How many different personality disorders are currently listed in the DSM-IV-TR?

Abdul is taking his infant son on a walk around the neighborhood. As they go around the block, Abdul points out houses, trees, and various pets to his son. They are engaging in what type of interaction?

A) Object-oriented. B) Rhesus-type-B-oriented C) Affectivity-oriented D) Social

Which of the following would be considered an example of a “natural kind” concept?

a. blue b. wolf c. odd number d. mirror