c. Between 16% and 25% d. It is impossible to tell because we have no clear definition of what obesity is