For the past six months, every time Maria has attempted to engage in sexual intercourse she experienced spasms of the muscles surrounding her vagina, which made intercourse impossible. What is her likely diagnosis?

Jack finds it extremely difficult to pull himself away from the blackjack table. He keeps thinking he will break even as the next hand will be his winning one. This is a ________ schedule.

Fill in the blank(s) with the appropriate word(s).

The use of objects that can be traded for food, candy, treats, or special privileges with the purpose of reinforcing behavior is called ________

a) participant modeling technique b) contingency contract c) group extinction procedure d) token economy